@article {42824, title = {Analysis of the use of genomic DNA as a universal reference in two channel DNA microarrays}, journal = {BMC Genomics}, volume = {6}, year = {2005}, month = {MAY}, pages = {Article Number. 66}, type = {Article}, abstract = {

Background: DNA microarray is an invaluable tool for gene expression explorations. In the two-dye microarray, fluorescence intensities of two samples, each labeled with a different dye, are compared after hybridization. To compare a large number of samples, the {\textquoteright}reference design{\textquoteright} is widely used, in which all RNA samples are hybridized to a common reference. Genomic DNA is an attractive candidate for use as a universal reference, especially for bacterial systems with a low percentage of non-coding sequences. However, genomic DNA, comprising of both the sense and anti-sense strands, is unlike the single stranded cDNA usually used in microarray hybridizations. The presence of the antisense strand in the {\textquoteright}reference{\textquoteright} leads to reactions between complementary labeled strands in solution and may cause the assay result to deviate from true values. Results: We have developed a mathematical model to predict the validity of using genomic DNA as a reference in the microarray assay. The model predicts that the assay can accurately estimate relative concentrations for a wide range of initial cDNA concentrations. Experimental results of DNA microarray assay using genomic DNA as a reference correlated well to those obtained by a direct hybridization between two cDNA samples. The model predicts that the initial concentrations of labeled genomic DNA strands and immobilized strands, and the hybridization time do not significantly affect the assay performance. At low values of the rate constant for hybridization between immobilized and mobile strands, the assay performance varies with the hybridization time and initial cDNA concentrations. For the case where a microarray with immobilized single strands is used, results from hybridizations using genomic DNA as a reference will correspond to true ratios under all conditions. Conclusion: Simulation using the mathematical model, and the experimental study presented here show the potential utility of microarray assays using genomic DNA as a reference. We conclude that the use of genomic DNA as reference DNA should greatly facilitate comparative transcriptome analysis.

}, doi = {10.1186/1471-2164-6-66}, author = {Gadgil, Mugdha and Lian, W. and Gadgil, Chetan J. and Kapur, V. and Wu, WS} } @article { ISI:000230123500084, title = {Aromatic polyimides from m-phenylene diamines containing pendant groups: synthesis and characterization}, journal = {Journal Applied Polymer Science}, volume = {97}, number = {3}, year = {2005}, month = {AUG}, pages = {1377-1384}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Two diamine monomers, 4-[4-(1-methyl-1-phenyl)phenoxy]-1,3-(diamino benzene and 4-{-[(4-methylphenyl)sulfonyl]phenoxy}-1,3-diamino benzene, were synthesized, and both diamines were polycondensed with three commercial dianhydrides to obtain aromatic polyimides containing pendant groups. The polyimides were characterized by solubility tests, viscosity measurements, IR, H-1-NMR, and C-13- NMR spectroscopy, x-ray diffraction studies, and thermogravimetric analysis. The polymides had inherent viscosities of 0.33-0.58 dL/g in m-cresol at 30 +/- 0.1 degrees C. All the polyimides were amorphous and were soluble in solvents such as NNdimethylacetamide, N-methyl-2-pyrrolidone, N,N-dimethylformamide, and in-cresol. Thermogravimetric analysis of the polymides indicated no weight loss below 410 degrees C under a nitrogen atmosphere. (c) 2005 Wiley Periodicals, Inc.

}, keywords = {heteroatom-containing polymers, High performance polymers, polyimides}, issn = {0021-8995}, doi = {10.1002/app.21859}, author = {Pal, R. R. and Patil, P. S. and Dere, R. T. and Salunkhe, M. M. and Maldar, Noormahamad N. and Wadgaonkar, P. P.} } @article { ISI:000230220900008, title = {Bacterial aerobic synthesis of nanocrystalline magnetite}, journal = {Journal of the American Chemical Society}, volume = {127}, number = {26}, year = {2005}, month = {JUL}, pages = {9326-9327}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, issn = {0002-7863}, doi = {10.1021/ja0508469}, author = {Bharde, Atul A. and Wani, A. and Shouche, Y. and Joy, Pattayil Alias and Bhagavatula L. V. Prasad and Sastry, M.} } @article { ISI:000227421800005, title = {Cataloguing Indian biota - Response}, journal = {Current Science}, volume = {88}, number = {4}, year = {2005}, month = {FEB}, pages = {532-533}, publisher = {CURRENT SCIENCE ASSN}, address = {C V RAMAN AVENUE, PO BOX 8005, BANGALORE 560 080, INDIA}, issn = {0011-3891}, author = {Chavan, V. and Watve, A. V. and Rane, N. S. and Krishnan, S.} } @article { ISI:000228743500063, title = {Comparison of the pervaporation separation of a water-acetonitrile mixture with zeolite-filled sodium alginate and poly(vinyl alcohol)-polyaniline semi-interpenetrating polymer network membranes}, journal = {Journal of Applied Polymer Science}, volume = {96}, number = {5}, year = {2005}, month = {JUN}, pages = {1968-1978}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

The pervaporation (PV) separation performance of ZSM-5- and Na-Y-type zeolite-filled sodium alginate (NaAlg) membranes were compared with those of pure NaAlg and semi-interpenetrating polymer network (semi-IPN) membranes of poly(vinyl alcohol) (PVA) with polyaniline (PANI) for the dehydration of acetonitrile. The PV separation characteristics of the zeolite-filled membranes showed a dependence on the nature of the zeolites. The variation of the acidity function of the ZSM-5 zeolite had an influence on the flux and selectivity of the membranes when compared to unfilled membranes. The crosslinked membranes were characterized by differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. Increasing the PANI content of the semi-IPN network increased the separation selectivity. Among the NaAlg membranes, the plain NaAlg membrane showed the highest selectivity of 414 at 30 mass \% water in the feed mixture, whereas the Na-Y- and ZSM-5 (40)-filled NaAlg membranes exhibited much lower values of selectivity, that is, 7.3 and 4.3, respectively for 30 mass \% water in the feed. When the flux and selectivity data of ZSM-5 (250)-filled NaAlg membranes were compared with that of Na-Y- or ZSM-5 (40)-filled NaAlg membranes, a noticeable increase in the selectivity for the ZSM-5 (250)filled NaAlg membrane was observed, but a somewhat comparable flux was observed compared to the plain NaAlg membrane. For the first time, PANI was polymerized with PVA to yield a semi-IPN. The total flux and water flux increased systematically, whereas the selectivity decreased greatly from 251.87 to 5.95 with increasing amounts of water in the feed. (c) 2005 Wiley Periodicals, Inc.

}, keywords = {Diffusion, interpenetrating network (IPN), zeolites}, issn = {0021-8995}, doi = {10.1002/app.21653}, author = {Naidu, B. V. K. and Bhat, S. D. and Sairam, M. and Wali, A. C. and Sawant, D. P. and Halligudi, Shivaraj B. and Mallikarjuna, N. N. and Aminabhavi, Tejraj M.} } @article { ISI:000226714000027, title = {Convenient synthesis of 5-methylene-4-substituted-2(5H)-furanones}, journal = {Tetrahedron Letters}, volume = {46}, number = {6}, year = {2005}, month = {FEB}, pages = {1009-1012}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A synthesis of novel 4-(substituted)benzyl-5-methylene-2(5H)-furanones involving Stobbe condensation of substituted aldehydes with ethyl levulinate followed by treatment with acetic anhydride in the presence of sodium acetate, has been developed. (C) 2004 Elsevier Ltd. All rights reserved.

}, keywords = {5-methylene-2(5H)-furanones, acetic anhydride, arylaldehydes, ethyl levulinate, sodium acetate}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2004.12.040}, author = {Mahajan, Vishal A. and Shinde, Popat D. and Borate, Hanumant B. and Wakharkar, Radhika D.} } @article { ISI:000227321900006, title = {Hydrophobically modified poly(acrylic acid) using 3-pentadecylcyclohexylamine: synthesis and rheology}, journal = {Macromolecular Chemistry and Physics}, volume = {206}, number = {4}, year = {2005}, month = {FEB}, pages = {464-472}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY}, abstract = {

Hydrophobically modified poly(acrylic acid) was synthesized using 3-pentadecylcyclohexylamine (3-PDCA), which was in turn synthesized from 3-pentadecylphenol, one of the components of cashew-nut shell liquid (CNSL), a renewable resource material. H-1 NMR spectra confirmed the incorporation of 3-PDCA onto PAA and a series of HMPs with three different molar concentrations, viz. congruent to 3, 5 and 7 mol-\% of 3-PDCA, were synthesized. An increase in viscosity with increasing hydrophobic content was observed by rheological measurements. The critical association concentrations were determined using an Ubbelohde viscometer and a controlled stress rheometer. The stability of HMPs towards temperature and shear was studied. Rheological measurements showed that there was a steady increase in viscosity with increase in hydrophobe content due to the formation of reversible networks. These polymers exhibited gel-like behavior at low concentrations (greater than or equal to2 wt.-\%) with an apparent yield stress (ca. 10 Pa) and showed shear thinning properties (non-Newtonian). However, below a critical concentration, c [eta], they showed Newtonian behavior.

}, keywords = {3-pentadecylcyclohexylamine (3-PDCA), hydrophobically modified polymers (HMPs), poly(acrylic acid), reversible associations, Rheology}, issn = {1022-1352}, doi = {10.1002/macp.200400392}, author = {Shedge, A. S. and Lele, Ashish K. and Wadgaonkar, P. P. and Hourdet, Dominique and Pcrrin, P. and Chassenieux, Christophe and Badiger, Manohar V.} } @article { ISI:000228136800013, title = {IndOBIS, an ocean biogeographic information system for assessment and conservation of indian ocean biodiversity}, journal = {Indian Journal of Marine Sciences}, volume = {34}, number = {1}, year = {2005}, note = {Workshop on Coastal and Marine Biodiversity of Indian Ocean Countries, Goa, INDIA, DEC, 2003}, month = {MAR}, pages = {120-127}, publisher = {NATL INST SCIENCE COMMUNICATION}, type = {Article}, address = {DR K S KRISHNAN MARG, NEW DELHI 110 012, INDIA}, abstract = {

Compilation of inventories of components of coastal and marine biodiversity of Indian Ocean is hampered by several factors: low effort by some countries, preference to certain taxon, dwindling taxonomic expertise, low infrastructure of Information Technology, databases that are scattered and often non-interoperable, inconsistent reporting and a marked reluctance to share data and information. The creation of the Indian Ocean node of the Ocean Biogeographic Information System is meant to overcome some of these constraints. Benefiting from progress in Information Technology and building on the global efforts on understanding what lives in our seas, the IndOBIS aims to grow into a self-sustaining and collectively supported process of information collation, analysis and dissemination, serving the countries of the region and the international scientific community.

}, keywords = {biodiversity informatics, biogeography, distributed database systems, Indian Ocean, IndOBIS, information systems, Ocean Biogeographic Information System}, issn = {0379-5136}, author = {Chavan, V. and Achuthankutty, C. T. and Vanden Berghe, E. and Wafar, M.} } @article { ISI:000230945400267, title = {Isopropyl 2,5-anhydro-3,4-di-O-tert-butyldiphenyl-silyl-L-ribonate}, journal = {Acta Crystallographica Section E - Structure Reports Online}, volume = {61}, number = {8}, year = {2005}, month = {AUG}, pages = {O2724-O2726}, publisher = {BLACKWELL PUBLISHING}, type = {Article}, address = {9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND}, abstract = {

Determination of the crystal structure of the title compound, C40H50O5Si2, firmly established its relative configuration and hence that of some related tetrahydrofuran carboxylates. The material crystallizes with Z{\textquoteright} = 2. Except for the chiral centres, the two independent molecules are related by a pseudo-centre of symmetry.

}, issn = {1600-5368}, doi = {10.1107/S1600536805023822}, author = {Glawar, A. F. G. and Watkin, D. J. and Sanjayan, G. J. and Tranter, G. E. and Edwards, Alison A. and Fleet, George W. J.} } @article { ISI:000229786700020, title = {Microwave promoted solvent-free one-pot synthesis of N,N {\textquoteleft}-disubstituted urea derivatives}, journal = {Journal of Chemical Research-S}, number = {3}, year = {2005}, month = {MAR}, pages = {205-208}, publisher = {SCIENCE REVIEWS LTD}, type = {Article}, address = {PO BOX 314, ST ALBANS AL1 4ZG, HERTS, ENGLAND}, abstract = {

An efficient one-pot synthesis of N,N -disubstituted urea derivatives from substituted anilines, ethyl chloroformate and methyl anthranilate or methyl 3-amino-2-butenoate under microwave irradiation is reported.

}, keywords = {Anilines, methyl 3-amino-2-butenoate, methyl anthranilate, Microwave, urea derivatives}, issn = {0308-2342}, author = {Jadhav, Vinod H. and Deshpande, S. S. and Borate, Hanumant B. and Wakharkar, R. D.} } @article { ISI:000228743500067, title = {Miscibility of chitosan-hydroxyethylcellulose blends in aqueous acetic acid solutions at 35 degrees C}, journal = {Journal of Applied Polymer Science}, volume = {96}, number = {5}, year = {2005}, month = {JUN}, pages = {1996-1998}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

The miscibility of blends of chitosan and hydroxyethylcellulose in a 2\% acetic acid solution was studied by viscometry, densitometry, and refractometry at 35 degrees C. The data suggest that the blends were completely miscible in all proportions. Further, the membranes were fabricated from concentrated blend solutions. The solid-state compatibility of the blends was confirmed by scanning electron microscopy. (c) 2005 Wiley Periodicals, Inc.

}, keywords = {blends, miscibility, refractive index, viscosity}, issn = {0021-8995}, doi = {10.1002/app.21421}, author = {Wali, A. C. and Naidu, B. V. K. and Mallikarjuna, N. N. and Sainkar, S. R. and Halligudi, Shivaraj B. and Aminabhavi, Tejraj M.} } @article { ISI:000232103800003, title = {Mitochondrial sequence reveals high levels of gene flow between breeds of domestic sheep from Asia and Europe}, journal = {Journal of Heredity}, volume = {96}, number = {5}, year = {2005}, month = {SEP}, pages = {494-501}, publisher = {OXFORD UNIV PRESS INC}, type = {Article}, address = {JOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513 USA}, abstract = {

Sequence variation present within the mitochondrial genome was used to investigate genetic diversity within sheep breeds from Asia and Europe. Comparison of 2027 bp of sequence from 121 animals revealed 44 phylogenetically informative nucleotide positions and a single insertion/deletion. A total of 57 haplotypes were observed which formed two distinct clades. Type A haplotypes were found in breeds from Asia (India, Indonesia, Mongolia, and Tibet), while type B haplotypes were observed at the highest frequency in breeds sourced from Europe (nine breeds from Austria, angstrom land, Finland, Spain, and northwestern Russia). The distribution of haplotypes indicates sheep appear to have the weakest population structure and the highest rate of intercontinental dispersal of any domestic animal reported to date. Only 2.7\% of the sequence variation observed was partitioned between continents, which is lower than both goat (approximately 10\%) and cattle (approximately 50\%). Diagnostic restriction fragment length polymorphism polymerase chain reaction (RFLP-PCR) tests which distinguish type A and B haplotypes were used to test an additional 223 animals from 17 breeds of European and Asian origin. A mixture of the two lineages was found in every breed except Suffolk and the Indian Garole, indicating introgression has played a major part during breed development and subsequent selection.

}, issn = {0022-1503}, doi = {10.1093/jhered/esi100}, author = {Meadows, J. R. S. and Li, K. and Kantanen, J. and Tapio, M. and Sipos, W. and Pardeshi, V. and Gupta, V. and Calvo, J. H. and Whan, V. and Norris, B. and Kijas, J. W.} } @article { ISI:000231573100016, title = {Polycondensation in liquid crystalline phases of nonionic surfactants. Kinetics and morphology}, journal = {Polymer}, volume = {46}, number = {19}, year = {2005}, month = {SEP}, pages = {7961-7968}, publisher = {ELSEVIER SCI LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

We have investigated acid-catalyzed polycondensation of alkoxysilane monomers in liquid crystalline phases of nonionic CnEm surfactants. The liquid crystalline phase is retained when the monomers polymerize. The high molecular weight molecules formed phase separate from the mesophase and are subsequently organized by it to form micron-sized particles. A variety of particle morphologies are formed by organization of the polymer particles in the mesophase. For condensation of dimethyldimethoxysilane (DMS, with trimethoxysilane, TMS as crosslinker) in hexagonal and lamellar phases, specific reaction conditions, viz. slow condensation kinetics and low crosslink density, give rod-like particles in hexagonal phases and sheet-like structures in lamellar phases. However, when higher acid concentrations are used, the reaction kinetics accelerates and irregular particles form. Irregular particles also form when the fraction of trifunctional crosslinker is increased, and finally complex flower-like structures form for condensation of trimethoxysilane in the hexagonal phase. The particle morphology formed is crucially dependent on the details of the polycondensation rate, crosslinker density and surfactant-monomer/oligomer interactions. (c) 2005 Elsevier Ltd. All rights reserved.

}, keywords = {nonionic, surfactant, templated synthesis}, issn = {0032-3861}, doi = {10.1016/j.polymer.2005.07.001}, author = {Kumaraswamy, Guruswamy and Wadekar, M. N. and Agrawal, Vikrant V. and Pasricha, R.} } @article { ISI:000228760300034, title = {Polymerization in surfactant liquid crystalline phases}, journal = {Chemistry of Materials}, volume = {17}, number = {9}, year = {2005}, month = {MAY}, pages = {2460-2465}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

We report the formation of cross-linked polysiloxane particles having rodlike and sheetlike morphologies by condensation of monomers in organized liquid crystalline mesophases of nonionic surfactants. The characteristic diffraction pattern obtained from the liquid crystalline surfactant assembly is preserved during polymer synthesis. The polymer colloids are rodlike when synthesized in a hexagonal mesophase and are sheetlike when synthesized in a lamellar mesophase. Interestingly, the size of the polymer particles is on the order of micrometers, viz. 3 orders of magnitude larger than the characteristic size of the surfactant mesophase. Thus, the polymers phase separate from the liquid crystalline phase during polymerization, and organize to resemble the mesophase geometry. The polymer particles are organized so as to minimize the elastic distortion of the surfactant mesophase after they phase separate. We speculate that the observed particle morphologies are formed due to the slow kinetics of polycondensation under our experimental conditions.

}, issn = {0897-4756}, doi = {10.1021/cm048240r}, author = {Wadekar, M. N. and Pasricha, R. and Gaikwad, A. B. and Kumaraswamy, Guruswamy} } @article { ISI:000233067000013, title = {Preparation and characterization of a copper based Indian traditional drug: tamra bhasma}, journal = {Journal of Pharmaceutical and Biomedical Analysis}, volume = {39}, number = {5}, year = {2005}, month = {OCT}, pages = {951-955}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

The copper based Indian traditional drug {\textquoteleft}tamra bhasma{\textquoteright} is administered for various ailments since long. Its synthesis involves treating metallic copper with plant juices and then repeated calcination in presence of air so that the metallic state is transformed into the corresponding oxide form traditionally known as {\textquoteleft}bhasma{\textquoteright}. In this work, we present a systematic characterization of this traditional drug using various techniques like X-ray diffraction (XRD), scanning electron microscopy (SEM)-energy dispersive X-ray analysis (EDX), X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR), thermogravimetry (TG) and surface area measurement. The results obtained were found to match very well with those of a standard copper oxide confirming the composition of the drug sample. In addition, some specific findings were also made which could help in interpreting the therapeutic properties of the traditional drug {\textquoteleft}tamra bhasma{\textquoteright}. (c) 2005 Elsevier B.V. All rights reserved.

}, keywords = {copper oxide, crystallite size, tamra bhasma, traditional medicine, XPS of copper oxide, XRD}, issn = {0731-7085}, doi = {10.1016/j.jpba.2005.06.015}, author = {Wadekar, M. P. and Rode, C. V. and Bendale, Y. N. and Patil, K. R. and Prabhune, Asmita} } @article { ISI:000232886800008, title = {Synthesis and analysis of ZnO and CdSe nanoparticles}, journal = {Pramana-Journal of Physics}, volume = {65}, number = {4, SI}, year = {2005}, note = {1st National Conference on Nanoscience and Technology, Pune, INDIA, MAR 07-08, 2005}, month = {OCT}, pages = {615-620}, publisher = {INDIAN ACADEMY SCIENCES}, type = {Article}, address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA}, abstract = {

Zinc oxide and cadmium selenide particles in the nanometer size regime have been synthesized using chemical routes. The particles were capped using thioglycerol in case of ZnO and 2-mercaptoethanol in case of CdSe to achieve the stability and avoid the coalescence. Zinc oxide nanoparticles were doped with europium to study their optical properties. A variety of techniques like UV-Vis absorption spectroscopy, X-ray diffraction (XRD), photoluminescence (PL), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM) were used to carry out structural and spectroscopic characterizations of the nanoparticles.

}, keywords = {chemical capping, Doping, Nanoparticles, photoluminescence}, issn = {0304-4289}, doi = {10.1007/BF03010449}, author = {Ashtaputre, S. S. and Deshpande, Aparna and Marathe, Sayali and Wankhede, M. E. and Chimanpure, J. and Pasricha, R. and Urban, J. and Haram, Santosh K. and Gosavi, S. W. and Kulkarni, S. K.} } @article { ISI:000226787200011, title = {Synthesis and characterization of aromatic polyamides containing an s-triazine ring with thiophenoxy linkages}, journal = {Polymer International}, volume = {54}, number = {3}, year = {2005}, month = {MAR}, pages = {569-575}, publisher = {JOHN WILEY \& SONS LTD}, type = {Article}, address = {THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND}, abstract = {

A series of aromatic polyamides containing an s-triazine ring with thiophenoxy linkages was synthesized from two new diacids, namely 2,4-bis-(4-carboxyphenoxy)-6-thiophenoxy-s-triazine and 2,4-bis-(3-carboxyphenoxy)-6-thiophenoxy-s-triazine, and commercially available aromatic diamines by using Yamazaki{\textquoteright}s phosphorylation reaction. The polyamides were obtained in good yields and were characterized by solubility tests, viscosity measurements, FTIR, H-1 and C-13 NMR spectroscopy, X-ray diffraction studies and thermogravimetric analysis. The polyamides were found to have inherent viscosities in the range of 0.35 to 0.56 dl g(-1) in N,N-dimethylacetamide (DMAc) at 30 +/- 0.1 degreesC. All the polyamides were readily soluble in solvents such as DMAc, N-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF) and m-cresol. Thermogravimetric analysis of the polyamides indicated no weight loss below 345 degreesC under a nitrogen atmosphere. (C) 2004 Society of Chemical Industry.

}, keywords = {2, 4-bis-(3/4-carboxyphenoxy)-6-thiophenoxy-s-triazine, direct polycondensation, polyamide, s-triazine ring}, issn = {0959-8103}, doi = {10.1002/pi.1733}, author = {Pal, R. R. and Patil, P. S. and Salunkhe, M. M. and Maldar, Noormahamad N. and Wadgaonkar, P. P.} } @article { ISI:000229051200014, title = {Synthesis and characterization of polyimides and co-polyimides having pendant benzoic acid moiety}, journal = {Polymer}, volume = {46}, number = {11}, year = {2005}, month = {MAY}, pages = {3669-3676}, publisher = {ELSEVIER SCI LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

A novel diamine monomer, 2,4-diamino-4{\textquoteright}-carboxy diphenyl ether had been synthesized. Several polyimides were prepared by reacting this diamine with commercially available dianhydrides, such as benzophenone tetracarboxylic acid dianhydride (BTDA), 4,4{\textquoteright}bis{hexafluoroisopropylidene his (phthalic anhydride)} (6-FDA), oxydiphthalic anhydride (ODPA) and 3,3{\textquoteright},4,4{\textquoteright}-biphenyltetracarboxylic acid dianhydride (BPDA). Furthermore, copolymers from the resulting diamine and oxydianiline (ODA) with 6 FDA were also synthesized. The inherent viscosities of the polymers were 0.42-0.67 dl g(-1). The polymers have good solubility in polar aprotic solvents, high thermal stability up to 410 \° C in nitrogen and high glass transition temperatures (T-g) ranging from 260-330 \° C. These polymers formed tough flexible films by solution casting. {\textcopyright} 2005 Elsevier Ltd. All rights reserved.

}, keywords = {co-polyimides, diamine with pendant benzoic acid, polyimides with pendant benzoic acid}, issn = {0032-3861}, doi = {10.1016/j.polymer.2005.03.001}, author = {Kulkarni, M and Kothawade, S and Arabale, G. and Wagh, D and Vijayamohanan, K and Kulkarni, RA and Vernekar, SP} } @article { ISI:000234350400019, title = {Synthesis and swelling behaviour of hydrophobically modified responsive polymers in dilute aqueous solutions}, journal = {Polymer}, volume = {46}, number = {26}, year = {2005}, month = {DEC}, pages = {12190-12199}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

New series of associating polymers were synthesised in order to investigate opposite behaviours of hydrophobically modified water-soluble polymers and thermoresponsive water-soluble polymers carrying LCST stickers. On the basis of a poly(acrylic acid) backbone, amino-terminated poly(N-isopropylacrylamide), poly(ethylene oxide-co-propylene oxide) and/or dodecyl chains were grafted following a reaction of condensation activated by carbodiimide. Two homologous series of well-defined single grafted and double grafted copolymers were obtained, with double grafted chains containing both C12 and LCST grafts. The dilute solution properties of these copolymers were carefully studied by capillary viscometry. At low salt concentration and below the LCST of the grafts, the swelling properties of macromolecular chains are controlled either by intramolecular associations between hydrophobes, excluded volume effect exerted by hydrophilic grafts or by a balance between these opposite interactions. The deswelling of macromolecular chains, induced by hydrophobic interactions, is amplified at higher ionic strength and more particularly above the transition temperature of the side chains. (c) 2005 Elsevier Ltd. All rights reserved.

}, keywords = {associating polymers, poly(acrylic acid), viscometry}, issn = {0032-3861}, doi = {10.1016/j.polymer.2005.10.140}, author = {Iyer, N. P. and Hourdet, Dominique and Badiger, Manohar V. and Chassenieux, Christophe and Perrin, P. and Wadgaonkar, P.} } @article { ISI:000230375200016, title = {Synthesis of fine PbE (E = S, Se) powder from direct in situ reduction of sulphur or selenium}, journal = {Materials Chemistry and Physics}, volume = {93}, number = {1}, year = {2005}, month = {SEP}, pages = {91-94}, publisher = {ELSEVIER SCIENCE SA}, type = {Article}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

Lead sulphide and lead selenide have been prepared for the first time, by in situ reduction of elemental S or Se by using aqueous DMF or aqueous SFS as reducing agents and their reaction with lead acetate. The grayish-black powder has been characterized by powder XRD measurement, XPS and SEM/EDAX analysis. Powder X-ray diffraction pattern revealed that cubic PbE (E = S, Se) is formed with a little impurities of lead in case of PbSe. Slightly broader peaks in XRD measurement suggest small particles diameter in the powder. The particle size by using Scheffer{\textquoteright}s formula is found to be about 100 nm. Peaks due to free lead particles are observed in XPS and EDS (in case of PbSe) analysis and SEM analysis indicates agglomerated particles. (c) 2005 Elsevier B.V All rights reserved.

}, keywords = {Chemical synthesis, electronic materials, reduction, Semiconductor}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2005.02.025}, author = {Khanna, P. K. and Subbarao, VVVS and Wagh, M. and Jadhav, P. and Patil, K. R.} } @article { ISI:000227107500022, title = {Synthesis, structure, electrochemistry and ROMP-activity of new ferrocenyl analog of Grubbs{\textquoteright} metathesis catalyst}, journal = {Journal of Organometallic Chemistry}, volume = {690}, number = {4}, year = {2005}, month = {FEB}, pages = {1018-1027}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

Treatment of [(PCy3)(2)Cl2Ru=CH-Ph] (1) with vinylferrocene 1 and 1-ferrocenyl-1,3-butadiene 2 yielded solid products. These new complexes were characterized by H-1 NMR, P-31 NMR and C-13 NMR spectroscopy. X-ray crystal structures of both the complexes have been solved. The crystal structure of II confirmed the assigned structure and revealed existence of two sets of intermolecular C-H-Cl(M) type interactions, viz. (Ru)Cl-H-C(ferrocene) and (Ru)Cl-H-CHCl2. The air-stable, dark solid II is all efficient catalyst for ring-opening metathesis polymerization (ROMP) of cyclopentene, norbornene and cycloocta-1,5-diene. Electrochemical behavior of the complexes clearly reflects electronic communication between two metal centers. (C) 2004 Elsevier B.V. All rights reserved.

}, keywords = {Electrochemistry, ferrocene, Metathesis, non-covalent interactions, ring-opening metathesis polymerization, ruthenium carbene}, issn = {0022-328X}, doi = {10.1016/j.jorganchem.2004.11.012}, author = {Maishal, T. K. and Mondal, Biplab and Puranik, Vedavati G. and Wadgaonkar, P. P. and Lahiri, Goutam Kumar and Sarkar, A.} } @article { ISI:000232218700049, title = {Thermoreversible behavior of associating polymer solutions: thermothinning versus thermothickening}, journal = {Macromolecules}, volume = {38}, number = {20}, year = {2005}, month = {OCT}, pages = {8512-8521}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Self-assembling properties of poly(sodium acrylate) grafted with dodecyl [C12], PAAgC12, or poly(N-isopropylacrylamide) [PNIPA] side chains, PAAgPNIPA, were studied in unentangled semidilute aqueous solution. While PAAgC12 self-associates through hydrophobic interactions, the gelation of PAAgPNIPA is triggered by heating in response to the lower critical solution temperature of PNIPA (LCST similar to 32 degrees C). The local structure of the physical networks was investigated by small-angle neutron scattering, and the scattering patterns were described using a polydisperse sphere model taking into account hard-sphere interactions. This model allow us to draw a realistic picture of physical gels with quantitative information concerning the size of hydrophobic cores, the volume fraction of stickers in the aggregates, the fraction of stickers which take part in the aggregation process, the range of repulsive interactions, and the structural modifications induced by temperature. The description of the network is in good agreement with complementary data obtained from DSC and C-13 NMR. In the present work, a special emphasis has been given to the important relationship existing between the viscoelastic properties of associating polymer solutions and the binding energy of stickers leaving temporarily the micellar junction. Depending on the endothermic or exothermic nature of the disengagement process of the sticker (heat of demicellization), the relaxation time of the network and the viscoelastic properties will either decrease or increase with the temperature. The consequence is that aqueous solutions of PAAgC12 and PAAgPNIPA exhibit opposite rheological properties with the temperature, namely thermothinning and thermothickening. By mixing these two copolymers, we show that intermediate properties can be obtained but in that case a microphase-separated network is obtained as a result of copolymer segregation.

}, issn = {0024-9297}, doi = {10.1021/ma050786r}, author = {Hourdet, Dominique and Gadgil, Jayant and Podhajecka, K. and Badiger, Manohar V. and Brulet, A. and Wadgaonkar, P. P.} } @article { ISI:000233089900009, title = {Wittig-horner approach for the synthesis of tamoxifen}, journal = {Synthetic Communications}, volume = {35}, number = {21}, year = {2005}, month = {MAY}, pages = {2795-2800}, publisher = {TAYLOR \& FRANCIS INC}, type = {Article}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

A stereoselective synthesis of Z -tamoxifen, a tetra-substituted alkene with antiestrogenic activity, is described. The Wittig-Horner reaction has been employed as the key step to establish the olefin stereochemistry.

}, keywords = {anticancer drug, phosphonate, stereoselectivity, Tamoxifen, Wittig-Horner reaction}, issn = {0039-7911}, doi = {10.1080/00397910500290516}, author = {Pandey, RK and Wakharkar, RD and Kumar, P} } @article { ISI:000240393500018, title = {Analysis of single PEM fuel cell performances based on current density distribution measurement}, journal = {Journal of Fuel Cell Science and Technology}, volume = {3}, number = {3}, year = {2006}, note = {1st Conference on European Fuel Cell Technology and Applications (EFC2005), Rome, ITALY, DEC 14-16, 2005}, month = {AUG}, pages = {351-357}, publisher = {Univ Perugia; Italian Agcy New Technol \& Environm; Amer Soc Mech Engineers}, type = {Article}, address = {THREE PARK AVE, NEW YORK, NY 10016-5990 USA}, abstract = {

A new in situ measurement method of mapping the current density distribution in polymer electrolyte fuel cells (PEFC) is used to analyze the performance of a fuel cell under different operating conditions. The present method is useful in investigating the current density distribution in a single cell as well as a stack, which carries the information about the local reactant activity over the electrode area It was found that the current density close to the gas inlets is strongly influenced by the reactants{\textquoteright} relative humidity. The performance close to the gas outlets is greatly influenced by the inlet gas pressures and the stoichiometry factors of the reactant gases, mainly on the cathode side. It was also observed that the performance of the fuel cell drops with the increase in operating temperature if the reactant gases are not sufficiently humidified.

}, keywords = {current density distribution, fuel cell performance, PEFC}, issn = {1550-624X}, doi = {10.1115/1.2173664}, author = {Ghosh, P. C. and Wuester, T. and Dohle, H. and Kimiaie, N. and Mergel, J. and Stolten, D.} } @article { ISI:000237850400019, title = {Chemoselective dithioacetalization of aldehydes using silica sulfuric acid as a reusable catalyst}, journal = {Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry}, volume = {45}, number = {5}, year = {2006}, month = {MAY}, pages = {1291-1295}, publisher = {NATL INST SCIENCE COMMUNICATION}, type = {Article}, address = {DR K S KRISHNAN MARG, NEW DELHI 110 012, INDIA}, abstract = {

Silica sulfuric acid has been found to be an efficient and reusable catalyst for chemoselective dithioacetalization of aldehydes over ketones, in excellent yields.

}, keywords = {Chemoselective, dithioacetalization, silica sulfuric acid}, issn = {0376-4699}, author = {Pore, D. M. and Desai, Uday V. and Mane, R. B. and Wadgaonkar, P. P.} } @article { ISI:000241306300002, title = {Claisen rearrangement of allyl phenyl ether over zeolites beta, mordenite and Y}, journal = {Microporous and Mesoporous Materials}, volume = {95}, number = {1-3}, year = {2006}, month = {OCT}, pages = {8-16}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The Claisen rearrangement of allyl phenyl ether (APE) to o-allylphenol was investigated over zeolites beta (BEA), mordenite (MOR) and Y (FAU) with different Si/Al ratios. Over the zeolite catalysts, the allylphenol cyclized to produce 2,3-dihydro-2-methyl benzofuran. Larger catalyst loading, higher reaction temperatures and longer run duration favored the formation of the ring compound. Conversion was small over MOR and FAU although they possessed higher acidity (as measured by the temperature programmed desorption of ammonia) compared to BEA. Studies using BEA revealed that the nature of the solvent influenced the reaction rate. The order of reactivity in the solvents was, benzene \> EDC (1,2-dichloroethane) \> toluene \> TCE (1, 1,2,2-tetrachloroethane) \>\> ACN (acetonitrile). The intermediate allylphenol reacted with the aromatic solvents to produce byproducts when benzene and toluene were used as solvents. A kinetic analysis assuming first order series and parallel reactions is presented. (c) 2006 Elsevier Inc. All rights reserved.

}, keywords = {allyl phenyl ether, allylphenol, Benzofuran, Claisen rearrangement, zeolites}, issn = {1387-1811}, doi = {10.1016/j.micromeso.2006.05.001}, author = {Wagholikar, S. G. and Mayadevi, S. and Jacob, Nalini E. and Sivasanker, S.} } @article { ISI:000240258600018, title = {Crystallization and phase transformation kinetics of poly(1-butene)/MWCNT nanocomposites}, journal = {Polymer}, volume = {47}, number = {18}, year = {2006}, month = {AUG}, pages = {6414-6421}, publisher = {ELSEVIER SCI LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Poly(1-butene)/MWCNT nanocomposites were prepared by simple melt processing technique. Crystallization, crystal-to-crystal phase transformation and spherulitic morphology were studied using differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and optical microscopy (OM). The non-isothermal crystallization exhibited higher values of Z, derived from Avrami theory and lower values of F(T) obtained from Avrami-Ozawa analysis, while the isothermal crystallization revealed a significant increase in crystallization temperatures and lower crystallization half times compared to pristine PB. The observed changes in the crystallization kinetics were ascribed to the enhanced nucleation of PB in the presence of MWCNT. The nucleating activity calculated from the non-isothermal crystallization data revealed that the MWCNTs provide an active surface for the nucleation of PB. The optical micrographs exhibited significantly smaller crystallites with disordered morphology for the nanocomposites compared to the well defined spherulitic morphology for pristine PB. The rate of phase transformation from kinetically favored tetragonal to thermodynamically stable hexagonal form was noticeably enhanced as evidenced by the reduction in the half time for phase transformation from 58 h to 25 h for PB reinforced with 7\% MWCNT. (c) 2006 Elsevier Ltd. All rights reserved.

}, keywords = {MWCNT, Phase transformation, poly(1-butene)}, issn = {0032-3861}, doi = {10.1016/j.polymer.2006.07.011}, author = {Wanjale, Santosh D. and Jog, Jyoti Prakash} } @article { ISI:000238491100062, title = {Effect of calcination cycles on the preparation of tin oxide based traditional drug: studies on its formation and characterization}, journal = {Journal of Pharmaceutical and Biomedical Analysis}, volume = {41}, number = {4}, year = {2006}, month = {JUN}, pages = {1473-1478}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

The preparation method of metal based Indian traditional drugs involves conversion of a pure metal into its oxide by repeated high temperature calcination cycles. In this work, the effect of number of calcination cycles followed in the preparation of tin oxide based Ayurvedic drug, {\textquoteleft}vanga bhasma{\textquoteright} was studied by a systematic characterization of the drug samples after various calcination stages. It was found that tin was in the form of Sn4+ state and that the formation of SnO2 proceeded step-wise through Sn(OH)(4). (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {calcination cycles, Oxidation, oxidation state of tin, Particle size, tin oxide, vanga bhasma}, issn = {0731-7085}, doi = {10.1016/j.jpba.2006.03.032}, author = {Wadekar, M. P. and Rode, C. V. and Bendale, Y. N. and Patil, K. R. and Gaikwad, A. B. and Prabhune, Asmita} } @article { ISI:000242137400025, title = {Efficient deprotection of dithioacetals to carbonyls using Oxone-KBr in aqueous acetonitrile}, journal = {Tetrahedron Letters}, volume = {47}, number = {48}, year = {2006}, month = {NOV}, pages = {8559-8561}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A simple and efficient method has been developed for the chemoselective dethioacetalization of dithioacetals to aldehydes and ketones using Oxone-KBr in aqueous acetonitrile at room temperature. (c) 2006 Elsevier Ltd. All rights reserved.

}, keywords = {deprotection, dethioacetalization, Oxone}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2006.09.138}, author = {Desai, Uday V. and Pore, D. M. and Tamhankar, B. V. and Jadhav, Sushilkumar A. and Wadgaonkar, P. P.} } @article { ISI:000237993500018, title = {Efficient, solvent-free method for the chemoselective synthesis of acylals from aldehydes and their deprotection catalyzed by silica sulfuric acid as a reusable solid acid catalyst}, journal = {Catalysis Communications}, volume = {7}, number = {7}, year = {2006}, month = {JUL}, pages = {508-511}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

An efficient method has been developed for the chemoselective synthesis of acylals from aldehydes and acetic anhydride in the presence of silica sulfuric acid as a reusable solid acid catalyst under solvent-free conditions. Ketones are found to remain unaffected under the reaction conditions. The deprotection of acylals has also been achieved using SSA in methanol medium. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {Acylals, aldehydes, Chemoselective, protection and deprotection silica sulfuric acid}, issn = {1566-7367}, doi = {10.1016/j.catcom.2005.12.028}, author = {Desai, Uday V. and Thopate, T. S. and Pore, D. M. and Wadgaonkar, P. P.} } @article { ISI:000244831800017, title = {Electrochemical polymerization of o-anisidine on low carbon steel from aqueous salicylate solution: corrosion protection study}, journal = {Surface \& Coating Technology}, volume = {201}, number = {6}, year = {2006}, month = {DEC}, pages = {2240-2247}, publisher = {ELSEVIER SCIENCE SA}, type = {Article}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

The electrochemical polymerization of o-anisidine was carried out on low carbon steel from an aqueous salicylate medium using cyclic voltammetry. The resulting poly(o-anisidine) coatings were uniform and adherent to the steel substrates. These coatings were characterized by cyclic voltammetry, LTV-visible absorption spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction measurements and scanning electron microscopy. The ability of the poly(o-anisidine) coatings to protect low carbon steel in an aqueous 3\% NaCl was evaluated by the potentiodynamic polarization measurements. The potentiodynamic polarization measurement reveals that the poly(o-anisidine) coating increases the corrosion potential and reduces the corrosion rate of low carbon steel almost by a factor of 15. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {Conducting polymer coatings, corrosion protective coatings, cyclic voltammetry, Electrochemical polymerization, low carbon steel, poly(o-anisidine) coatings}, issn = {0257-8972}, doi = {10.1016/j.surfcoat.2006.03.028}, author = {Wankhede, M. G. and Gaikwad, A. B. and Patil, P. P.} } @article { ISI:000238418000031, title = {High performance poly(styrene-b-diene-b-styrene) triblock copolymers from a hydrocarbon-soluble and additive-free dicarbanionic initiator}, journal = {Journal of the American Chemical Society}, volume = {128}, number = {25}, year = {2006}, month = {JUN}, pages = {8158-8159}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, issn = {0002-7863}, doi = {10.1021/ja062695v}, author = {Matmour, Rachid and More, Arvind S. and Wadgaonkar, Prakash P. and Gnanou, Yves} } @article { ISI:000239077500014, title = {Liquid phase alkylation of phenol with 1-octene over large pore zeolites}, journal = {Applied Catalysis A-General}, volume = {309}, number = {1}, year = {2006}, month = {JUL}, pages = {106-114}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A comparative study is presented of the liquid phase alkylation of phenol with 1-octene over different zeolite catalysts: H-beta (BEA(15)), H-mordenite (MOR(11)) and H-USY (FAU(15)). A wide spectrum of monoalkylated products, identified as isomers of phenyl octyl ether (O-alkylate) and octyl phenol (C-alkylate), was formed in the reaction. The reaction was studied in detail over BEA(15), such studies included the influence of process variables such as temperature, reactant mole ratio, catalyst amount and alkali metal (K) poisoning on its performance in the alkylation reaction. A kinetic analysis of the reaction over BEA(15) was also carried out assuming a second order parallel reaction mechanism. The activity of the different catalysts for the reaction followed the order: BEA(15) \> FAU(15) \> MOR(11). The poisoning of BEA(15) with potassium resulted in a decrease in the catalyst activity concomitant with a decrease in the number of strong acid centres in the catalyst. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {1-octene, alkyl phenols, Alkylation, phenol, zeolites}, issn = {0926-860X}, doi = {10.1016/j.apcata.2006.04.041}, author = {Wagholikar, Smita and Mayadevi, S. and Sivasanker, S.} } @article { ISI:000242621800023, title = {Molecular interactions between the specialist herbivore Manduca sexta (Lepidoptera, Sphingidae) and its natural host Nicotiana attenuata. VII. changes in the plant{\textquoteright}s proteome}, journal = {Plant Physiology}, volume = {142}, number = {4}, year = {2006}, month = {DEC}, pages = {1621-1641}, publisher = {AMER SOC PLANT BIOLOGISTS}, type = {Article}, address = {15501 MONONA DRIVE, ROCKVILLE, MD 20855 USA}, abstract = {

When Manduca sexta attacks Nicotiana attenuata, fatty acid-amino acid conjugates (FACs) in the larvae{\textquoteright}s oral secretions (OS) are introduced into feeding wounds. These FACs trigger a transcriptional response that is similar to the response induced by insect damage. Using two-dimensional gel electrophoresis, matrix-assisted laser desorption ionization-time of flight, and liquid chromatography-tandem mass spectrometry, we characterized the proteins in phenolic extracts and in a nuclear fraction of leaves elicited by larval attack, and/or in leaves wounded and treated with OS, FAC-free OS, and synthetic FACs. Phenolic extracts yielded approximately 600 protein spots, many of which were altered by elicitation, whereas nuclear protein fractions yielded approximately 100 spots, most of which were unchanged by elicitation. Reproducible elicitor-induced changes in 90 spots were characterized. In general, proteins that increased were involved in primary metabolism, defense, and transcriptional and translational regulation; those that decreased were involved in photosynthesis. Like the transcriptional defense responses, proteomic changes were strongly elicited by the FACs in OS. A semiquantitative reverse transcription-PCR approach based on peptide sequences was used to compare transcript and protein accumulation patterns for 17 candidate proteins. In six cases the patterns of elicited transcript accumulation were consistent with those of elicited protein accumulation. Functional analysis of one of the identified proteins involved in photosynthesis, RuBPCase activase, was accomplished by virus-induced gene silencing. Plants with decreased levels of RuBPCase activase protein had reduced photosynthetic rates and RuBPCase activity, and less biomass, responses consistent with those of herbivore-attacked plants. We conclude that the response of the plant{\textquoteright}s proteome to herbivore elicitation is complex, and integrated transcriptome-proteome-metabolome analysis is required to fully understand this ubiquitous ecological interaction.

}, issn = {0032-0889}, doi = {10.1104/pp.106.088781}, author = {Giri, Ashok P. and Wuensche, Hendrik and Mitra, Sirsha Sribas and Zavala, Jorge A. and Muck, Alexander and Svatos, Ales and Baldwin, Ian T.} } @article { ISI:000242873400035, title = {Potassium phosphate or silica sulfuric acid catalyzed conjugate addition of thiols to alpha,beta-unsaturated ketones at room temperature under solvent-free conditions}, journal = {Tetrahedron Letters}, volume = {47}, number = {52}, year = {2006}, month = {DEC}, pages = {9325-9328}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Potassium phosphate and silica sulfuric acid have been found to be useful and highly efficient catalysts for conjugate addition of thiols to alpha,beta-unsaturated ketones under solvent-free conditions, at room temperature. Silica sulfuric acid (SSA) was found to be suitable for electron-deficient enones while potassium phosphate was found to effect thia-Michael addition with both, electron-deficient as well as electron-rich conjugated ketones. (c) 2006 Elsevier Ltd. All rights reserved.

}, keywords = {alpha, beta-unsaturated ketones, chalcones, conjugated enones, Michael addition, Potassium phosphate, silica sulfuric acid, thiols}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2006.10.114}, author = {Pore, D. M. and Soudagar, M. S. and Desai, Uday V. and Thopate, T. S. and Wadagaonkar, P. P.} } @article { ISI:000237600800007, title = {Rapid molecular identification of freshly squeezed and reconstituted orange juice}, journal = { International Journal of Food Science and Technology}, volume = {41}, number = {6}, year = {2006}, month = {JUN}, pages = {646-651}, publisher = {BLACKWELL PUBLISHING}, type = {Article}, address = {9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND}, abstract = {

This work presents a rapid and accurate molecular approach in the identification of freshly squeezed and reconstituted orange juice. Primers were designed based on the 18S and internal transcribed spacer (ITS) region. The findings indicated that self-made freshly squeezed orange juice heated to 80 degrees C for 30 s caused damage to DNA integrity, thus failing in amplification by primer 18S-ITSe, which gives a polymerase chain reaction product of 2081 bp, whereas primer 18S-ITSf, fragment length 2421 bp, could only be seen in heating conditions less stringent than 70 degrees C, 15 s. This new DNA integrity-dependent method has potential applications in identifying adulteration of freshly or processed orange juice.

}, keywords = {adulteration, citrus, DNA degradation, molecular detection, reconstituted juice}, issn = {0950-5423}, doi = {10.1111/j.1365-2621.2006.01125.x}, author = {Ng, C. C. and Chang, C. C. and Wu, I. C. and Kotwal, S. and Shyu, Y. T.} } @conference { ISI:000238125903326, title = {Surface characterization of diblock copolymers containing poly(ethylene oxide) and various hydrophobic moieties}, booktitle = {231st National Meeting of the American-Chemical-Society}, volume = {231}, year = {2006}, note = {231st National Meeting of the American-Chemical-Society, Atlanta, GA, MAR 26-30, 2006}, month = {MAR}, pages = {326-COLL}, publisher = {American-Chemical-Society}, organization = {American-Chemical-Society}, type = {Meeting Abstract}, address = {1155 16th ST, NW, Washington, DC 20036 USA}, issn = {0065-7727}, author = {Logan, Jennifer and Marcano, Kyle and Palaskar, Dnyaneshwar and Wadgaonkar, Prakash and Jost, Robert W. and Wudl, Fred and Baker, Shenda M.} } @article { ISI:000236423600081, title = {Synthesis and characterization of aromatic copolyesters containing siloxane linkages in the polymer backbone}, journal = {Journal of Applied Polymer Science}, volume = {100}, number = {4}, year = {2006}, month = {MAY}, pages = {3222-3228}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

A new series of aromatic copolyesters containing siloxane linkages were prepared by the melt polymerization of bisphenol A (BPA) with eugenol end-capped siloxane (EuSi), diphenyl terephthalate (DPT), and diphenyl isoplithalate (DPI) in varying ratio in the temperature range 220-290 degrees C under reduced pressure in the presence of dibutyl tin dilaurate (DBTL) catalyst. The siloxane copolyesters prepared were characterized by FTIR, H-1-NMR spectroscopy, solution viscosity, thermogravimetric analysis, differential scanning calorimetry, and X-ray diffraction. The effect of incorporation of eugenol end-capped siloxane was studied on the properties of BPA/DPI/DPT copolyesters. The glass-transition temperature of copolyester was decreased from 184 to 70 degrees C by incorporation of 20\% of eugenol endcapped siloxane. All copolyesters were found to be soluble in commonly used aprotic polar solvents and had film-forming properties. (c) 2006 Wiley Periodicals, Inc.

}, keywords = {aromatic copolyesters, Bisphenol A, diphenyl isophthalate, diphenyl terephthalate, eugenol end-capped siloxane, melt polymerization}, issn = {0021-8995}, doi = {10.1002/app.22266}, author = {Waghmare, P. B. and Idage, Susheela B. and Menon, Shamal K. and Idage, Bhaskar B.} } @article { ISI:000237680000010, title = {Synthesis and characterization of copolyarylates using tin octoate as a catalyst}, journal = {Journal of Applied Polymer Science}, volume = {101}, number = {1}, year = {2006}, month = {JUL}, pages = {70-77}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

A series of copolyarylates of bisphenol A (BPA) with varying ratios of diphenyl terephthalate (DPT) and diphenyl isophthalate (DPI) were prepared by melt polymerization at a temperature ranging from 200 to 290 degrees C under reduced pressure in the presence of tin octoate catalyst. Tin octoate catalyst has been extensively used for the preparation of biodegradable polymers namely, poly(lactic acid), poly(glycolic acid), and poly(lactide-glycolide) copolyesters. However, there are no reports on the preparation of copolyesters by melt polymerization using tin octoate catalyst. The effect of tin octoate catalyst was studied on the preparation of BPA/DPT/DPI copolyarylates. The copolyarylates were characterized by infrared and H-1 NMR spectroscopy, solution viscosity, thermogravimetric analysis, differential scanning calorimetry, and X-ray diffraction. The solution viscosities of copolyarylates were varied from 0.43 to 0.56 dL/g and the glass transition temperature (T-g) of copolyarylates was varied from 155 to 222 degrees C by varying the ratio of DPT and DPI. Most of the copolyarylates were found to be soluble in commonly used organic solvents and had film-forming properties. (c) 2006 Wiley Periodicals, Inc.

}, keywords = {copolyarylates, diphenyl isophthalate, diphenyl terephthalate, melt polymerization, tin octoate}, issn = {0021-8995}, doi = {10.1002/app.22953}, author = {Waghmare, P. B. and Pathak, P. and Deshmukh, S. A. and Idage, Susheela B. and Idage, Bhaskar B.} } @article { ISI:000240085700003, title = {Synthesis and characterization of novel hydrophobically end-capped poly(ethylene oxide)s [PEOs]}, journal = {Macromolecular Symposia}, volume = {241}, year = {2006}, note = {Indo-French Symposium on Fibrillar Networks as Advanced Materials, Inst Charles Sadron, Strasbourg, FRANCE, SEP 21-23, 2005}, month = {JUL}, pages = {9-13}, publisher = {Indo-French Ctr Promot Adv Res; Indian Assoc Cultivat Sci; Kolkata; GUENET; CNRS}, type = {Article}, address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY}, abstract = {

We report on the synthesis and characterization of a novel hydrophobically modified end-capped poly(ethylene oxide)s. The end-capping agent of this polymer was designed and synthesised from a renewable resource material namely, gallic acid (i.e. 3,4,5-trihydroxybenzoic acid), the byproduct of tannin industry. The hydroxyl groups at 3, 4 and 5 positions of gallic acid provide an opportunity for varying the hydrophobicity of the compound. The hydrophobic end-capping compound, 3,4,5tridodecyloxy bezoylazide was prepared from gallic acid and PEGS with different chain lengths (of number average molecular weights, 10000 and 35000 g/mol) were endcapped. using 3,4,5-tridodecyloxybenzoyl azide. The quantitative analysis of end-capping in the polymers was demonstrated by H-1-NMR spectroscopy and the rheological studies were carried out in the surfactant solutions.

}, keywords = {end-capped PEOs, hydrophobically modified polymers, water-soluble polymers}, issn = {1022-1360}, doi = {10.1002/masy.200650902}, author = {Badiger, Manohar V. and Kadam, Vijay S. and Lele, Ashish K. and Wadgaonkar, P. P. and Hourdet, Dominique} } @article { ISI:000238709700070, title = {Synthesis and characterization of siloxane copolyesters containing phenylindane linkages}, journal = {Journal of Applied Polymer Science}, volume = {101}, number = {4}, year = {2006}, month = {AUG}, pages = {2668-2674}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

A novel series of siloxane copolyesters containing 1,1,3-trimethyl-3-(p-hydroxyphenyl)-5-indanol (phenylindane bisphenol), diphenyl terephthalate (DPT), diphenyl isophthalate (DPI), and eugenol end-capped siloxanes in varying ratios were prepared at a temperature range of 200-290 degrees C under reduced pressure using dibutyl tin dilaurate catalyst by melt polycondensation. The siloxane-containing copolyesters were characterized by infrared and H-1 NMR spectroscopy, elemental analysis, solution viscosity, thermogravimetric analysis, differential scanning calorimetry, and X-ray diffraction. The effect of incorporation of siloxane moiety was studied on the properties of phenyl indane/DPT/DPI coplyester. The glass transition temperatures of copolyesters were decreased from 235 to 124 degrees C by incorporation of 10\% eugenol end-capped siloxane without affecting the thermal properties. All copolyesters were found to be soluble in commonly used organic solvents and had film forming properties. (c) 2006 Wiley Periodicals, Inc.

}, keywords = {eugenol end capped siloxane, melt polymerization, phenylindane bisphenol, siloxane copolyesters}, issn = {0021-8995}, doi = {10.1002/app.23910}, author = {Waghmare, P. B. and Deshmukh, S. A. and Idage, Susheela B. and Idage, Bhaskar B.} } @article { ISI:000241854900005, title = {Viscoelastic and dielectric behavior of poly(1-butene)/multiwalled carbon nanotube nanocomposites}, journal = {Journal of Macromolecular Science Part B-Physics}, volume = {45}, number = {6}, year = {2006}, month = {NOV}, pages = {1053-1064}, publisher = {TAYLOR \& FRANCIS INC}, type = {Article}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

Linear viscoelastic properties and dielectric behavior of poly(1-butene)/multiwalled carbon nanotube (MWCNT) nanocomposites were investigated. Dynamic mechanical analysis showed significant increase in storage modulus in the rubbery regime. The tan delta peak temperature remained constant; however, the peak intensity was lowered for the nanocomposites. In melt rheological studies the nanocomposites showed a shift in crossover frequency to the lower side, suggesting delayed relaxation of the molecular chains in the presence of MWCNT and this shift was found to depend on the content of MWCNT. The dielectric constant increased from 2.2 to 70 for the nanocomposite with 7 wt. \% MWCNT. The electrical conductivity increased significantly, from 10(-15) to 10(-3) S/cm. The results of rheology and dielectric studies indicate that a percolation network is formed that is responsible for the observed changes.

}, keywords = {Dielectric, MWCNT, poly(1-butene), viscoelastic}, issn = {0022-2348}, doi = {10.1080/00222340600929691}, author = {Wanjale, Santosh D. and Jog, Jyoti Prakash} } @article { ISI:000243831600015, title = {Acylation of anisole with long-chain carboxylic acids over wide pore zeolites}, journal = {Applied Catalysis A-General}, volume = {317}, number = {2}, year = {2007}, month = {FEB}, pages = {250-257}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The acylation of anisole with long-chain carboxylic acids (hexanoic, octanoic and decanoic) has been studied over three large pore zeolites-beta (BEA), faujasite (FAU) and mordenite (MOR). The acylation of anisole with the long chain acids produced mainly the ketone (4-methoxy phenyl alkyl ketone) and small amounts of the ester (phenyl alkanoate). The results revealed the reaction to be influenced by the type of zeolite and its Si/Al ratio (acidity) besides the chain length (carbon number) of the carboxylic acid. In the acylation of anisole with hexanoic acid, the activity of the zeolites increased with dealumination as it led to the generation of mesopores that resulted in a decrease in diffusion resistance of the zeolites. The reactivity of the acids in the acylation reaction was found to decrease with increase in the carbon number. The experimental data have been fitted into a pseudo first order kinetic model. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {Acylation, Anisole, decanoic acid, hexanoic acid, octanoic acid, zeolites}, issn = {0926-860X}, doi = {10.1016/j.apcata.2006.10.023}, author = {Wagholikar, S. G. and Niphadkar, P. S. and Mayadevi, S. and Sivasanker, S.} } @article { ISI:000207455800021, title = {Analysis of mitochondrial DNA sequences in childhood encephalomyopathies reveals new disease-associated variants}, journal = {Plos One}, volume = {2}, number = {9}, year = {2007}, month = {SEP}, pages = {e942}, publisher = {PUBLIC LIBRARY SCIENCE}, type = {Article}, address = {185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA}, abstract = {

Background. Mitochondrial encephalomyopathies are a heterogeneous group of clinical disorders generally caused due to mutations in either mitochondrial DNA (mtDNA) or nuclear genes encoding oxidative phosphorylation (OXPHOS). We analyzed the mtDNA sequences from a group of 23 pediatric patients with clinical and morphological features of mitochondrial encephalopathies and tried to establish a relationship of identified variants with the disease. Methodology/Principle Findings. Complete mitochondrial genomes were amplified by PCR and sequenced by automated DNA sequencing. Sequencing data was analyzed by SeqScape software and also confirmed by BLASTn program. Nucleotide sequences were compared with the revised Cambridge reference sequence (CRS) and sequences present in mitochondrial databases. The data obtained shows that a number of known and novel mtDNA variants were associated with the disease. Most of the non-synonymous variants were heteroplasmic (A4136G, A9194G and T11916A) suggesting their possibility of being pathogenic in nature. Some of the missense variants although homoplasmic were showing changes in highly conserved amino acids (T3394C, T3866C, and G9804A) and were previously identified with diseased conditions. Similarly, two other variants found in tRNA genes (G5783A and C8309T) could alter the secondary structure of Cys-tRNA and Lys-tRNA. Most of the variants occurred in single cases; however, a few occurred in more than one case (e. g. G5783A and A10149T). Conclusions and Significance. The mtDNA variants identified in this study could be the possible cause of mitochondrial encephalomyopathies with childhood onset in the patient group. Our study further strengthens the pathogenic score of known variants previously reported as provisionally pathogenic in mitochondrial diseases. The novel variants found in the present study can be potential candidates for further investigations to establish the relationship between their incidence and role in expressing the disease phenotype. This study will be useful in genetic diagnosis and counseling of mitochondrial diseases in India as well as worldwide.

}, issn = {1932-6203}, doi = {10.1371/journal.pone.0000942}, author = {Wani, Aijaz A. and Ahanger, Sajad H. and Bapat, Sharmila A. and Rangrez, Ashraf Y. and Hingankar, Nitin and Suresh, C. G. and Barnabas, Shama and Patole, Milind S. and Shouche, Yogesh S.} } @article { ISI:000247306400010, title = {Anhydrous magnesium sulfate mediated solvent-free synthesis of dihydropyrimidin-2(1H)-ones at ambient temperature}, journal = {Australian Journal of Chemistry}, volume = {60}, number = {6}, year = {2007}, month = {JUN}, pages = {435-438}, publisher = {CSIRO PUBLISHING}, type = {Article}, address = {150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA}, abstract = {

An anhydrous magnesium sulfate mediated solvent-free protocol is described for the synthesis of dihydropyrimidinones (Biginelli compounds) at ambient temperature.

}, issn = {0004-9425}, doi = {10.1071/CH07097}, author = {Pore, D. M. and Desai, Uday V. and Thopate, T. S. and Wadgaonkar, P. P.} } @article { ISI:000251722700028, title = {Assessing feasibility of polyarylate-clay nanocomposites towards improvement of gas selectivity}, journal = {Journal of Membrane Science}, volume = {306}, number = {1-2}, year = {2007}, month = {DEC}, pages = {277-286}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Polymer-clay nanocomposites are well known to reduce the penetrant permeability by following tortuous path. Effects of such reduction in gas permeability on variation in selectivity of nanocomposites prepared using a high permeability polymer were examined. The polyarylate: poly (tetramethyl bisphenolA-iso/terephthalate) that exhibits high permeability and moderate selectivity was chosen for making nanocomposites with two organically modified clays (Cloisite 6A and 10A) by solution intercalation method. The nanocomposite formation for various clay loadings (3, 5 and 7\% w/w) in polyarylate was ascertained by change in physical properties (X-ray diffraction, DMA, TEM). Behavior of solution viscosity and nanocomposite density indicated existence of polymer-clay layer interactions. As anticipated, though the gas permeability of pure gases, viz., He, N-2, CH4 and CO2 exhibited decrease, it was not monotonous. This decrease was more for larger gases (N-2, CH4 and CO2) in comparison to the decrease for smaller gas (He) permeability. This led to a decrease in CO2/N-2 and CO2/CH4 selectivities and increase in He/CO2 selectivity; while He/CH4 selectivity was increased substantially at 7\% clay loading. This variation indicated feasibility of nanocomposites formation as a tool for improving selectivity of certain gas pairs. (c) 2007 Elsevier B.V. All rights reserved.

}, keywords = {Gas permeation, Nanocomposites, polyarylates, selectivity, solution intercalation}, issn = {0376-7388}, doi = {10.1016/j.memsci.2007.09.001}, author = {Bhole, Yogesh S. and Wanjale, Santosh D. and Kharul, Ulhas K. and Jog, Jyoti Prakash} } @article { ISI:000242759500013, title = {Efficient N-arylation of amines catalyzed by Cu-Fe-hydrotalcite}, journal = {Catalysis Communications}, volume = {8}, number = {1}, year = {2007}, month = {JAN}, pages = {65-68}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

An efficient N-arylation of amines with aryl halides in presence of heterogeneous recyclable Cu-Fe-hydrotalcite catalyst has been developed. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {amines, Aryl halides, Cu-Fe-hydrotalcite, heterogeneous catalyst, N-arylation}, issn = {1566-7367}, doi = {10.1016/j.catcom.2006.05.030}, author = {Jadhav, Vinod H. and Dumbre, Deepa K. and Phapale, Vilas B. and Borate, Hanumant B. and Wakharkar, Radhika D.} } @article { ISI:000243492800021, title = {Enantiomeric separation of novel anticancer agent 5-hydroxy-3-(4-methoxyphenyl)-2-(3,4,5-trimethoxyphenyl)-cyclopent-2-en- 1-one}, journal = {Journal of Chromatography A}, volume = {1138}, number = {1-2}, year = {2007}, month = {JAN}, pages = {184-189}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The enantiomers of 5-hydroxy-3-(4-methoxyphenyl)-2-(3,4,5-trimethoxyphenyl)-cyclopent-2-en- 1-one, a novel anticancer agent, were separated by derivatisation with caronaldehyde, separation of the resulting diastereoisomers of the corresponding esters by silica gel column chromatography and regeneration of alcohols (S)-5-hydroxy-3-(4-methoxyphenyl)-2-(3,4,5-trimethoxyphenyl)-cyclopent-2 -en-1-one and (R)5-hydroxy-3-(4-methoxyphenyl)-2-(3,4,5-trimethoxyphenyl)-cyclopent-2- en- 1-one under aqueous conditions. The absolute configuration of the enantiomers was determined by H-1 NMR studies of the corresponding Mosher esters. Alternatively, the enantiomers were separated by preparative HPLC to collect the (S)- and (R)-5-hydroxy-3-(4-methoxyphenyl)-2-(3,4,5-trimethoxyphenyl)-cyclopent-2 -en-1-ones with high purity which was comparable with that obtained by the chemical method. The details of these methods have been presented herein. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {Anticancer, column chromatography, diaryl cyclopentenone, diastereoisomers, enantioseparation, HPLC, Resolution}, issn = {0021-9673}, doi = {10.1016/j.chroma.2006.10.076}, author = {Shinde, Popat D. and Jadhav, Vinod H. and Borate, Hanumant B. and Bhide, Sunil R. and Sonawane, Kiran B. and Wakharkar, Radhika D.} } @article {42685, title = {Interaction of different metal ions with carboxylic acid group: a quantitative study}, journal = {Journal of Physical Chemistry A}, volume = {111}, year = {2007}, month = {JUN}, pages = {6183{\textendash}6190}, type = {Article}, abstract = {

The binding strength of the carboxylic acid group (-COOH) with different divalent metal ions displays considerable variation in arachidic acid (AA) thin films. It is considered that in AA thin films the metal ions straddle the hydrophilic regions of the stacked bilayers of AA molecules via formation of carboxylates. In this study first the uptake of different divalent cations in films of AA is estimated by atomic absorption spectroscopy (AAS). Through the amount of cation uptake, it is found that the strength of binding of different cations varies as Ca2+ \> Co2+ \> Pb2+ \> Cd2+. Variation in the binding strength of different ions is also manifested in experiments where AA thin films are exposed to metal ion mixtures. The higher binding strength of AA with certain metal ions when exposed individually, as well as the preference over the other metal ions when exposed to mixtures, reveal some interesting deviation from the expected behavior based on considerations of ionic radii. For example, Pb2+ is always found to bind to AA much more strongly than Cd2+ even though the latter has smaller ionic radius, indicating that other factors also play an important role in governing the binding strength trends apart from the effects of ionic radii. Then, to get a more meaningful knowledge regarding the binding capability, first-principles calculations based on density functional theory have been applied to study the interaction of different cations with the simplest carboxylic acid, acetic acid, that can result in formation of metal diacetates. Their electronic and molecular structures, cohesive energies, and stiffness of the local potential energy well at the cation (M) site are determined and attempts are made to understand the diversity in geometry and the properties of binding of different metal ions with -COOH group. We find that the calculated M-O bond energies depend sensitively on the chemistry of M atom and follow the experimentally observed trends quite accurately. The trends in M-O bond energies and hence the total M-acetate binding energy trends can actually be related to their molecular structures that fall into different categories: Ca and Cd have tetrahedral coordination; Fe, Ni, and Co exhibit planar 4-fold coordination; and Pb is off-centered from the planar structure (forming pyramidal structure) due to its stereochemically active lone pair of electrons.

}, doi = {10.1021/jp067906x}, author = {Bala, Tanushree and Bhagavatula L. V. Prasad and Sastry, Murali and Kahaly, Mousumi Upadhyay and Waghmare, Umesh V.} } @article { ISI:000250410500033, title = {Synthesis and characterization of new aromatic polyesters containing biphenyl side groups}, journal = {Journal of Applied Polymer Science}, volume = {106}, number = {5}, year = {2007}, month = {DEC}, pages = {3105-3110}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Aromatic polyesters containing biphenyl side groups were synthesized by phase-transfer catalyzed interfacial polycondensation of 1-(4-biphenylyl)-1,1-bis(4-hydroxyphenyl) ethane (BBHPE) with terephthaloyl chloride (TPC), isophthaloyl chloride (IPC), and a mixture of TPC/IPC (50: 50 mol ratio). Copolyesters were synthesized by utilizing different molar proportions of BBHPE and 4,4-isopropylidenediphenol (BPA) with IPC and TPC. The inherent viscosities of polyesters were in the range 0.44-1.26 dL/g. All the polyesters were soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, meta-cresol, pyridine, N,N-dimethylformamide, N,N-dimethylacetamide, and 1-methyl-2-pyrrolidmone. Tough, transparent, and flexible films could be cast from chloroform solutions of these polyesters. WAXD measurements indicated that all the polyesters and copolyesters were amorphous in nature. Glass transition temperature of polyesters were in the range 198-256 degrees C, while the initial degradation temperature of polyesters were in the range 444-481 degrees C. Copolyesters derived from BBHPE exhibited improved solubility and higher glass transition temperatures compared to the corresponding polyesters based on BPA. (c) 2007 Wiley Periodicals, Inc.

}, keywords = {Aromatic polyesters, biphenyl side groups}, issn = {0021-8995}, doi = {10.1002/app.25862}, author = {Honkhambe, Pandurang N. and Avadhani, C. V. and Wadgaonkar, Prakash P. and Salunkhe, Manikrao M.} } @article { ISI:000245634500005, title = {Synthesis and evaluation of 4/5-hydroxy-2,3-diaryl(substituted)-cyclopent-2-en-1-ones as cis-restricted analogues of combretastatin A-4 as novel anticancer agents}, journal = {Journal of Medicinal Chemistry}, volume = {50}, number = {8}, year = {2007}, month = {APR}, pages = {1744-1753}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

A new series of 2,3-diaryl-4/5-hydroxy-cyclopent-2-en-1-one analogues replacing the cis double bond of combretastatin A-4 (CA-4) by 4/5-hydroxy cyclopentenone moieties was designed and synthesized. The analogues displayed potent cytotoxic activity (IC50 \< 1 mu g/mL) against a panel of human cancer cell lines and endothelial cells. The most potent analogues 11 and 42 belonging to the 5-hydroxy cyclopentenone class were further evaluated for their mechanism of action. Both of the analogues led to cell cycle arrest at G2/M phase and induced apoptosis in endothelial cells. Antitubulin property of 42 was superior to 11 and comparable to CA-4. The compound 42 had better aqueous solubility, metabolic stability, and pharmacokinetic profile than CA-4 and also demonstrated significant tumor regression in the human colon xenograft model. Our data suggests that cis-restricted analogues of CA-4 are a new class of molecules that have the potential to be developed as novel agents for the treatment of cancer.

}, issn = {0022-2623}, doi = {10.1021/jm060938o}, author = {Gurjar, Mukund K. and Wakharkar, Radhika D. and Singh, Anu T. and Jaggi, Manu and Borate, Hanumant B. and Shinde, Popat D. and Verma, Ritu and Rajendran, Praveen and Dutt, Sarjana and Singh, Gurvinder and Sanna, Vinod K. and Singh, Manoj K. and Srivastava, Sanjay K. and Mahajan, Vishal A. and Jadhav, Vinod H. and Dutta, Kakali and Krishnan, Karthik and Chaudhary, Anika and Agarwal, Shiv K. and Mukherjee, Rama and Burman, Anand C.} } @article { ISI:000246321200039, title = {Synthesis and LPG sensing properties of nano-sized cadmium oxide}, journal = {Talanta}, volume = {72}, number = {2}, year = {2007}, month = {APR}, pages = {594-599}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

This paper reports the synthesis and liquid petroleum gas (LPG) sensing properties of nano-sized cadmium oxide (CdO). The nano-sized CdO powder was successfully synthesized by using a chemical co-precipitation method using cadmium acetate and the ammonium hydroxide, as starting materials and water as a carrier. The resulting nano-sized powder was characterized by X-ray diffraction (XRD) measurements and the transmission electron microscopy (TEM). The LPG sensing properties of the synthesized nano-sized CdO were investigated at different operating temperatures and LPG concentrations. It was found that the calcination temperature and the operating temperature significantly affect the sensitivity of the nano-sized CdO powder to the LPG. The sensitivity is found to be maximum when the calcination temperature was 400 degrees C. The sensitivity to 75 ppm of LPG is maximum at an operating temperature 450 degrees C and it was found to be similar to 34 1 \%. The response and recovery times were found to be nearly 3-5s and 8-10s, respectively. The synthesized nano-sized CdO powder is able to detect up to 25 ppm for LPG with reasonable sensitivity at an operating temperature 450 degrees C and it can be reliably used to monitor the concentration of LPG over the range (25-75 ppm). The experimental results of the LPG sensing studies reveal that the nano-sized CdO powder synthesized by a simple co-precipitation method is a suitable material for the fabrication of the LPG sensor. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {chemical co-precipitation, Gas sensor, LPG, nano-sized CdO}, issn = {0039-9140}, doi = {10.1016/j.talanta.2006.11.024}, author = {Waghulade, R. B. and Patil, P. P. and Pasricha, Renu} } @article { ISI:000252176200024, title = {Synthesis of aromatic poly(amide-imide)s from novel diimide-diacid (DIDA) containing sulphone and bulky pendant groups by direct polycondensation with various diamines}, journal = {European Polymer Journal}, volume = {43}, number = {12}, year = {2007}, month = {DEC}, pages = {5047-5054}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A novel diimide-diacid (DIDA) monomer, 4-{4-[(4-methyl phenyl) sulphonyl]}-1,3-bis-trimellitoimido benzene containing sulphone and bulky pendant groups was successfully synthesized and used to synthesize a series of wholly aromatic poly(amide-imide)s (PAIs) by direct polycondensation method. The direct polycondensation of newly synthesized DIDA with different diamines was carried Out via Yamazaki{\textquoteright}s phosphorylation method using triphenyl phosphite and pyridine system. The resulting poly(amide-imide)s were obtained in quantitative yields with inherent viscosities 0.36-0.47 dl/g in DMAc at 30 +/- 0.1 degrees C. The poly(amide-imide)s were amorphous and were readily soluble in various solvents such as N-methyl-2-pyrrolidinone (NMP), NN-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), and pyridine. Tough and flexible films were obtained by casting their DMAc solution. According to thermogravimetric analysis, the polymers were fairly stable up to temperature around 396 degrees C, and 10\% weight losses in the temperature range of 476-511 degrees C that showed good thermal stabilities of these polymers. (c) 2007 Elsevier Ltd. All rights reserved.

}, keywords = {direct polycondensation, poly(amide-imide)s, sulphone and bulky pendant groups, thermally stable polymers}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2007.08.016}, author = {Patil, Prashant S. and Pal, Ravindra R. and Salunkhe, Manikrao M. and Maldar, Noormahamad N. and Wadgaonkar, Prakash P.} } @article { ISI:000256583100002, title = {Analysis of reactive oxygen species and antioxidant defenses in complex I deficient patients revealed a specific increase in superoxide dismutase activity}, journal = {Free Radical Research}, volume = {42}, number = {5}, year = {2008}, month = {MAY}, pages = {415-427}, publisher = {INFORMA HEALTHCARE}, type = {Article}, address = {TELEPHONE HOUSE, 69-77 PAUL STREET, LONDON EC2A 4LQ, ENGLAND}, abstract = {

The mechanism of free radical production by complex I deficiency is ill-defined, although it is of significant contemporary interest. This study studied the ROS production and antioxidant defenses in children with mitochondrial NADH dehydrogenase deficiency. ROS production has remained significantly elevated in patients compared to controls. The expression of all antioxidant enzymes significantly increased at mRNA level. However, the enzyme activities did not correlate with high mRNA or protein expression. Only the activity of superoxide dismutase (SOD) was found to correlate with higher mRNA expression in patient derived cell lines. The activities of the enzymes such as glutathione peroxidase (GPx), Catalase (CAT) and glutathione-S-transferase (GST) were significantly reduced in patients (p \< 0.05 or p \< 0.01). Glutathione reductase (GR) activity and intracellular glutathione (GSH) levels were not changed. Decreased enzyme activities could be due to post-translational or oxidative modification of ROS scavenging enzymes. The information on the status of ROS and marking the alteration of ROS scavenging enzymes in peripheral lymphocytes or lymphoblast cell lines will provide a better way to design antioxidant therapies for such disorders.

}, keywords = {antioxidant enzymes, mitochondrial complex I, mitochondrial myopathies, Reactive Oxygen Species (ROS)}, issn = {1071-5762}, doi = {10.1080/10715760802068571}, author = {Wani, Aijaz A. and Rangrez, Ashraf Y. and Kumar, Himanshu and Bapat, Sharmila A. and Suresh, C. G. and Barnabas, Shama and Patole, Milind S. and Shouche, Yogesh} } @article { ISI:000253620600025, title = {Facile air-oxidation of N-homopiperonyl-5,6-dimethoxyhomophthalimide: simple and efficient access to nuevamine}, journal = {Tetrahedron}, volume = {64}, number = {8}, year = {2008}, month = {FEB}, pages = {1786-1791}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A facile six-step synthesis of naturally occurring (+/-)-nuevamine with 55\% overall yield has been described, starting from methyl 2-(6-formyl-2,3-dimethoxyphenyl)acetate via the quantitative benzylic air-oxidation of the corresponding N-homopiperonyl-5,6-dimethoxy-homophthalimide to N-homopiperonyl-5,6-dimethoxyisoquinoline-1,3,4-trione as the key reaction, followed by base catalyzed regioselective alcoholysis of the trione with ring contraction, acid catalyzed dehydrative ring closure of the formed lactamol and decarboxylation pathway. (C) 2007 Elsevier Ltd. All rights reserved.

}, issn = {0040-4020}, doi = {10.1016/j.tet.2007.11.104}, author = {Wakchaure, Prasad B. and Easwar, Srinivasan and Puranik, Vedavati G. and N. P. Argade} } @article { ISI:000258374700003, title = {Facile biogenetic synthesis of pulcheotine A}, journal = {Synthesis-Stuttgart}, number = {15}, year = {2008}, month = {AUG}, pages = {2321-2322}, publisher = {GEORG THIEME VERLAG KG}, type = {Article}, address = {RUDIGERSTR 14, D-70469 STUTTGART, GERMANY}, abstract = {

Starting from homopiperonylamine and 4-methoxyphenylacetic acid, a facile biogenetic route to naturally occurring pulcheotine A has been demonstrated via Pictet-Spengler cyclization and two different air oxidation processes.

}, keywords = {4-methoxyphenylacetic acid, homopiperonylamine, Pictet-Spengler cyclization, pulcheotine A, regioselective air oxidations}, issn = {0039-7881}, doi = {10.1055/s-2008-1067162}, author = {Wakchaure, Prasad B. and N. P. Argade} } @article { ISI:000254017900032, title = {Facile single-step technique for simultaneous in situ fabrication of Ag/Ag2S-polymer nanocomposites via PPS cyclization route}, journal = {Chemistry Letters}, volume = {37}, number = {2}, year = {2008}, month = {FEB}, pages = {194-195}, publisher = {CHEMICAL SOC JAPAN}, type = {Article}, address = {1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPAN}, abstract = {

We herein propose a facile single-step approach involving solid-state reaction between silver salt and engineering thermoplastic polyphenylene sulfide for simultaneous in situ generation of nanoscale metallic silver as well as semiconducting silver sulfide.

}, issn = {0366-7022}, doi = {10.1246/cl.2008.194}, author = {Waghmare, Sujata and Shinde, Manish and Gholap, Ramkrishna S. and Rao, N. Koteswara and Seth, Tanay and Amalnerkar, Dinesh P.} } @article { ISI:000255692100010, title = {Fe-doped SnO(2) nanomaterial: a low temperature hydrogen sulfide gas sensor}, journal = {Materials Chemistry and Physics}, volume = {109}, number = {2-3}, year = {2008}, month = {JUN}, pages = {230-234}, publisher = {ELSEVIER SCIENCE SA}, type = {Article}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

The effect of Fe-doping on the surface chemistry and gas-sensing properties of nanocrystalline tin oxide is analyzed. The pristine and Fe-doped SnO(2) are synthesized by the modified Pechini citrate route that produces around 40 and 18 nm sized nanoparticles, respectively. 1 at.\% Fe-doped SnO(2) shows significantly high selectivity towards hydrogen sulfide gas with capability to detect even 10 ppm of hydrogen sulfide at room temperature, with change of about one order of magnitude in the resistance within 5-15 s. In comparison, pristine SnO(2) shows negligible response towards H(2)S at room temperature. The ideal response and recovery of Fe-doped SnO(2) at low concentration of gas suggests Fe-doped SnO(2) nanomaterial as a potential low cost, low temperature H(2)S gas sensor. (C) 2007 Elsevier B.V. All rights reserved.

}, keywords = {Fe-doping, H(2)S, nanomaterial, Sensor, tin oxide}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2007.11.024}, author = {Vaishampayan, Mukta V. and Deshmukh, Rupah G. and Walke, Pravin and Mulla, Imtiaz S.} } @article { ISI:000260640600003, title = {Intrinsic viscosity of aqueous solutions of carboxymethyl guar in the presence and in the absence of salt}, journal = {Macromolecular Chemistry and Physics}, volume = {209}, number = {20}, year = {2008}, month = {OCT}, pages = {2087-2093}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY}, abstract = {

Intrinsic viscosities were determined for solutions of CMG in pure water and 0.9 wt.-\% aqueous NaCl. To avoid the 0/0-type extrapolation typical for Huggins plots, a new procedure was used. For CMG and pure water, this requires only two adjustable parameters: the specific hydrodynamic volume of the polymer in the limit of infinite dilution and a hydrodynamic interaction parameter. The intrinsic viscosity of CMG (no salt) at room temperature is 6 050 mL . g(-1); approximately half as large as that of Na-PSS of comparable molar mass. The ratio of the intrinsic viscosities with and without salt is approximate to 7 for CMG, as compared to \>100 for Na-PSS. The reasons 1:5 5 for the different behaviors of the two types of polyelectrolytes are being discussed.

}, keywords = {Biopolymers, Carboxymethyl guar, intrinsic viscosity, polyelectrolyte, salt-free solutions}, issn = {1022-1352}, doi = {10.1002/macp.200800238}, author = {Badiger, Manohar V. and Gupta, Nivika R. and Eckelt, John and Wolf, Bernhard A.} } @article {43246, title = {Introduction to the density matrix renormalization group ansatz in quantum chemistry}, journal = {Frontiers in Quantum Systems in Chemistry and Physics}, volume = {18}, year = {2008}, month = {JAN}, pages = {49-65}, type = {Proceedings Paper}, abstract = {The Density Matrix Renormalisation Group (DMRG) is an electronic structure method that has recently been applied to ab-initio quantum chemistry. Even at this early stage, it has enabled the solution of many problems that would previously have been intractable with any other method, in particular, multireference problems with very large active spaces. Historically, the DMRG was not originally formulated from a wavefunction perspective, but rather in a Renormalisation Group (RG) language. However, it is now realised that a wavefunction view of the DMRG provides a more convenient, and in some cases more powerful, paradigm. Here we provide an expository introduction to the DMRG ansatz in the context of quantum chemistry.}, author = {Chan, Garnet Kin-Lic and Dorando, Jonathan J. and Ghosh, Debashree and Hachmann, Johannes and Neuscamman, Eric and Wang, Haitao and Yanai, Takeshi} } @article { ISI:000254543000039, title = {Local electronic structure and magnetic properties of LaMn(0.5)Co(0.5)O(3) studied by x-ray absorption and magnetic circular dichroism spectroscopy}, journal = {Physical Review B}, volume = {77}, number = {12}, year = {2008}, month = {MAR}, pages = {125124}, publisher = {AMER PHYSICAL SOC}, address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}, abstract = {

We have studied the local electronic structure of LaMn(0.5)Co(0.5)O(3) using soft-x-ray absorption spectroscopy at the Co-L(3,2) and Mn-L(3,2) edges. We found a high-spin Co(2+)-Mn(4+) valence state for samples with the optimal Curie temperature. We discovered that samples with lower Curie temperatures contain low-spin nonmagnetic Co(3+) ions. Using soft-x-ray magnetic circular dichroism, we established that the Co(2+) and Mn(4+) ions are ferromagnetically aligned. We also revealed that the Co(2+) ions have a large orbital moment: morb/mspin approximate to 0.47. Together with model calculations, this suggests the presence of a large magnetocrystalline anisotropy in the material and predicts a nontrivial temperature dependence for the magnetic susceptibility.

}, issn = {1098-0121}, doi = {10.1103/PhysRevB.77.125124}, author = {Burnus, T. and Hu, Z. and Hsieh, H. H. and Joly, V. L. Joseph and Joy, Pattayil Alias and Haverkort, M. W. and Wu, Hua and Tanaka, A. and Lin, H. -J. and Chen, C. T. and Tjeng, L. H.} } @article { ISI:000256931600006, title = {Microwave studies on synthesis of biologically active chalcone derivatives}, journal = {Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry}, volume = {47}, number = {6}, year = {2008}, month = {JUN}, pages = {927-931}, publisher = {COUNCIL SCIENTIFIC \& INDUSTRIAL RES}, address = {ANUSANDHAN BHAWAN, 2 RAFI MARG, NEW DELHI, 110001, INDIA}, abstract = {

Synthesis of pyrazole derivative using microwave energy has been carried out. The compound 1-[4-(2-hydroxy-ethoxy)-phenyl]-ethanone, is prepared from p-hydroxy-acetophenone and 2-chloro-ethanol. Chalcone derivative has been prepared by the condensation reaction of 1-[4-(2-hydroxy-ethoxy)-phenyl]- ethanone with 4-chlorobenzaldehyde. This chalcone. derivative cyclised with hydrazine hydrate and glacial acetic acid under microwave irradiation conditions give pyrazole derivative. These products have been characterized by detailed spectral analysis and have been screened for their antimicrobial activity, against Escherichia coli, Proteus vulgaris, and Salmonella typhimurium.

}, keywords = {Antimicrobial activity, chalcones, Pyrazole}, issn = {0376-4699}, author = {Katade, Sushama and Phalgune, Usha and Biswas, Sujata and Wakharkar, Radhika and Deshpande, Nirmala} } @article { ISI:000258370500013, title = {New route for preparation of luminescent mercaptoethanoate capped cadmium selenide quantum dots}, journal = {Bulletin of Materials Science}, volume = {31}, number = {3}, year = {2008}, note = {National Review and Coordination Meeting on Nanoscience and Nanotechnology, Hyderabad, INDIA, 2007}, month = {JUN}, pages = {291-296}, publisher = {INDIAN ACAD SCIENCES}, address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA}, abstract = {

We report a synthesis of cadmium selenide quantum dots (Q-CdSe) by refluxing a mixture of cadmium acetate, selenium powder, sodium sulfite and 2-mercaptoethanol in N,N{\textquoteright}-dimethyl formamide (DMF)/water solution. X-ray and electron diffractions suggest the formation of hexagonal phase of size quantized CdSe. Based on TEM analysis, the formation of nanoparticles with an average diameter of 3.5 +/- 0.5 nm is inferred. Their sols in DMF and dimethyl sulphoxide (DMSO) gave characteristic absorption peaks at 300 nm and 327 nm, which is attributed to the formation of high quality, size quantized CdSe particles. Extracted particles from the sol were readily redispersed in DMF and DMSO, which were diluted further with water without losing their optical and colloidal properties. FTIR spectroscopy suggested the formation of 2-mercaptoethanol thiolate on the particle surface, with free -OH groups available for linkage. Sols in DMSO and their solutions in water displayed an intense photoluminescence (PL).

}, keywords = {chalcogenides, Chemical synthesis, photoluminescence, semiconductor quantum dots}, issn = {0250-4707}, doi = {10.1007/s12034-008-0047-8}, author = {Wankhede, Manoj E. and Inamdar, Shaukatali N. and Deshpande, Aparna and Thete, Aniket R. and Pasricha, Renu and Kulkarni, Sulabha K. and Harani, Santosh K.} } @article { ISI:000257321700001, title = {Poly(4-methyl-1-pentene)/MWNT nanocomposites}, journal = {E-Polymers}, year = {2008}, month = {JUL}, pages = {079}, publisher = {EUROPEAN POLYMER FEDERATION}, address = {1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCE}, abstract = {

Nanocomposites of poly(4-methyl-1-pentene) (PMP) with various weight fractions of multiwall carbon nanotubes (MWNT{\textquoteright}s) were prepared by melt compounding. The nanocomposites are characterized for structure using scanning electron microscopy. The viscoelastic behavior of the nanocomposites is investigated in solid as well as melt state. The study reveals a significant increase in storage modulus especially in the rubbery regime of the polymer matrix and reduced tan delta. Rheological properties in melt show that the complex viscosity and shear storage modulus are increased as a result of incorporation of MWNT. A systematic decrease in the cross over frequency is noted which is attributed to the increased relaxation time. In dielectric analysis, composition dependent enhanced permittivity and conductivity are observed. The thermal stability of the polymer is found to be significantly improved in presence of MWNT{\textquoteright}s.

}, issn = {1618-7229}, author = {Patil, Prashant A. and Wanjale, Santosh D. and Jog, Jyoti Prakash} } @article { ISI:000253014400014, title = {Protection of oligo deoxynucleotides against nuclease degradation through association with self-assembling peptides}, journal = {Biomaterials}, volume = {29}, number = {8}, year = {2008}, month = {MAR}, pages = {1099-1108}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Aggregates of the self-assembling peptide EAK16II or EAK16IV and oligodeoxynucleotides (ODNs) were prepared, and their stability upon diluting the solution was investigated by UV-vis spectroscopy. The aggregates prepared at pH 4 and pH 7 did not dissociate after the solution was diluted 5- and 10-fold. The resistance against Escherichia coli exonuclease I of the ODN located in the EAK-ODN aggregates was studied by fluorescence resonance energy transfer (FRET) after the ODN had aggregated with EAK 16II or EAK 16IV at pH 4 or pH 7. The effect that the peptide sequence, peptide concentration, pH, and centrifugation had on protecting the aggregated ODN against nuclease degradation was investigated. Significant nuclease resistance was obtained after the EAK-ODN aggregates had been prepared at pH 4, with an EAK16IV concentration greater than a threshold value, and ensuring that the solution was not centrifuged immediately after sample preparation. Centrifuging the EAK16IV-ODN solution immediately after sample preparation resulted in the loss of this nuclease protection. However, if the solution of EAK-ODN aggregates was centrifuged 24h after sample preparation, the nuclease protection afforded by the EAK16IV-ODN aggregates to the ODN was maintained even after being subject to a 10-fold dilution and up to 4 rounds of centrifugation over 4 days. (c) 2007 Elsevier Ltd. All rights reserved.

}, keywords = {aggregate, centrifugation, Fluorescence resonance energy transfer (FRET), nuclease resistance, oligonucleotide, self-assembling peptide}, issn = {0142-9612}, doi = {10.1016/j.biomaterials.2007.10.049}, author = {Wang, M. and Adikane, H. V. and Duhamel, J. and Chen, P.} } @article { ISI:000257694300013, title = {Rapid extraction and separation of indium(III) with a high molecular weight amine}, journal = {Indian Journal of Chemical Technology}, volume = {15}, number = {3}, year = {2008}, month = {MAY}, pages = {291-297}, publisher = {NATL INST SCIENCE COMMUNICATION}, address = {DR K S KRISHNAN MARG, NEW DELHI 110 012, INDIA}, abstract = {

The liquid-liquid extraction of indium(III) from sodium succinate media using n-octylaniline in toluene as an extractant was studied. Quantitative extraction of indium(III) was observed in the range of 0.004-0.0075 M sodium succinate at pH 3.8-6.0 with 4\% n-octylaniline in toluene. Indium(III) was completely stripped from the metal loaded organic phase of the extractant with water and determined complexometrically. The stoichiometry of the extracted species was determined on the basis of;slope analysis. The extraction was found to proceed by a ion-pair mechanism with the extracted species being [RNH3+In(succinate)(2)(-)](org). Separation of indium(III) was carried out from some associated metals like Tl(I), Mg(II), Ni(II), Cu(II), Zn(II),. Cd(II), Hg(II), Pb(II), GC(IV), Sb(III), Bi(III). The selectivity of the extraction of indium(III) can also be achieved by use of a suitable masking agent for estimation and determination from the synthetic mixture corresponding to alloy to show the practical utility of the extractant.

}, keywords = {Indium(III), n-octylaniline, Separation, solvent extraction, succinate}, issn = {0971-457X}, author = {Shilmkar, T. N. and Kolekar, S. S. and Wadgaonkar, P. P. and Anuse, Mansing A.} } @article { ISI:000255421300007, title = {Rapid liquid-liquid extraction of thallium(III) from succinate media with 2-octylaminopyirdine in chloroform as the extractant}, journal = {Journal of the Serbian Chemical Society}, volume = {73}, number = {4}, year = {2008}, month = {JAN}, pages = {435-451}, publisher = {SERBIAN CHEMICAL SOC}, address = {KARNEGIJEVA 4, PO BOX 462, YU-11001 BELGRADE, YUGOSLAVIA}, abstract = {

A simple solvent extraction study of thallium(III) was conducted. Selective and quantitative extraction of thallium(III) by 2-octylaminopyridine (2-OAP) in chloroform occurred from aqueous sodium succinate medium (0.0075 M) at pH 3.0. Thallium(III) was back extracted with acetate buffer (pH 4.63). The effect of the concentration of succinate and 2-OAP, the role of various diluents, stripping agents, loading capacity of 2-OAP, equilibrium time and aqueous:organic volume ratio on the extraction of thallium(III) was studied. The stoichiometry of the extracted species was determined based on the slope analysis method and found to be 1: 2: 1 (metal: acid: extractant). The temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions Delta H, Delta G and Delta S for the extraction reaction. The method is free from interference of a large number of cations and anions. The method was used for the selective extraction of thallium(III) from its binary mixture with Zn(II), Cd(II), Hg(II), Bi(ill), Pb(II), Se(IV), Te(IV), Sb(III), Ga(III), In(III), AI(III), TI(I) and Fe(III). The proposed method was applied to the synthetic mixtures and alloys. It is simple, selective, rapid and eco-friendly.

}, keywords = {2-OAP, liquid-liquid extraction, succinate media, Temperature effect, thallium(III)}, issn = {0352-5139}, doi = {10.2298/JSCO804435M}, author = {Mahamuni, Sandip V. and Wadgaonkar, Prakash P. and Anuse, Mansing A.} } @article { ISI:000256183700006, title = {Sulfamic acid: an efficient and cost-effective solid acid catalyst for the synthesis of alpha-aminophosphonates at ambient temperature}, journal = {Catalysis Communications}, volume = {9}, number = {9}, year = {2008}, month = {MAY}, pages = {1822-1826}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Sulfamic acid catalyzed solvent-free protocol has been developed for the synthesis of alpha-aminophosphonates by three component condensation between aldehydes, amines and diethyl phosphite at ambient temperature. (C) 2008 Elsevier B.V. All rights reserved.

}, keywords = {alpha-Aminophosphonates, diethylphosphite (DEP), solid acid catalyst, Solvent-free, sulfamic acid (SA)}, issn = {1566-7367}, doi = {10.1016/j.catcom.2008.02.011}, author = {Mitragotri, Satish D. and Pore, D. M. and Desai, Uday V. and Wadgaonkar, P. P.} } @article { ISI:000260062900021, title = {Synthesis and self-assembling properties of alpha,omega-hydroxy-poly(ethylene oxide) end-capped with 1-isocyanato-3-pentadecylcyclohexane}, journal = {Polymer}, volume = {49}, number = {21}, year = {2008}, month = {OCT}, pages = {4635-4646}, publisher = {ELSEVIER SCI LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

A novel hydrophobic compound, 1-isocyanato-3-pentadecylcyclohexane (PDC) issued from a renewable resource material (Cashew Nut Shell Liquid), is used to end-cap poly(ethylene oxide) (PEO) of different molecular weights. The synthesis, characterization and self-assembling properties of these new associating polymers are reported. In aqueous solution, PDC modified PEOs self-associate into micellar structures which are characterized by neutron scattering. Using a star-polymer model with sticky hard sphere interactions, it is shown that the characteristics of the micelles mainly depend on the size of the PEO chain. In the case of PDC stickers, the aggregation number decreases from 25 to 17 with increasing molecular weight of PEO, from 10 to 20 kg/mol, respectively. The temperature directly impacts the interaction potential between the hydrophilic coronas of PEO which become less repulsive with increasing temperature. Rheological measurements, performed in dilute solution, clearly demonstrate that PEO micelles self-associate into open supramolecular structures. The correlation length of these loose clusters increases with polymer concentration and the hierarchical self-assembly follows the rules of the percolation theory. The sol/gel transition takes place at the overlap concentration of clusters. In semi-dilute solution, the viscoelastic properties of PDC end-capped PEOs are well described by the Maxwell model with a single relaxation mode. The characteristic time of the network follows an Arrhenius temperature dependence with an activation energy of 70 kJ/mol, in very good agreement with the size of PDC stickers. (C) 2008 Elsevier Ltd. All rights reserved.

}, keywords = {Associating polymer, Hydrophobically end-capped, poly(ethylene oxide), Star micelles}, issn = {0032-3861}, doi = {10.1016/j.polymer.2008.07.064}, author = {Kadam, Vijay S. and Badiger, Manohar V. and Wadgaonkar, Prakash P. and Ducouret, Guylaine and Hourdet, Dominique} } @article { ISI:000260095800003, title = {Synthesis of substituted styrenes and stilbenes mediated by palladium on zirconia}, journal = {Journal of Chemical Research-S}, number = {9}, year = {2008}, month = {SEP}, pages = {495-499}, publisher = {SCIENCE REVIEWS LTD}, type = {Article}, address = {PO BOX 314, ST ALBANS AL1 4ZG, HERTS, ENGLAND}, abstract = {

Palladium on zirconia has been found to be an effective catalyst for the synthesis of various substituted styrenes and stilbenes, including biologically active natural products, by reaction of aryl halides with olefins.

}, keywords = {heterogeneous catalyst, palladium on zirconia, stilbenes, styrenes}, issn = {0308-2342}, doi = {10.3184/030823408X340807}, author = {Borate, Hanumant B. and Dumbre, Deepa K. and Wakharkar, Radhika D. and Choudhary, Vasant R.} } @article { ISI:000257016800018, title = {Titania supported silicotungstic acid: an efficient solid acid catalyst for veratrole acylation}, journal = {Catalysis Communications}, volume = {9}, number = {10}, year = {2008}, month = {JUN}, pages = {2026-2029}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Titania supported silicotungstic acid (STA) with different STA loading (10-25 wt\%) and calcination temperature (650-750 degrees C) were prepared by wet impregnation method. The catalysts have been represented by a general formula xSTiO(2)y (where x denotes wt\%, S denotes STA and y denotes calcination temperature in degrees C). These catalysts were characterized by techniques such as X-ray diffraction, surface analysis, FTIR-pyridine and TPD-NH(3) and were used as heterogeneous solid acid catalysts in the liquid phase acylation of veratrole with acetic anhydride (Ac(2)O). It was found that 20STiO(2)700 gave the highest activity in acylation reaction due to its highest acidity. (C) 2008 Elsevier B.V. All rights reserved.

}, keywords = {acetic anhydride, Acylation, Silicotungstic acid, titania, veratrole}, issn = {1566-7367}, doi = {10.1016/j.catcom.2008.03.043}, author = {Waghmare, Nilesh G. and Kasinathan, Palraj and Amrute, Amol P. and Lucas, Nishita and Halligudi, Shivaraj B.} } @article { ISI:000266693600015, title = {Ammonium metavanadate: an effective catalyst for synthesis of alpha-hydroxyphosphonates}, journal = {Arkivoc}, year = {2009}, month = {DEC}, pages = {138-148}, publisher = {ARKAT USA INC}, address = {C/O ALAN R KATRITZKY, UNIV FLORIDA, DEPT CHEMISTRY, PO BOX 117200, GAINESVILLE, FL 32611 USA}, abstract = {

Ammonium metavanadate (NH(4)VO(3)) is an inexpensive, efficient and mild catalyst for the synthesis of alpha-hydroxyphosphonate derivatives by the reaction of various aryl or heteroaryl aldehydes with triethylphosphite at room temperature. This method affords the alpha-hydroxyphosphonates in short reaction times, under solvent-free conditions, and in high yield.

}, keywords = {Aldehyde, alpha-hydroxyphosphonate, Ammonium metavanadate (NH(4)VO(3)), Solvent-free, Triethyl phosphite}, issn = {1424-6376}, author = {Sonar, Swapnil S. and Kategaonkar, Amol H. and Ware, Madhav N. and Gill, Charansingh H. and Shingate, Bapurao B. and Shingare, Murlidhar S.} } @article { ISI:000271309400016, title = {CNS Depressant activity of ethanol extract of sterculia guttata seeds in mice}, journal = {Indian Journal of Pharmaceutical Sciences}, volume = {71}, number = {4}, year = {2009}, month = {JUL}, pages = {445-U167}, publisher = {MEDKNOW PUBLICATIONS}, address = {A-108-109 KANARA BUSINESS CENTRE, GHAKTOPAR, MUMBAI, 400075, INDIA}, abstract = {

Shade dried, powdered seeds of Sterculia guttata were extracted using a Soxhlet extractor with ethanol. Ethanol was removed under reduced pressure and dried to obtained crude extract. This extract was evaluated for its effect on behavioral changes, exploratory activity and barbiturate-sleeping time, using appropriate standard methods in mice. The extract exhibited dose-dependent CNS depressant activity.

}, keywords = {Barbitone sodium, CNS depressant activity, pentobarbitone sodium, Sterculia guttata Roxb., Swiss albino mice}, issn = {0250-474X}, author = {Katade, S. R. and Misar, Ashwini V. and Mujumdar, Arvind M. and Phalgune, U. D. and Wakharkar, R. D. and Deshpande, N. R.} } @article { ISI:000265030200054, title = {Comparing ultraviolet and chemical reduction techniques for enhancing photocatalytic activity of silver oxide/silver deposited nanocrystalline anatase titania}, journal = {Journal of Physical Chemistry C}, volume = {113}, number = {15}, year = {2009}, month = {APR}, pages = {6243-6255}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Silver oxide/silver have been deposited, with varying silver concentration (0.01-10 mol \%), on the surface of sol-gel derived nanocrystal line anatase titania using two different techniques, namely the ultraviolet reduction and chemical reduction (using stannous ions). The pure and silver oxide/silver-deposited nanocrystalline anatase titania have been characterized for their morphology, average nanocrystal lite size, specific surface area, phases involved, surface chemistry, band gap, and photoluminescence using various analytical techniques, such as scanning electron microscopy, transmission electron microscopy, Brunauer, Emmett, and Teller surface-area measurement, X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet-visible spectrophotometry, and spectrofluorometry, respectively. The photocatalytic activity of pure and silver oxide/silver-deposited nanocrystalline anatase titania has been measured by monitoring the degradation of methylene blue dye in an aqueous solution under ultraviolet-radiation exposure. Within the investigated Ag-concentration range, the maximum photocatalytic activity has been observed for 0.1 and 10 mol \% Ag for the chemical-reduction (using stannous ions) and ultraviolet-reduction methods with the corresponding apparent first-order reaction-rate constant (k(app)) values of 0.228 and 0.151 min(-1), which are 3.5 and 2.3 times larger than that of pure nanocrystalline anatase fitania (0.065 min(-1)). The chemical-reduction method (using stannous ions), hence, appears to be more effective than the ultraviolet-reduction method for enhancing the photocatalytic activity of nanocrystalline anatase titania. Various factors such as the surface concentration of superoxide ions, oxygen-ion vacancies, and stannous ions as well as the amount of silver oxide/silver and tin oxide are observed to control the surface-adsorption of methylene blue and photoinduced electron/hole lifetime and, hence, variation in the photocatalytic activity as a function of silver concentration.

}, issn = {1932-7447}, doi = {10.1021/jp8105343}, author = {Priya, R. and Baiju, K. V. and Shukla, S. and Biju, S. and Reddy, M. L. P. and Patil, K. and Warrier, K. G. K.} } @article { ISI:000262440400015, title = {Composites of plasma treated poly(etherimide) films with gold nanoparticles and lysine through layer by layer assembly: a {\textquoteleft}{\textquoteleft}friendly-rough{\textquoteright}{\textquoteright} surface for cell adhesion and proliferation for tissue engineering applications}, journal = {Journal of Materials Chemistry}, volume = {19}, number = {4}, year = {2009}, month = {DEC}, pages = {544-550}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A composite film fabricated by plasma treated poly(etherimide) with subsequent deposition of gold nanoparticles and lysine using layer by layer assembly has been demonstrated to be good for cell attachment and proliferation making it an attractive strategy for tissue engineering applications. As compared to the other methods the decrease in contact angle obtained here does not depend much on the plasma treatment thus affecting the polymer structure minimally. A combination of surface roughness provided by the gold nanoparticles and the presence of amine groups of lysine is hypothesized to be the reason for the features observed.

}, issn = {0959-9428}, doi = {10.1039/b817231e}, author = {D{\textquoteright}Britto, Virginia and Tiwari, S. and Purohit, V. and Wadgaonkar, P. P. and Bhoraskar, S. V. and Bhonde, Ramesh R. and Bhagavatula L. V. Prasad} } @article { ISI:000271238900017, title = {Concurrent In-situ formation of Ag/Ag2S nanoparticles in polymer matrix by facile polymer-inorganic solid state reaction}, journal = {Journal of Nano Research}, volume = {5}, year = {2009}, month = {JAN}, pages = {143-152}, publisher = {TRANS TECH PUBLICATIONS LTD}, address = {LAUBISRUTISTR 24, STAFA-ZUERICH, CH-8712, SWITZERLAND}, abstract = {

We herein report the feasibility of polymer-inorganic solid-state reaction route for simultaneous in situ generation of Ag \& Ag2S nanostructures in polymer network wherein an engineering thermoplastic, polyphenylene sulphide (PPS), itself acts as a chalcogen source as well as a stabilizing matrix for the resultant nanoproducts. Typical solid-state reaction was accomplished by simply heating the physical admixture of the two reactants i.e. AgNO3 and PPS by varying molar ratios mainly 1:1, 1:5, 1:15, 1:20, at the crystalline melting temperature (285 degrees C) of PPS. The synthesized nanoparticles were characterized by various physico-chemical techniques like X-ray Diffractometry, Scanning Electron Microscopy equipped with EDAX, Transmission Electron Microscopy and UV-Visible spectroscopy. The prima facie observations suggest the effective formation and subsequent entrapment of mainly nanocrystalline metallic silver (fcc) in PPS matrix for all the molar ratios chosen for the reaction. Additionally, simultaneous occurrence of nanocrystalline Ag2S (monoclinic phase) is also noticed in case of heated admixture of AgNO3: PPS with equimolar ratio. The TEM analysis reveals nanoscale polydispersity (5nm to 70nm) and prevalence of mainly spherical morphological features in all the cases with occasional indications of triangular and hexagonal morphological features depending upon the reaction molar ratio.

}, keywords = {Ag, Ag2S, Nanoparticles, Polymer inorganic solid -state reaction, Thermoplastic polymer matrix}, issn = {1662-5250}, doi = {10.4028/www.scientific.net/JNanoR.5.143}, author = {Waghmare, Sujata and Shinde, Manish and Gholap, Ramkrishna S. and Rao, N. Koteswara and Hawaldar, Ranjit R. and Mulik, Uttam P. and Amalnerkar, Dinesh P.} } @article { ISI:000267509500004, title = {Electronic manifestation of cation-vacancy-induced magnetic moments in a transparent oxide semiconductor: anatase Nb:TiO2}, journal = {Advanced Materials}, volume = {21}, number = {22}, year = {2009}, month = {JUN}, pages = {2282+}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

Nb-doped anatase TiO2 thin films grown by pulsed-laser deposition show Kondo scattering in elctronic-transport measurements, providing evidence for the formation of magnetic moments. The origin of magnetism is attributed to cation (Ti) vacancies, confirmed by X-ray absorption spectroscopy and first-principle calculations. The Ti vacancies are controlled by oxygen partial pressure during growth.

}, issn = {0935-9648}, doi = {10.1002/adma.200803019}, author = {Zhang, Shixiong and Ogale, Satishchandra B. and Yu, Weiqiang and Gao, Xingyu and Liu, Tao and Ghosh, Saurabh and Das, Gour P. and Wee, Andrew T. S. and Greene, Richard L. and Venkatesan, Thirumalai} } @article { ISI:000263070700020, title = {Enhanced solar-radiation induced photocatalytic activity of surface-modified nanocrystalline anatase-titania}, journal = {Catalysis Letters}, volume = {128}, number = {1-2}, year = {2009}, month = {MAR}, pages = {137-143}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

Sol-gel derived pure nanocrystalline (similar to 20-30 nm) anatase-titania has been surface-modified by depositing silver(I) oxide and silver (predominantly the former) via UV-reduction process. The pure and surface-modified nanocrystalline anatase-titania have been characterized using different analytical techniques for determining the average nanocrystallite size, phase-contents, surface-chemistry, as well as the absorption and photoluminescence characteristics. It is demonstrated that, the latter exhibits an enhanced solar-radiation induced photocatalytic activity as compared to that of the former as a result of the absorption in the visible-region and enhanced photo-induced e(-)/h(+) life-time, both caused by the surface-deposition of silver(I) oxide and silver.

}, keywords = {Nanocrystalline, Photocatalysis, Silver, sol-gel, titania, UV-reduction}, issn = {1011-372X}, doi = {10.1007/s10562-008-9704-1}, author = {Priya, R. and Baiju, K. V. and Shukla, S. and Biju, S. and Reddy, M. L. P. and Patil, K. R. and Warrier, K. G. K.} } @article {42757, title = {Functional delivery of siRNA in mice using dendriworms}, journal = {ACS Nano}, volume = {3}, year = {2009}, month = {SEP}, pages = {2495-2504}, doi = {10.1021/nn900201e}, author = {Agrawal, Amit C. and Min, Dal-Hee and Singh, Neetu and Zhu, Haihao and Birjiniuk, Alona and von Maltzahn, Geoffrey and Harris, Todd J. and Xing, Deyin and Woolfenden, Stephen D. and Sharp, Phillip A. and Charest, Alain and Bhatia, Sangeeta N.} } @article { ISI:000265515400019, title = {Green and sustainable approach to BIS-(INDOLYL) alkanes}, journal = {Indian Journal of Heterocyclic Chemistry}, volume = {18}, number = {3}, year = {2009}, month = {JAN}, pages = {279-282}, publisher = {DR R S VARMA}, address = {C-85 SECTOR-B, ALIGANJ SCHEME, LUCKNOW, INDIA 226020 USA}, abstract = {

An efficient, high yielding, green and mild method has been developed for the synthesis of bis (indolyl) methanes using dodecylsulphonic acid as an effective surfactant type Bronsted acid catalyst in aq media. The method is excellent for various new bis-(indolyl) methanes derived from pyrazolaldehydes.

}, issn = {0971-1627}, author = {Gholap, Somnath S. and Wakchaure, Prasad B. and Pandhare, Gajanan R. and Gill, Charansingh H.} } @article { ISI:000264925400047, title = {Novel electroless process for copper coating of flyash using titania/ultraviolet-radiation/metal catalyst-system}, journal = {Applied Surface Science}, volume = {255}, number = {13-14}, year = {2009}, month = {APR}, pages = {6696-6704}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A novel electroless process has been demonstrated in this investigation to coat the surface of flyash particles with a conducting metal such as copper. The conventional electroless process has been modified for this purpose by replacing the tin-palladium catalyst-system with the titania/ultraviolet-radiation/metal catalyst-system, where the metal is either copper or silver as demonstrated here. The mechanism of copper coating of flyash particles in an electroless bath, using the novel methods of surface-sensitization and surface-activation, has been systematically studied by monitoring changes in the surface-morphology, surface-chemistry, and surface-structure of flyash particles using the scanning electron microscope, energy dispersive analysis of X-rays, X-ray photoelectron spectroscope, and X-ray diffraction. It has been revealed that the novel electroless method involves coating the flyash particles with titania photocatalyst via sol-gel, which acts as a surface-sensitizer under the ultraviolet-radiation exposure for the subsequent surface-activation with the copper- or silver-clusters. The latter in turn acts as surface-catalyst for the subsequent Cu-coating in an electroless bath. The proposed mechanism of surface-sensitization and surface-activation of flyash particles using the novel catalyst-system has been compared with that using the conventional catalyst-system. (C) 2009 Elsevier B. V. All rights reserved.

}, keywords = {Copper, Electroless, Flyash, Photocatalysis, sol-gel, titania}, issn = {0169-4332}, doi = {10.1016/j.apsusc.2009.02.066}, author = {Shijitha, T. and Baiju, K. V. and Shukla, S. and Patil, K. and Warrier, K. G. K.} } @article { ISI:000264095500002, title = {Parametric dependence studies on cracking of clay}, journal = {Physica A-Statistical Mechanics and its Applications}, volume = {388}, number = {8}, year = {2009}, month = {APR}, pages = {1352-1358}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

We have studied the shrinkage-crack patterns formed in the process of drying of clay/water slurries employing simple laboratory experiments. Both isotropic and directional drying was studied. The objective has been to examine the correlation between the solvent, materials parameters and the crack patterns. Attempt is made to fit the observations to specific models. The dynamics of the pattern formation process and the geometric properties of the crack patterns are found to be in conformity with the hydrodynamic model by Lee and Routh [W.P. Lee, A.F. Routh, Langmuir 20 (2004) 9887]. (C) 2008 Elsevier B.V. All rights reserved.

}, keywords = {clay, Cracks pattern, Hydrodynamic model}, issn = {0378-4371}, doi = {10.1016/j.physa.2008.12.039}, author = {Pasricha, Kanika and Wad, Uday and Pasricha, Renu and Ogale, Satishchandra} } @article { ISI:000263332200056, title = {Polyimides based on aromatic diisocyanates containing pendent flexible alkoxy chains and aromatic dianhydrides: synthesis, characterization, and liquid-crystal alignment properties}, journal = {Journal of Applied Polymer Science}, volume = {112}, number = {1}, year = {2009}, month = {APR}, pages = {461-472}, publisher = {JOHN WILEY \& SONS INC}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Four new aromatic diisocyanates containing pendent flexible alkoxy chains, namely, 5-butyloxy-1,3-phenylenediisocyanate, 5-octyloxy-1,3-phenylenediisocyanate, 5-dodecyloxy-1,3-phenylenediisocyanate, and 5-hexadecyloxy-1,3-phenylenediisocyanate, were synthesized by Curtius rearrangement of the corresponding 5-alkoxy-1,3-phenylene diacylazides. These diisocyanates were each polycondensed with three commercially available aromatic dianhydrides: 4,4{\textquoteright}-oxydiphthalic anhydride, 3,3{\textquoteright},4,4{\textquoteright}-(hexafluoroisopropylidene) diphthalic anhydride, and 3,3{\textquoteright},4,4{\textquoteright}-benzophenonetetracarboxylic dianhydride-in benzonitrile in the presence of 1,4-dizabicyclo[2.2.2]octane as a catalyst to obtain a series of polyimides with inherent viscosities in the range 0.16-0.43 dL/g. Except for 3,3{\textquoteright},4, 4{\textquoteright}-benzophenonetetracarboxylic dianhydride based polyimides, all of the polyimides were found to be soluble in dichloromethane, m-cresol, 1-methyl-2-pyrrolidinone, tetra-chloroethane, and pyridine either at room temperature or on heating and could be cast into tough, flexible, transparent films from a solution in in-cresol or tetra chloroethane. X-ray diffractograms revealed that the polyimides with longer alkoxy chains had layered structures. The glass-transition temperature of the polyimides containing pendent flexible alkoxy chains were in the range 159-246 degrees C as measured by differential scanning calorimetry. The temperature for the 10\% weight loss of the polyimides was in the range 410-460 degrees C in a nitrogen atmosphere, which indicated good thermal stability. A pretilt angle of 2.97 degrees was observed for the polyimide derived from 5-octyloxy-1,, 3-phenylenediisocyanate and 4,4{\textquoteright}-oxydiphthalic anhydride. (c) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 461-472, 2009

}, keywords = {High performance polymers, polyimides, Thermal properties}, issn = {0021-8995}, doi = {10.1002/app.29388}, author = {Sarkar, Anjana and Halhalli, Mahadeo R. and Kulkarni, Arun D. and Wadgaonkar, Prakash P.} } @article {42456, title = {Polymeric ladderphanes}, journal = {Journal of the American Chemical Society}, volume = {131}, year = {2009}, month = {AUG}, pages = {12579{\textendash}12585}, abstract = {

A new class of polymers, which have a double-stranded polybinorbornene skeleton with multilayer planar oligoaryl linkers, defined as polymeric ladderphanes, are synthesized. The structures of these ladderphanes are determined by spectroscopic means. Photophysical studies and time-resolved fluorescence spectroscopic investigations reveal that there is a strong interaction between the chromophore linkers. Thus, Soret band splitting in the absorption spectrum of the polymer with porphyrin linker (12e), significant fluorescence quenching with oligoaryl linkers (12b-d), and excimer emission with a terphenylene-diethynylene linker (12a) are characteristic photophysical properties of these polymers. Scanning tunneling microscopy shows that polymers 12b and d exhibit a ladder-like morphology and form a supramolecular assembly leading to a two-dimensional ordered array on a highly oriented pyrolytic graphite surface.

}, doi = {10.1021/ja9035362}, author = {Chou, Chih-Ming and Lee, Shern-Long and Chen, Chih-Hsien and Biju, Akkattu T. and Wang, Hsian-Wen and Wu, Yi-Lin and Zhang, Guo-Fu and Yang, Kuang-Wei and Lim, Tsong-Shin and Huang, Min-Jie and Tsai, Po-Yu and Lin, Kin-Chuan and Huang, Shou-Ling and Chen, Chun-hsien and Luh, Tien-Yau} } @article { ISI:000263939200021, title = {Solvent extraction of trivalent indium from succinate solution by 2-octylaminopyridine in chloroform}, journal = {Journal of the Iranian Chemical Society}, volume = {6}, number = {1}, year = {2009}, month = {MAR}, pages = {200-212}, publisher = {IRANIAN CHEMICAL SOC}, address = {NO 7, MARAGHEH ST, OSTAD NEJATOLLAHI AVE, PO BOX 15875-1169, TEHRAN, 00000, IRAN}, abstract = {

Extraction processes of indium(III) with 2-octylaminopyridine (2-OAP) from media of various complexing ability, succinate and salicylate, in chloroform have been elucidated. The ion-pair complex has also quantitative extraction in xylene and 1,2-dichloroethane. Indium(III) from organic phase was stripped with 1.0 M hydrochloric acid and determined complexometrically with EDTA. The stoichiometry of the extracted species was found out on the basis of slope analysis. The extraction of indium(III) proceeds by an anion exchange mechanism and the extracted species is [RR{\textquoteright}NH(2)(+)In(succinate)(2)(-)]((org)). Temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions (Delta H, Delta G and Delta S) for extraction reaction. It is possible to separate indium(III) from Zn(II), Cd(II), Pb(II), Hg(II), Bi(III), Tl(I), Tl(III), Ga(III), Al(III), Te(IV), Se(IV), Sb(III), Fe(III) and Sn(IV). The method is simple, rapid and reproducible and can be used to determine the indium from samples like alloys.

}, keywords = {2-OAP, Binary separations, Indium(III), liquid-liquid extraction, Sodium succinate}, issn = {1735-207X}, author = {Mahamuni, Sandip V. and Kolekar, S. S. and Wadgaonkar, P. P. and Anuse, Mansing A.} } @article { ISI:000264648900011, title = {Stereoselective synthesis of (+)-isoindolo-beta-carboline}, journal = {Tetrahedron-Asymmetry}, volume = {20}, number = {2}, year = {2009}, month = {FEB}, pages = {220-224}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Starting from homophthalic anhydride and (S)-tryptophan, the stereoselective synthesis of (+)-isoindolo-beta-carboline has been described via the corresponding homophthalimide, its chemoselective oxidative ring contraction, and the intramolecular dehydrative ring closure followed by a geometry-specific demethoxycarbonylation. (C) 2009 Elsevier Ltd. All rights reserved.

}, issn = {0957-4166}, doi = {10.1016/j.tetasy.2009.01.001}, author = {Wakchaure, Prasad B. and Puranik, Vedavati G. and N. P. Argade} } @article { ISI:000263629200030, title = {Synthesis and characterization of new polyimides containing pendent pentadecyl chains}, journal = {European Polymer Journal}, volume = {45}, number = {2}, year = {2009}, month = {FEB}, pages = {582-589}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A new unsymmetrical aromatic diamine, viz., 4-pentadecylbenzene-1,3-diamine was synthesized through a series of reaction steps starting from 3-pentadecylphenol. 4-Pentadecylbenzene-1,3-diamine was employed to synthesize a series of new polyimides by one-step polycondensation in m-cresol with four commercially available aromatic dianhydrides. viz., 3,3{\textquoteright},4,4{\textquoteright}-biphenyltetracarboxylic dianhydride (BPDA), 3,3{\textquoteright},4,4{\textquoteright}-benzophenone-tetracarboxylic dianhydride (BTDA), 4,4{\textquoteright}-oxydiphthalic anhydride (ODPA) and 4,4{\textquoteright}-(hexafluoroisopropylidene)diphthalic anhydride (6-FDA). Inherent viscosities of resulting polyimides were in the range 0.33-0.67 dL/g and number average molecular weights were in the range 14,700-52,200 (GPC, polystyrene standard). Polyimides containing pendent pentadecyl chains were soluble in organic solvents such as chloroform, m-cresol, N,N-dimethylacetamide (DMAc), 1-methyl-2-pyrrolidinone (NMP), pyridine and nitrobenzene. Strong and flexible films of polyimides could be cast from their chloroform solutions. Polyimides exhibited glass transition temperature in the range 158-206 degrees C. The temperature at 10\% wt. loss (T(10)). determined by TGA in nitrogen atmosphere, of polyimides was in the range 470-480 degrees C indicating good thermal stability. (C) 2008 Elsevier Ltd. All rights reserved.

}, keywords = {Cashew nut shell liquid, Glass transition temperature, Pendant pentadecyl chain, polyimides}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2008.11.013}, author = {Sadavarte, Nilakshi V. and Halhalli, Mahadeo R. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article { ISI:000272522300034, title = {Synthesis and properties of new polybenzoxazines containing (substituted) cyclohexyl moieties}, journal = {Polymers for Advanced Technologies}, volume = {20}, number = {12}, year = {2009}, month = {DEC}, pages = {1107-1113}, publisher = {JOHN WILEY \& SONS LTD}, address = {THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND}, abstract = {

A series of new polybenzoxazines were synthesized based on diphenols containing (substituted) cyclohexyl moiety and were characterized by FT-IR, (1)H-NMR, and (13)C-NMR spectroscopy. These new benzoxazine monomers exhibited better processability with lower peak cure temperature and a wide cure controllable window (CCW) as manifested in differential scanning calorimetric analysis. The cure analysis was performed by FT-IR spectroscopy. Glass transition temperature of new polybenzoxazines varied from 170 to 205 degrees C. The cyclohexyl bridge groups facilitated ring opening, resulting in polymer with improved thermal stability in comparison to bisphenol A-based benzoxazine as assessed by the various thermal analyses. The water contact angles of polybenzoxazines containing (substituted) cyclohexyl moieties were higher than that of bisphenol A-based polybenzoxazine, implying their higher hydrophobicity. Copyright (C) 2009 John Wiley \& Sons, Ltd.

}, keywords = {Hydrophobicity, polybenzoxazines, thermally stable polymers}, issn = {1042-7147}, doi = {10.1002/pat.1370}, author = {Kumar, K. S. Santhosh and Nair, C. P. Reghunadhan and Ninan, K. N. and Kulkarni, A. D. and Wadgaonkar, P. P.} } @article { ISI:000271108500027, title = {Synthesis and thermal properties of soluble silicon containing phenylated aromatic-aliphatic polyamides}, journal = {Journal of Thermal Analysis and Calorimetry}, volume = {98}, number = {2}, year = {2009}, month = {NOV}, pages = {539-545}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

Aromatic polyamides find many applications in diverse and critical areas due to their high thermal stability coupled with high mechanical properties. However most of such aramides are difficult to fabricate because of their limited solubility and high melting temperature. Improvements in processability have been reported by incorporating bulky pendant groups and aliphatic spacer groups. Similarly to improve the solubility of polymers approaches of incorporating silicon in main polymer chain and co-polymerization techniques were useful. We report the synthesis and characterization of a series of phenylated silicon containing aromatic-aliphatic polyamides from a mixture of 2, 5-bis (4-carboxy methylene phenyl)-3, 4-diphenyl thiophene (CMPDT) and bis-(4-carboxy phenyl) dimethyl silane (BCPDS) in various mole proportions, with commercial aromatic diamine. Thus a series of novel co-polyamides having pendant phenyl groups, methylene spacer and silicon moiety was prepared by judicious combination of (CMPDT); BCPDS and aromatic diamine; bis-(4-aminophenyl) ether (ODA), by direct polycondensation using Yamazaki{\textquoteright}s phosphorylation method. These high molecular mass polyamides were obtained in high (89-98\%) yields and had viscosities in the range of 0.23-0.57 dL/g in DMAc. Polyamides showed improved solubility in polar aprotic solvents, like NMP, DMAc, DMSO and DMF; had high thermal stability; with no mass loss below 335 A degrees C.

}, keywords = {2, 4-diphenyl thiophene, 5-bis (4-carboxy methylene phenyl)-3, bis-(4-amino phenyl) ether, bis-(4-carboxy phenyl) dimethyl silane, Copolyamides, solubility, thermal stability}, issn = {1388-6150}, doi = {10.1007/s10973-009-0286-y}, author = {Ghanwat, A. A. and Sayyed, M. M. and Wadgaonkar, P. P. and Maldar, Noormahamad N.} } @article { ISI:000264232900041, title = {Synthesis, characterization and constitutional isomerism study of new aromatic polyamides containing pendant groups based on asymmetrically substituted meta-phenylene diamines}, journal = {European Polymer Journal}, volume = {45}, number = {3}, year = {2009}, month = {MAR}, pages = {953-959}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Four new aromatic polyamides containing pendant groups were synthesized by low temperature interfacial polycondensation of two asymmetrically substituted diamine monomers, namely, 4-[4-(1-methyl-1-phenylethyl) phenoxyl-1,3-diamino benzene and 4-[4-[4-methylphenyl) sulphonyl]phenoxy)-1,3-diamino benzene with two aromatic diacid chlorides, namely isophthaloyl chloride and tereplithaloyl chloride. Inherent viscosities of polyamides were in the range 0.64-0.72 dL/g indicating formation of medium molecular weight polymers. The weight average molecular weights and number average molecular weights, determined by gel permeation chromatography (polystyrene standard), were in the range 54,500-65,000 and 19,750-27,000, respectively. The constitutional isomerism of synthesized polyamides was investigated by (1)H and (13)C NMR spectroscopy, where as the constitutional order was calculated from (1)H NMR spectroscopy and was found to be in the range 0.35-0.37. Polyamides containing pendant groups were essentially amorphous and were soluble in polar aprotic solvents such as N, N-dimethyl acetamide, N-methyl-2-pyrrolidone, N, N-dimethyl formamide and dimethyl sulfoxide. Polyamides exhibited glass-transition temperature in the range 237-254 degrees C. The initial decomposition temperature, determined by TGA in nitrogen atmosphere, of polyamides was in the range 371-410 degrees C indicating their good thermal stability. (C) 2008 Elsevier Ltd. All rights reserved.

}, keywords = {Asymmetrically substituted diamines, Constitutional isomerism, interfacial polycondensation, Pendant groups}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2008.11.034}, author = {Pal, Ravindra R. and Patil, Prashant S. and Salunkhe, Manikrao M. and Maldar, Noormahamad N. and Wadgaonkar, Prakash P.} } @article { ISI:000265911700183, title = {Synthesis, characterization and effect of sintering temperature on magnetic properties of MgNi ferrite prepared by co-precipitation method}, journal = {Journal of Alloys and Compounds}, volume = {475}, number = {1-2}, year = {2009}, month = {MAY}, pages = {926-929}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

Mixed MgNi ferrites with composition Mg(0.5)Ni(0.5)Fe(2)O(4) where the mole fraction for Ni (x = 0, 0.25, 0.75, 0.5 and 1) were prepared by following co-precipitation method at temperature 110 degrees C and maintaining a pH of solution equal to 9.5 enable to achieve large particle surface area. The resultant materials obtained in powder form were sintered at different temperatures. Thermogravimetry (TGA), X-ray diffraction (XRD) and scanning electron microscopy, technique were applied to obtain structural parameters. The XRD patterns reveal the presence of(311) peak as the most intense one. The intensity of XRD peak increases with increase in sintering temperature. The saturation magnetization values showed increasing trend with increase in sintering temperature from 2.37 to 29.76 emu/g. These results along with the analysis of SEM micrographs are interpreted in terms of increase in particle grain size with increase in sintering temperature. (C) 2008 Elsevier B.V. All rights reserved.

}, keywords = {Chemical synthesis, Ferrites, FT-IR, scanning electron microscopy, X-ray diffraction}, issn = {0925-8388}, doi = {10.1016/j.jallcom.2008.08.082}, author = {Hankare, P. P. and Jadhav, S. D. and Sankpal, U. B. and Chavan, Santosh S. and Waghmare, K. J. and Chougule, B. K.} } @article { ISI:000286307300007, title = {Synthesis of Sb-doped SnO2 nanowires and hyperbranched structures}, journal = {Science of Advanced Materials}, volume = {1}, number = {1}, year = {2009}, month = {APR}, pages = {38-43}, publisher = {AMER SCIENTIFIC PUBLISHERS}, address = {26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA}, abstract = {

Branched nanostructures of semiconducting materials are of great interest for their potential applications in optoelectronic, photonic devices and sensors. We herein describe a facile single-step chemical vapor deposition route for the synthesis of Sb-SnO2 hyperbranched nanostructures comprised of elongated nanowires with 30-40 nm diameter and 10-20 Am length. The morphology and structure has been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), selective area electron diffraction (SAED), and powder X-ray diffraction (XRD). Also, a possible mechanism is proposed for the growth of nanowires into the hyperbranched form on the basis of the substrate effect, the role of Au nanoparticles, and the effect of Sb doping on specific morphology evolution. Interestingly, electrical conductivity measurements as a function of temperature suggest a semiconducting behavior, despite being governed by different electron-transport mechanisms with activation energies of 0.55 and 0.17 eV, which correspond to pure SnO2 and Sb-SnO2 nanowires, respectively. A precise control over the operating parameters not only envisages custom-designed, branched structures by a simple and economical route but also offers an alternative method to the expensive and tedious nanofabrication techniques for industrial applications.

}, keywords = {Au Nanoparticles, chemical vapor deposition, Sb-SnO2 Hyperbranched Nanostructures}, issn = {1947-2935}, doi = {10.1166/sam.2009.1006}, author = {Sathe, Bhaskar R. and Patil, Mrudula and Walke, Pravin S. and Vivek, J. P. and Lele, Ashish K. and Pillai, Vijayamohanan K. and Mulla, Imtiaz S.} } @article { ISI:000266382800011, title = {Synthesis of the reported protoberberine gusanlung D}, journal = {Synthesis-Stuttgart}, number = {10}, year = {2009}, month = {MAY}, pages = {1667-1672}, publisher = {GEORG THIEME VERLAG KG}, address = {RUDIGERSTR 14, D-70469 STUTTGART, GERMANY}, abstract = {

Starting from homopiperonylamine or phenethylamine with homophthalic anhydride or 3,4-methylenedioxyhomophthalic acid, respectively, facile syntheses of the reported structures of (+/-)-gusanlung D and (+/-)-isogusanlung d were accomplished via regioselective reductive dehydration of the corresponding homophthalimides followed by an intramolecular acid-catalyzed or radical cyclization pathway. Starting from the corresponding suitably ortho-halogenated homophthalimides, the syntheses of dehydrogusanlung and dehydroisogusanhing D were completed via regioselective reductive dehydration followed by an intramolecular Heck coupling reaction as the key steps. The analytical and spectral data obtained for all four synthetic compounds differed from the reported data for natural gusanling D, and therefore the structural assignment of the natural product needs to be revised.

}, keywords = {gusanlung D, Heck reaction, homophthalic anhydride, homopiperonyl amine, reductive dehydration}, issn = {0039-7881}, doi = {10.1055/s-0028-1088050}, author = {Wakchaure, Prasad B. and Easwar, Srinivasan and N. P. Argade} } @article { ISI:000284967000058, title = {Abrupt shear thickening of aqueous solutions of hydrophobically modified poly(N,N {\textquoteleft}-dimethylacrylamide-co-acrylic acid)}, journal = {Macromolecules}, volume = {43}, number = {23}, year = {2010}, month = {DEC}, pages = {10055-10063}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

We report some new and interesting observations on the abrupt and large shear-induced thickening of aqueous solutions of hydrophobically modified poly(N,N{\textquoteright}-dimethylacrylamide-co-acrylic acid). High molecular weight copolymer was prepared by free radical copolymerization of N,N{\textquoteright}-dimethylacrylamide [DMA] and acrylic acid [AA] and was subsequently modified to different extents using a hydrophobic compound, namely, 3-pentadecylcyclohexylamine [3-PDCA], which is derived from a renewable resource material, cashew nutshell liquid [CNSL]. The structural elucidation of the base copolymer and the hydrophobically modified copolymers was performed by (1)H and (13)C NMR spectroscopy. The zero shear viscosities [eta(0)] of the hydrophobically modified polymers were lower than that of the precursor poly(N,N{\textquoteright}-dimethylacrylamide-co-acrylic acid) until some critical polymer concentration, which increased with increase in hydrophobic modification. Above the critical concentrations, the eta(0) of the hydrophobically modified copolymers surpassed that of the precursor at the same concentration. At moderate shear rates some of these hydrophobically modified copolymers exhibited an abrupt shear-induced thickening in which the viscosity of the samples increased severalfold. We show here from creep experiments that thickening occurs only when the shear rate reaches a critical value, (gamma) over dot(crit), and that the thickened samples can be trapped in different metastable states by controlling the applied stress. Interestingly, the shear thickened samples showed further thickening upon decreasing the applied stress. Eventually, the metastable samples revert to their equilibrium states at characteristic time that depends on (small) probe stress.

}, issn = {0024-9297}, doi = {10.1021/ma1017378}, author = {Lele, Ashish K. and Shedge, Aarti and Badiger, Manohar V. and Wadgaonkar, Prakash and Chassenieux, Christophe} } @article {42742, title = {Chronic inflammatory responses to microgel-based implant coatings}, journal = {Journal of Biomedical Materials Research}, volume = {94A}, year = {2010}, month = {JUL}, pages = {252-258}, doi = {10.1002/jbm.a.32669}, author = {Bridges, Amanda W. and Whitmire, Rachel E. and Singh, Neetu and Templeman, Kellie L. and Babensee, Julia E. and Lyon, L. Andrew and Garcia, Andres J.} } @article { ISI:000284052600021, title = {Covalently immobilized triphenylphosphine rhodium complex: synthesis, characterization, and application in catalytic olefin hydrogenation}, journal = {Chemcatchem}, volume = {2}, number = {11}, year = {2010}, month = {NOV}, pages = {1477-1482}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

A trimethoxysilane functionalized triphenylphosphine was coordinated to rhodium(I) and the resulting rhodium complex was covalently bound to a mesoporous SBA-15 support. The catalytic activity of this hybrid material was studied for the hydrogenation of 2-cyclohexen-1-one and compared with the corresponding homogeneous catalyst. According to the (31)P-MAS NMR data, the catalytically active species was stable against oxidation; no structural change could be detected after exposing it to air for more than two months. Transmission electron microscopy (TEM) measurements on the used catalyst confirmed that the rhodium species was also stable against reduction to the metal because the formation of rhodium nanoparticles during the catalysis could be excluded. The kinetic curves of the recycled system confirmed that this hybrid catalyst shows excellent activity, selectivity, stability, and reusability, and is truly heterogeneous in the hydrogenation reaction.

}, keywords = {alkenes, heterogeneous catalysis, Hydrogenation, mesoporous materials, Rhodium}, issn = {1867-3880}, doi = {10.1002/cctc.201000133}, author = {Wang, Lei and Jia, Mingjun and Shylesh, Sankaranarayanapillai and Philippi, Thomas and Seifert, Andreas and Ernst, Stefan and Singh, Anand Pal and Thiel, Werner R.} } @article { ISI:000278165900028, title = {Crystallization and preliminary X-ray diffraction analysis of various enzyme-substrate complexes of isopropylmalate dehydrogenase from thermus thermophilus}, journal = {Acta Crystallographica Section F-Structural Biology and Crystallization Communications}, volume = {66}, number = {6}, year = {2010}, month = {JUN}, pages = {738-743}, publisher = {WILEY-BLACKWELL PUBLISHING, INC}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

The Thermus thermophilus 3-isopropylmalate dehydrogenase (Tt-IPMDH) enzyme catalyses the penultimate step of the leucine-biosynthesis pathway. It converts (2R,3S)-3-isopropylmalate to (2S)-2-isopropyl-3-oxosuccinate in the presence of divalent Mg(2+) or Mn(2+) and with the help of NAD(+). In order to elucidate the detailed structural and functional mode of the enzymatic reaction, crystals of Tt-IPMDH were grown in the presence of various combinations of substrate and/or cofactors. Here, the crystallization, data collection and preliminary crystallographic analyses of six such complexes are reported.

}, issn = {1744-3091}, doi = {10.1107/S174430911001626X}, author = {Merli, Angelo and Manikandan, Karuppasamy and Graczer, Eva and Schuldt, Linda and Singh, Rajesh Kumar and Zavodszky, Peter and Vas, Maria and Weiss, Manfred S.} } @article { ISI:000278592400024, title = {Effect of Fe3O4 on morphology of Fe-SnO2 hyperbranched heterostructures}, journal = {Chemical Physics Letters}, volume = {493}, number = {1-3}, year = {2010}, month = {JUN}, pages = {121-125}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A simple modified thermal evaporation technique is employed for the synthesis of microstructured Fe:SnO2 system and their plausible growth mechanism has been proposed based on the results from various characterization techniques. Such structures grow in two steps; initially, growth of Fe core takes place from Fe3O4 source which acts as nucleating site for SnO2 growth on its surface as per the vapor-liquid- solid progression. Moreover, the composition of Fe/Sn source and temperature are found to have key roles in governing their morphology. XPS studies clearly demonstrate the presence of Fe species, which acts as a catalyst along with source for hetero-structure growth with SnO2. (C) 2010 Published by Elsevier B.V.

}, issn = {0009-2614}, doi = {10.1016/j.cplett.2010.05.019}, author = {Sathe, Bhaskar R. and Walke, Pravin S. and Mulla, Imtiaz S. and Pillai, Vijayamohanan K.} } @article { ISI:000272936000061, title = {Fluconazole analogues containing 2H-1,4-benzothiazin-3(4H)-one or 2H-1,4-benzoxazin-3(4H)-one moieties, a novel class of anti-Candida agents}, journal = {Bioorganic \& Medicinal Chemistry Letters}, volume = {20}, number = {2}, year = {2010}, month = {JAN}, pages = {722-725}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

As a part of our program to develop new antifungal agents, a series of fluconazole analogues was designed and synthesized wherein one of the triazole moieties in fluconazole was replaced with 2H-1,4-benzothiazin-3(4H)-one or 2H-1,4-benzoxazin-3(4H)-one moiety. The new chemical entities thus synthesized were screened against various fungi and it was observed that the compounds 4a and 4i are potent inhibitors of Candida strains. The structure-activity relationship for these compounds is discussed. (C) 2009 Elsevier Ltd. All rights reserved.

}, keywords = {antifungal, Benzothiazinone, Benzoxazinone, Fluconazole}, issn = {0960-894X}, doi = {10.1016/j.bmcl.2009.11.071}, author = {Borate, Hanumant B. and Maujan, Suleman R. and Sawargave, Sangmeshwer P. and Chandavarkar, Mohan A. and Vaiude, Sharangi R. and Joshi, Vinay A. and Wakharkar, Radhika D. and Iyer, Ramki and Kelkar, Ramesh G. and Chavan, Subhash P. and Kunte, Sunita S.} } @article { ISI:000277423200006, title = {Hydrophobically modified poly(vinyl alcohol) using alkoxy-substituted methyl gallate: synthesis and rheology}, journal = {Journal of Polymer Science Part B-Polymer Physics}, volume = {48}, number = {10}, year = {2010}, month = {MAY}, pages = {1054-1063}, publisher = {JOHN WILEY \& SONS INC}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Hydrophobically modified poly(vinyl alcohol) (HMPVA) polymers were synthesized by potassium t-butoxide-catalyzed reaction of PVA with methyl 3,4,5-tris(n-octyloxy) benzoate (MGC(8))/3,4,5-tris(n-dodecyloxy) benzoate (MGC(12)) and 1,3-propane sultone. The concentration of 1,3-propane sultone was kept constant at 10 mol \%. and that of MGC(8) (2, 3, and 4 mol \%)/MGC(12) (2 and 3 mol \%) was varied to obtain HMPVAs with different hydrophobic contents. The incorporation of MGC(8)/MGC(12) and 1,3-propane sultone onto HMPVA was confirmed by NMR spectroscopy. Rheological properties of aqueous solutions also confirmed the presence of hydrophobic and charged functional groups on HMPVAs. In the semidilute regime, the specific viscosity of HMPVAs followed concentration scaling that is typical of polyelectrolytes. At higher concentrations, the HMPVA solutions with 3 and 4 mol \% of MGC(8) exhibited large increase in specific viscosity. Oscillatory experiments on these solutions exhibited gel-like behavior at polymer concentrations of 40-50 g/L. Confocal microscopy images of HMPVA with 4 mol \% of MGC(8) clearly indicated the existence of microgels. The tendency of formation of microgels further increased with increasing chain length of the hydrophobe, that is, with MGC(12). These samples exhibited rheological behavior that is typical of soft solids and was therefore probed by the strain-rate frequency superposition technique reported recently in the literature. HMPVAs with improved rheological properties show potential applications as thickeners in cosmetic creams, lotions and as drug carriers in pharmaceutical formulations. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 1054-1063, 2010

}, keywords = {gallic acid, hydrophobically modified poly(vinyl alcohol), Rheology, water-soluble polymers}, issn = {0887-6266}, doi = {10.1002/polb.21995}, author = {Shedge, Aarti S. and Wadgaonkar, Prakash P. and Lele, Ashish K. and Badiger, Manohar V.} } @article { ISI:000281683900009, title = {Liquid-liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: analysis of bauxite ore}, journal = {Journal of the Serbian Chemical Society}, volume = {75}, number = {8}, year = {2010}, month = {Apr}, pages = {1099-1113}, publisher = {SERBIAN CHEMICAL SOC}, address = {KARNEGIJEVA 4, 11 120 BELGRADE, SERBIA}, abstract = {

The liquid liquid extraction of gallium(III) from hydrochloric acid solution using 2-octylaminopyridine (2-OAP) in chloroform was investigated. The extraction of gallium(III) from 6.0-9.0 mol dm(-3) hydrochloric acid was found to be quantitative using 0.033 mol dm-3 2-OAP in chloroform. The effect of the reagent concentration and other parameters on the extraction of gallium(111) was also studied. The stoichiometry of the extracted species of gallium(In) was determined based on the slope analysis method. The extraction reaction proceeded via the anion exchange mechanism from hydrochloric acid and the extracted species was [RR{\textquoteright}NH(2)(+)GaCl(4)(-)](org). The extraction of gallium(III) was performed in the presence of various ions to ascertain the tolerance limit to individual ions. The temperature dependence of the extraction equilibrium constants was examined to estimate the apparent thermodynamic functions (Delta H, Delta S and Delta G) for the extraction reaction. Gallium(III) was successfully separated from commonly associated metal ions, such as Zn(II), Pb(II), Cd(II), Hg(II), Bi(III), Al(III), Se(IV), Sb(III), Sn(IV), In(III), TI(I) and TI(III). However, gallium(III) was separated from Fe(III) from weak organic acid media. The procedure was also extended to the determination of gallium(III) in bauxite ore by the standard addition method.

}, keywords = {2-OAP, gallium(III), liquid-liquid extraction, recovery of gallium from bauxite}, issn = {0352-5139}, doi = {10.2298/JSC090630072M}, author = {Mahamuni, Sandip V. and Wadgaonkar, Prakash P. and Anuse, Mansing A.} } @article { ISI:000285326300001, title = {New ATRP initiator for synthesis of cyclic carbonate-terminated poly(methyl methacrylate)}, journal = {Reactive \& Functional Polymers}, volume = {70}, number = {12}, year = {2010}, month = {DEC}, pages = {931-937}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A new ATRP initiator, viz, 2-oxo-1,3-dioxolan-4-yl-(methyl-2-bromo-2-methylpropanoate) (ODMBMP) was synthesized by the reaction of commercially available glycerol carbonate with 2-bromoisobutyrylbromide and was used to carry out ATRP reactions of methyl methacrylate (MMA) in the presence of copper chloride/N,N{\textquoteright},N{\textquoteright},N{\textquoteright}{\textquoteright}N{\textquoteright}{\textquoteright}-pentamethyldiethylenetriamine to afford low molecular weight (M(n)(GPC) = 1750-7550) cyclic carbonate-terminated poly(methyl methacrylate)s with relatively narrow molecular weight distribution (M(w)/M(n) = 1.16-1.30). Poly(methyl methacrylate)s having higher molecular weight (M(n)(GPC) = 18,250 and 44,130) could also be synthesized using ODMBMP as the ATRP initiator. The kinetic studies of bulk ATRP of MMA showed a linear relationships between both In[M](o)/[M(t)] vs time and molecular weight vs conversion indicating controlled/living polymerization. The presence of cyclic carbonate functionality in poly(methyl methacrylate)s was confirmed by FUR. (1)H NMR, and (13)C NMR spectroscopy. The reactivity of cyclic carbonate group was demonstrated by a model reaction using n-propyl amine and the results showed quantitative conversion to hydroxyl urethane group. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Atom transfer radical polymerization (ATRP), cyclic carbonate, functional polymers, poly(methyl methacrylate)}, issn = {1381-5148}, doi = {10.1016/j.reactfunctpolym.2010.08.005}, author = {Palaskar, Dnyaneshwar V. and Sane, Prakash S. and Wadgaonkar, Prakash P.} } @article {42453, title = {N-heterocyclic carbene-catalyzed cascade reaction involving the hydroacylation of unactivated alkynes}, journal = {Journal of the American Chemical Society}, volume = {132}, year = {2010}, month = {APR}, pages = {5970{\textendash}5971}, abstract = {

The N-heterocyclic carbene (NHC)-catalyzed hydroacylation of unactivated alkynes to provide α,β-unsaturated ketones is reported. In addition, a rare case of an efficient and selective dually NHC-catalyzed cascade reaction involving the hydroacylation of alkynes and a subsequent intermolecular Stetter reaction allows the formation of chromanones containing a 1,4-diketone moiety.

}, doi = {10.1021/ja102130s}, author = {Biju, Akkattu T. and Wurz, Nathalie E. and Glorius, Frank} } @article {43241, title = {Non-covalent interactions in extended systems described by the effective fragment potential method: theory and application to nucleobase oligomers}, journal = {Journal of Physical Chemistry A}, volume = {114}, year = {2010}, month = {NOV}, abstract = {The implementation of the effective fragment potential (EFP) method within the Q-CHEM electronic structure package is presented. The EFP method is used to study noncovalent π-π and hydrogen-bonding interactions in DNA strands. Since EFP is a computationally inexpensive alternative to high-level ab initio calculations, it is possible to go beyond the dimers of nucleic acid bases and to investigate the asymptotic behavior of different components of the total interaction energy. The calculations demonstrated that the dispersion energy is a leading component in π-stacked oligomers of all sizes. Exchange-repulsion energy also plays an important role. The contribution of polarization is small in these systems, whereas the magnitude of electrostatics varies. Pairwise fragment interactions (i.e., the sum of dimer binding energies) were found to be a good approximation for the oligomer energy.}, author = {Ghosh, Debashree and Kosenkov, Dmytro and Vanovschi, Vitalii and Williams, Christopher F. and Herbert, John M. and Gordon, Mark S. and Schmidt, Michael W. and Slipchenko, Lyudmila V. and Krylov, Anna I.} } @article { ISI:000275434800071, title = {Novel poly(amide-hydrazide)s and copoly(amide-hydrazide)s from Bis-(4-aminobenzyl) hydrazide and aromatic diacid chlorides: synthesis and characterization}, journal = {Journal of Applied Polymer Science}, volume = {116}, number = {4}, year = {2010}, month = {MAY}, pages = {2441-2450}, publisher = {JOHN WILEY \& SONS INC}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

A new aromatic diamine, viz., bis-(4-aminobenzyl) hydrazide (BABH), which contains preformed hydrazide and methylene linkage, was synthesized starting from alpha-tolunitrile. The BABH and intermediates involved in its synthesis were characterized by spectroscopic methods. Novel poly(amide-hydrazide)s were synthesized by low temperature solution polycondensation of BABH with isophthaloyl chloride (IPC) and terephthaloyl chloride (TPC). Furthermore, two series of copoly(amide-hydrazide)s, based on different mol \% of BABH and bis-(4-aminophenyl) ether (ODA) with IPC/TPC were also synthesized. Poly(amidehydrazide)s and copoly(amide-hydrazide)s were characterized by inherent viscosity [eta(inh)], FTIR, solubility, X-ray diffraction (MUD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The polycondensation proceeded smoothy and afforded the polymers with inherent viscosities in the range of 0.18-093 dL/g in (NMP + 4\% LiCl) at 30 degrees C +/- 0.1 degrees C. These polymers dissolved in DMAc, NMP or DMSO containing LiCl. The solubility of copolymers was considerably improved in line with less crystalline nature due to random placement of constituent monomers during the copolymerization. XRD data indicated that poly(amide-hydrazide)s from BABH alone and IPC/TPC had higher crystallinity than the corresponding copoly(amide-hydrazide)s derived from a mixture of BABH and bis-(4-aminophenyl) ether (ODA). Polymers showed initial weight loss around 160 degrees C which is attributed to the cyclodehydration leading to the formation of corresponding poly(amide-oxadiazole)s. Copolyamide-hydrazides showed, T(max) between 400 and 540 degrees C which is essentially the decomposition of poly(amide-oxadiazole)s. (C) 2010 Wiley Periodicals, Inc. J App Polym Sci 116: 2441-2450, 2010

}, keywords = {bis-(4-aminobenzyl) hydrazide, poly(amide-hydrazide), structure-property relations, Thermogravimetric analysis (TGA), x-ray diffractograms}, issn = {0021-8995}, doi = {10.1002/app.31849}, author = {Medhi, M. and Patil, A. S. and Halhalli, Mahadeo R. and Choubey, A. and Wadgaonkar, P. P. and Maldar, Noormahamad N.} } @article { ISI:000277768000019, title = {Poly(amideimide)s containing pendant pentadecyl chains: synthesis and characterization}, journal = {Polymer Degradation and Stability}, volume = {95}, number = {5}, year = {2010}, month = {MAY}, pages = {837-844}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

A new aromatic diacylhydrazide monomer viz., 4-[4{\textquoteright}-(hydrazinocarbonyl)phenoxy]-2- pentadecylbenzo-hydrazide was synthesized starting from cardanol, which in turn is obtainable from cashew nut shell liquid a renewable resource material. A series of new poly(amideimide)s containing flexibilizing ether linkages and pendant pentadecyl chains was synthesized from 4-[4{\textquoteright}-(hydrazinocarbonyl)phenoxy]-2-pentade-cylbenzohydrazide and commercially available aromatic dianhydrides, viz., benzene-1,2,4,5-tetracarboxylic dianhydride, 3,3{\textquoteright},4,4{\textquoteright}-biphenyltetracarboxylic dianhydride, benzophenone-3,3{\textquoteright},4,4{\textquoteright}-tetracarboxylic dianhydride, 4,4{\textquoteright}-oxydiphthalic anhydride and 4,4{\textquoteright}-(hexafluoro isopropylidene)diphthalic anhydride by a two-step solution polycondensation in N,N-dimethylacetamide via the poly(hydrazide acid) intermediate. Inherent viscosities of poly(amideimide)s were in the range 0.60-0.64 dL/g in N,N-dimethylacetamide at 30 +/- 0.1 degrees C. Poly(amideimide)s could be solution cast into tough, transparent and flexible films from their N,N-dimethylacetamide solutions. The solubility of poly(amideimide)s was significantly improved by incorporation of pendant pentadecyl chains and were found to be soluble in N,N-dimethylacetamide, 1-methyl-2-pyrrolidinone, pyridine and m-cresol at room temperature or upon heating. Wide angle X-ray diffraction patterns of poly(amideimide)s revealed a broad halo at around 2 theta = similar to 19 degrees suggesting that polymers were amorphous in nature. In the small-angle region, diffuse to sharp reflections of a typically layered structure resulting from the packing of pentadecyl side chains were observed. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, of poly(amideimide)s was in the range of 388-410 degrees C indicating their good thermal stability. Glass transition temperatures of poly(amideimide)s were in the range 162-198 degrees C. It was observed that the plasticization effect of attached pentadecyl side chains induced the depression of T(g). (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Cardanol, Cashew nut shell liquid, Pentadecyl chains, Plasticization, Poly(amideimide)s, thermal stability}, issn = {0141-3910}, doi = {10.1016/j.polymdegradstab.2010.01.030}, author = {More, Arvind S. and Patil, Anandrao S. and Wadgaonkar, Prakash P.} } @article { ISI:000277643500009, title = {QTL mapping of multiple foliar disease and root-lesion nematode resistances in wheat}, journal = {Molecular Breeding}, volume = {26}, number = {1}, year = {2010}, month = {JUN}, pages = {107-124}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

A genetic linkage map, based on a cross between the synthetic hexaploid CPI133872 and the bread wheat cultivar Janz, was established using 111 F(1)-derived doubled haploid lines. The population was phenotyped in multiple years and/or locations for seven disease resistance traits, namely, Septoria tritici blotch (Mycosphaeralla graminicola), yellow leaf spot also known as tan spot (Pyrenophora tritici-repentis), stripe rust (Puccinia striiformis f. sp. tritici), leaf rust (Puccinia triticina), stem rust (Puccinia graminis f. sp. tritici) and two species of root-lesion nematode (Pratylenchyus thornei and P. neglectus). The DH population was also scored for coleoptile colour and the presence of the seedling leaf rust resistance gene Lr24. Implementation of a multiple-QTL model identified a tightly linked cluster of foliar disease resistance QTL in chromosome 3DL. Major QTL each for resistance to Septoria tritici blotch and yellow leaf spot were contributed by the synthetic hexaploid parent CPI133872 and linked in repulsion with the coincident Lr24/Sr24 locus carried by parent Janz. This is the first report of linked QTL for Septoria tritici blotch and yellow leaf spot contributed by the same parent. Additional QTL for yellow leaf spot were detected in 5AS and 5BL. Consistent QTL for stripe rust resistance were identified in chromosomes 1BL, 4BL and 7DS, with the QTL in 7DS corresponding to the Yr18/Lr34 region. Three major QTL for P. thornei resistance (2BS, 6DS, 6DL) and two for P. neglectus resistance (2BS, 6DS) were detected. The recombinants combining resistance to Septoria tritici blotch, yellow leaf spot, rust diseases and root-lesion nematodes from parents CPI133872 and Janz constitute valuable germplasm for the transfer of multiple disease resistance into new wheat cultivars.

}, keywords = {Pratylenchyus spp, Pyrenophora tritici-repentis, Rust diseases, Septoria tritici blotch, Synthetic hexaploid wheat, Triticum aestivum}, issn = {1380-3743}, doi = {10.1007/s11032-009-9381-9}, author = {Rebecca S. Zwart and Thompson, J. P. and Milgate, A. W. and Bansal, Urmil K. and Williamson, P. M. and Raman, H. and Bariana, Harbans S.} } @article { ISI:000279085200015, title = {Regularly alternating poly(amideimide)s containing pendent pentadecyl chains: synthesis and characterization}, journal = {European Polymer Journal}, volume = {46}, number = {6}, year = {2010}, month = {JUN}, pages = {1307-1315}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Two new aromatic diamines containing preformed amide linkages, viz., N,N{\textquoteright}-(4-pentadecyl-1,3-phenylene)bis(4-aminobenzamide) I and N,N{\textquoteright}-(4-pentadecyl-1,3-phenylene)bis(3-aminobenzamide) II, were synthesized by reaction of 4-pentadecylbenzene-1,3-diamine with 4-nitrobenzoylchloride and 3-nitrobenzoylchloride, followed by reduction of the respective dinitro derivatives. A series of new poly(amideimide)s was synthesized by poly-condensation of I and II with four commercially available aromatic dianhydrides, viz., pyromellitic dianhydride (PMDA), 4,4{\textquoteright}-biphenyltetracarboxylic dianhydride (BPDA), 4,4{\textquoteright}-oxydiphthalic anhydride (ODPA), and 4,4{\textquoteright}-(hexafluoroisopropylidene)diphthalic anhydride (6-FDA) in N,N-dimethylacetamide (DMAc) employing conventional two step method via poly(amic acid) intermediate followed by thermal imidization. Reference poly(amideimide)s were synthesized by polycondensation of N,N{\textquoteright}-(1,3-phenylene)bis(4-aminobenzamide) and N,N{\textquoteright}-(1,3-phenylene)bis(3-aminobenzamide) with the same aromatic dianhydrides. Inherent viscosities of poly(amideimide)s containing pendent pentadecyl chains were in the range 0.37-1.23 dL/g in N,N-dimethylacetamide at 30 +/- 0.1 degrees C indicating the formation of medium to high molecular weight polymers. The poly(amideimide)s containing pendent pentadecyl chains were found to be soluble in N,N-dimethylacetamide, N,N-dimethylformamide, 1-methyl-2-pyrrolidinone and pyridine and could be cast into transparent, flexible and tough films from their N,N-dimethylacetamide solution. Wide angle X-ray diffraction patterns exhibited broad halo indicating that the polymers were essentially amorphous in nature. X-ray diffractograms also displayed sharp reflection in the small angle region (20 approximate to 3 degrees) for poly(amideimide)s containing pentadecyl chains indicating the formation of layered structure arising from packing of flexible pentadecyl chains. The glass transition temperatures observed for reference poly(amideimide)s were in the range 331-275 degrees C and those for poly(amideimide)s containing pendent pentadecyl chains were in the range 185-286 degrees C indicating a large drop in T(g), owing to the {\textquoteleft}{\textquoteleft}internal plasticization{\textquoteright}{\textquoteright} effect of pentadecyl chains. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, were in the range 460-480 degrees C indicating their good thermal stability. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Glass transition temperature, Pendent pentadecyl chain, Poly(amideimide)s, Preformed amide linkage, thermal stability}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2010.03.007}, author = {Sadavarte, Nilakshi V. and Avadhani, C. V. and Naik, Parimal V. and Wadgaonkar, Prakash P.} } @article { ISI:000281175500059, title = {Simple chemical co-precipitation/calcination route for the synthesis of simulated synroc-B and synroc-C powders}, journal = {Materials Chemistry and Physics}, volume = {123}, number = {2-3}, year = {2010}, month = {OCT}, pages = {695-699}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

A simple chemical co-precipitation/calcination route was developed for the synthesis of simulated synroc-B and synroc-C powders using mostly nitrate salts as starting chemicals and 20\% ammonia solution as precipitant. In this route, a mixed solution containing Al-nitrate, Ca-nitrate, Ba-nitrate, zirconyl nitrate and titanyl nitrate in the molar proportion required for synroc-B is added to dilute ammonia solution to precipitate these cations in the form of their hydroxides at room temperature by maintaining pH approximate to 10.5 during precipitation. Formation of a major fluorite phase with minor amounts of anatase, rutile and hollandite phases is observed in the powder obtained after calcination in air at 750 degrees C. Multiphase crystalline synroc-B matrix containing hollandite, perovskite, zirconolite, and rutile phases is obtained after sintering the heat treated powder in the form of pellets at 1230 degrees C for 4h in air. Similarly, pure synroc-C phases with 14 and 20\% simulated waste loadings were synthesized following the same synthesis protocol. These pre-treated powders with a high surface area of similar to 25 m(2) g(-1) gave sintered ceramics having density of similar to 90\% for 14 and 20\% waste loadings. (C) 2010 Elsevier B.V. All rights reserved.

}, keywords = {Ceramics, Chemical synthesis, Oxides, Sintering}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2010.05.039}, author = {Potdar, H. S. and Vijayanand, S. and Mohaideen, Kamal Khaja and Patil, K. R. and Joy, Pattayil Alias and Madhavan, R. Raja and Kutty, K. V. G. and Ambashta, Ritu D. and Wattal, P. K.} } @article { ISI:000284261800094, title = {Small molecule inhibition of phosphatidylinositol-3,4,5-triphosphate (PIP3) binding to pleckstrin homology domains}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {107}, number = {46}, year = {2010}, month = {NOV}, pages = {20126-20131}, publisher = {NATL ACAD SCIENCES}, address = {2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA}, abstract = {

The PI3-kinase (PI3K) pathway regulates many cellular processes, especially cell metabolism, cell survival, and apoptosis. Phosphatidylinositol-3,4,5-trisphosphate (PIP3), the product of PI3K activity and a key signaling molecule, acts by recruiting pleckstrin-homology (PH) domain-containing proteins to cell membranes. Here, we describe a new structural class of nonphosphoinositide small molecule antagonists (PITenins, PITs) of PIP3-PH domain interactions (IC50 ranges from 13.4 to 31 mu M in PIP3/Akt PH domain binding assay). PITs inhibit interactions of a number of PIP3-binding PH domains, including those of Akt and PDK1, without affecting several PIP2-selective PH domains. As a result, PITs suppress the PI3K-PDK1-Akt pathway and trigger metabolic stress and apoptosis. A PIT-1 analog displayed significant antitumor activity in vivo, including inhibition of tumor growth and induction of apoptosis. Overall, our studies demonstrate the feasibility of developing specific small molecule antagonists of PIP3 signaling.

}, keywords = {Anticancer, PIP3 antagonist}, issn = {0027-8424}, doi = {10.1073/pnas.1004522107}, author = {Miao, Benchun and Skidan, Igor and Yang, Jinsheng and Lugovskoy, Alexey and Reibarkh, Mikhail and Long, Kai and Brazell, Tres and Durugkar, Kulbhushan A. and Maki, Jenny and Ramana, C. V. and Schaffhausen, Brian and Wagner, Gerhard and Torchilin, Vladimir and Yuan, Junying and Degterev, Alexei} } @article { ISI:000281125800003, title = {Structure-function mimicry of oxidized purple acid phosphatase-PAP(ox)-A new functional model}, journal = {Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical \& Analytical Chemistry}, volume = {49}, number = {8}, year = {2010}, month = {AUG}, pages = {1023-1029}, publisher = {NATL INST SCIENCE COMMUNICATION-NISCAIR}, address = {DR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIA}, abstract = {

{Electronic structure and spectroscopic properties of the novel diiron active site of oxidized mammalian purple acid phosphatase analogues, Fe-6: [Fe-2 (mu-O) (mu-OAc) (4HNSQ(ox))(2 center dot-)(ONSQ(ox))(2 center dot-)(H2O)(4)] and Fe-7: [Fe-2 (mu-O) (mu-OAc)(ONSQ(ox))(2 center dot-)(OAc) (H2O)(4)] are described. Magnetic susceptibility SQUID data of Fe-6 are best fitted to Heisenberg{\textquoteright}s isotropic spin pair (S = 5/2, 3/2) model using magnetic parameters g = 2 and J = - 36.8 cm(-1) with R factor = 6.4 x 10(-4). The antiferromagnetic exchange establishes Fe(III)-O-Fe(III) dimeric core with Fe(III) site having two radical ligations in the naphthosemiquinone oxime form of lawsone oxime. In the model compound Fe-7 of oxidized purple acid phosphatase, bridged and terminal acetate functions are identified according to their different energies of activations, i.e, similar to 34 and 58 kJ mol(-1) respectively. Also, the reduced naphthoquinone oxime form of ligand is characterized by its energy of activation (similar to 15 kJ mol(-1)) from pyrolytic reaction. Mossbauer parameters

}, keywords = {Antiferromagnetic exchange, Bioinorganic chemistry, DNA cleavage, iron, Nuclease activity, PAP(ox) analogues}, issn = {0376-4710}, author = {Waghmode, Shobha A. and Date, Sadgopal K. and Gupta, Vidya S. and Rane, Sandhya Y.} } @article { ISI:000281369500037, title = {Synthesis and characterization of aromatic polyazomethines bearing pendant pentadecyl chains}, journal = {Polymer Degradation and Stability}, volume = {95}, number = {9}, year = {2010}, month = {SEP}, pages = {1727-1735}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Aromatic diamine monomer viz., 4-(4{\textquoteright}-aminophenoxy)-2-pentadecylbenzenamine containing pendant pentadecyl chain was synthesized starting from cashew nut shell liquid - a renewable resource material and was characterized by FTIR, (1)H and (13)C NMR spectroscopy. A series of new (co) polyazomethines containing pendant pentadecyl chains and flexibilizing ether linkages was synthesized by polycondensation of 4-(4{\textquoteright}-aminophenoxy)-2-pentadecyl benzenamine with commercially available aromatic dialdehydes viz., terephthaldehyde (TPA), isophthaldehyde (IPA) and varying mixture of TPA and IPA. Inherent viscosities and number average molecular weights of (co) polyazomethines were in the range 0.50-0.70 dL/g and 10,490-40-800 (GPC, polystyrene standard), respectively indicating formation of medium to reasonably high molecular weight polymers. (Co) polyazomethines containing pendant pentadecyl chains were found to be soluble in common organic solvents such as chloroform, dichloromethane, tetrahydrofuran, pyridine, m-cresol and could be cast into transparent and stretchable films from their solution in chloroform. (Co) polyazomethines were essentially amorphous in nature and the formation of loosely-developed layered structure was observed arising from the packing of pendant pentadecyl chains. Polyazomethines exhibited glass transition temperatures (T(g)) in the range 21-48 degrees C. The observed depression of glass transition temperature could be ascribed to the {\textquoteleft}{\textquoteleft}internal plasticization{\textquoteright}{\textquoteright} effect of pentadecyl chains. The temperature at 10\% wt loss (T(10)), determined from TGA in nitrogen atmosphere of polyazomethines were in the range 434-441 degrees C indicating their good thermal stability. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Cashew nut shell liquid, CNSL, pentadecyl, polyazomethines, renewable, Side-chain, solubility}, issn = {0141-3910}, doi = {10.1016/j.polymdegradstab.2010.05.017}, author = {More, Arvind S. and Sane, Prakash S. and Patil, Anandrao S. and Wadgaonkar, Prakash P.} } @article { ISI:000279996500008, title = {Synthesis and characterization of new aromatic polyesters containing pendent naphthyl units}, journal = {Journal of Applied Polymer Science}, volume = {117}, number = {5}, year = {2010}, month = {SEP}, pages = {2545-2552}, publisher = {JOHN WILEY \& SONS INC}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

Two bisphenols, viz., 4,4{\textquoteright}-[1-(2-naphthaleny-1)ethylidene]bisphenol and 4,4{\textquoteright}-[1-(2-naphthalenyl) ethylidene]bis-3-methylphenol were prepared by condensation of commercially available 2-acetonaphthanone with phenol and o-cresol, respectively. A series of new aromatic polyesters containing pendent naphthyl units was synthesized by phase-transfer-catalyzed interfacial polycondensation of these bisphenols with isophthaloyl chloride, terephthaloyl chloride, and a mixture of isophthaloyl chlorideiterephthaloyl chloride (50 : 50 mol \%). Inherent viscosities of polyesters were in the range 0.83-1.76 dL g(-1), while number average molecular weights (M(n)) were in the range 61,000-235,000 g mol(-1). Polyesters were readily soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, m-cresol, pyridine, N,N-dimethylformamide, N,N-dimethylacetarnide, and 1-methyl-2-pyrrolidinone at room temperature. Tough, transparent, and flexible films were cast from a solution of polyesters in chloroform. X-Ray diffraction measurements displayed a broad halo at 20 congruent to 19 degrees indicating the amorphous nature of polyesters. Glass transition temperatures of polyesters were in the range 209-259 degrees C. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, of polyesters was in the range 435-500 degrees C indicating their good thermal stability. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 117: 2545-2552, 2010

}, keywords = {Aromatic polyesters, bisphenol, interfacial polycondensation, pendent naphthyl units}, issn = {0021-8995}, doi = {10.1002/app.32162}, author = {Honkhambe, Pandurang N. and Biyani, Mahesh V. and Bhairamadgi, Nagendra S. and Wadgaonkar, Prakash P. and Salunkhe, Manikrao M.} } @article { ISI:000276790500011, title = {Synthesis and characterization of new aromatic polyesters containing cardo decahydronaphthalene groups}, journal = {European Polymer Journal}, volume = {46}, number = {4}, year = {2010}, month = {APR}, pages = {709-718}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Three cardo bisphenols containing decahydronaphthalene group viz., 4,4{\textquoteright}-(octahydro-2(1H)-naphthylidene)bisphenol, 4,4{\textquoteright}-(octahydro-2(1H)-naphthylidene)bis-3-methylphenol and 4,4{\textquoteright}-(octahydro-2(1H)-naphthylidene)bis-3,5-dimethylphenol were synthesized starting from commercially available 2-naphthol and were utilized for synthesis of new aromatic polyesters by phase transfer-catalyzed interfacial polycondensation with isophthaloyl chloride, terephthaloyl chloride and a mixture of isophthaloyl chloride and terephthaloyl chloride (50:50 mol \%). Inherent viscosities and number average molecular weights (M(n)) of polyesters were in the range 0.35-0.84 dL/g and 13300-48,500 (Gel Permeation Chromatography, polystyrene standard), respectively. Polyesters were readily soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, meta-cresol, pyridine, N,N-dimethylformamide, N,N-dimethylacetamide, and 1-methy1-2-pyrrolidinone at room temperature and could be cast into tough, transparent and flexible films from their chloroform solutions. Wide-angle X-ray diffraction measurements revealed the amorphous nature of polyesters. The glass transition temperature of polyesters was in the range 207-287 degrees C. The temperature at 10\% weight loss (T(10)), determined from thermogravimetric analysis of polyesters, was in the range 425-460 degrees C indicating their good thermal stability. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {bisphenol, Cardo, Decahydronaphthalene, polyester, Structure-property relationship}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2009.12.028}, author = {Honkhambe, Pandurang N. and Bhairamadgi, Nagendra S. and Biyani, Mahesh V. and Wadgaonkar, Prakash P. and Salunkhe, Manikrao M.} } @article { ISI:000278307300018, title = {Synthesis and characterization of novel aromatic-aliphatic polyamides from bis-[(4-aminobenzyl)-4-benzamide] ether}, journal = {Materials Science and Engineering B-Advanced Functional Solid-State Materials}, volume = {168}, number = {1-3, SI}, year = {2010}, note = {Conference on Specialty Advanced Materials and Polymers for Aerospace and Defense and Applications (SAMPADA-2008), Mat Res Soc Singapore, Singapore, SINGAPORE, JUL 03-08, 2005}, month = {APR}, pages = {111-116}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A novel aromatic diamine monomer containing preformed aromatic-aliphatic amide and ether linkage, bis-[(4-aminobenzyl)-4-benzamide] ether (BABE) was prepared from 2-phenylacetonitrile. BABE was characterized by FT-IR, (1)H NMR, (13)C NMR and mass spectrometry. Five new aromatic polyamides were prepared by low temperature solution polymerization from BABE and different mole proportions of isophthaloyl chloride (IPC) or terephthaloyl chloride (TPC). The resulting polymers were characterized by means of FT-IR, inherent viscosity [eta(inh)], solubility, differential scanning calorimetry [DSC], thermogravimetric analysis [TGA] and X-ray diffraction [XRD]. Polyamides were obtained in good yields and had moderate to high molecular weights as indicated by inherent viscosities in the range 0.63-1.35 dL/g in (DMAc + 4\% LiCl). XRD results showed the partly crystalline nature of polymers and these polymers dissolved in aprotic polar solvents containing LiCl. The solubility of copolyamides improved due to random placement of constituent IPC and TPC during polymerization. DSC analysis of these polyamides showed glass transition temperatures in the range of 197-204 degrees C, and they showed no weight loss below 336 degrees C when analyzed by TG. These polyamides have potential applications as engineering materials. (C) 2009 Elsevier B.V. All rights reserved.

}, keywords = {Bis-[(4-aminobenzyl)-4-benzamide] ether, ether linkage, Inherent viscosity, polyamides, thermal stability, XRD}, issn = {0921-5107}, doi = {10.1016/j.mseb.2009.10.016}, author = {Patil, A. S. and Medhi, M. and Sadavarte, Nilakshi V. and Wadgaonkar, P. P. and Maldar, Noormahamad N.} } @article { ISI:000276284200019, title = {Synthesis and characterization of polyamides containing pendant pentadecyl chains}, journal = {European Polymer Journal}, volume = {46}, number = {3}, year = {2010}, month = {MAR}, pages = {557-567}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A new aromatic diacid monomer viz., 4-(4{\textquoteright}-carboxyphenoxy)-2-pentadecylbenzoic acid was synthesized starting from cardanol and was characterized by FTIR, (1)H- and (13)C NMR spectroscopy. A series of new aromatic polyamides containing ether linkages and pendant pentadecyl chains was prepared by phosphorylation polycondensation of 4-(4{\textquoteright}-carboxyphenoxy)-2-pentadecylbenzoic acid with five commercially available aromatic diamines viz., 1,4-phenylenediamine, 4,4{\textquoteright}-oxydianiline, 4,4{\textquoteright}-methylenedianiline, 1,3-phenylenediamine, and 4,4{\textquoteright}-(hexafluoroisopropylidene)dianiline. Inherent viscosities of the polyamides were in the range 0.45-0.66 dL/g in N,N-dimethylacetamide at 30 +/- 0.1 degrees C. The introduction of ether linkages and pendant pentadecyl chains into polyamides led to an enhanced solubility in N,N-dimethylacetamide and 1-methyl-2-pyrrolidinone at room temperature or upon heating. The polyamides could be solution-cast into tough, flexible and transparent films from their N,N-dimethylacetamide solution. Wide angle X-ray diffraction patterns exhibited broad halo indicating that the polymers were essentially amorphous in nature. X-Ray diffractograms also displayed a diffuse to sharp reflection in the small-angle region (20 = similar to 2-5 degrees) for the polyamides characteristics of formation of loosely to well-developed layered structure arising from packing of flexible pentadecyl chains. The glass transition temperature observed for the polyamides was in range 139-189 degrees C. The temperature at 10\% weight loss (T(10)), determined by TGA in nitrogen atmosphere, of the polyamides was in the range 425-453 degrees C indicating their good thermal stability. (C) 2009 Elsevier Ltd. All rights reserved.

}, keywords = {alkyl side-chain, Cardanol, Cashew nut shell liquid, Pentadecyl chains, polyamides}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2009.11.014}, author = {More, Arvind S. and Pasale, Sharad K. and Wadgaonkar, Prakash P.} } @article { ISI:000283103300014, title = {Synthesis and characterization of polyesters based on 1,1,1-[bis(4-hydroxyphenyl)-4 {\textquoteleft}-pentadecylphenyl]ethane}, journal = {Polymer International}, volume = {59}, number = {10}, year = {2010}, month = {OCT}, pages = {1408-1414}, publisher = {JOHN WILEY \& SONS LTD}, address = {THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND}, abstract = {

Aromatic polyesters are of considerable interest because of their excellent mechanical properties, chemical resistance and thermal stability. However, most aromatic polyesters are difficult to process due to their high glass transition temperatures coupled with their insolubility in common organic solvents. The present article describes a series of organosoluble polyesters and copolyesters based on 1,1,1-[bis(4-hydroxyphenyl)-4{\textquoteright}-pentadecylphenyl]ethane. A series of new aromatic polyesters containing pendant pentadecyl chains was synthesized by interfacial polycondensation of 1,1,1-[bis(4-hydroxyphenyl)-4{\textquoteright}-pentadecylphenyl]ethane with terephthalic acid chloride (TPC), isophthalic acid chloride (IPC) and a mixture of TPC and IPC. A series of copolyesters was synthesized from 4,4{\textquoteright}-isopropylidenediphenol with TPC by incorporating 1,1,1-[bis(4-hydroxyphenyl)-4{\textquoteright}-pentadecylphenyl]ethane as a comonomer. Inherent viscosities of the polyesters and copolyesters were in the range 0.72-1.65 dL g(-1) and number-average molecular weights were in the range 18 170-87 220. The polyesters and copolyesters containing pendant pentadecyl chains dissolved readily in organic solvents such as chloroform, dichloromethane, pyridine and m-cresol and could be cast into transparent, flexible and apparently tough films. Wide-angle X-ray diffraction data revealed the amorphous nature of the polyesters and copolyesters. The formation of loosely developed layered structure was observed due to the packing of pendant pentadecyl chains. The temperature at 10\% weight loss, determined using thermogravimetric analysis in nitrogen atmosphere, of the polyesters and copolyesters containing pendant pentadecyl chains was in the range 400-460 degrees C. The polyesters and copolyesters exhibited glass transition temperatures in the range 63-82 degrees C and 177-183 degrees C, respectively. (C) 2010 Society of Chemical Industry

}, keywords = {cashew nutshell liquid, CNSL, pentadecyl, polyesters, renewable}, issn = {0959-8103}, doi = {10.1002/pi.2883}, author = {More, Arvind S. and Naik, Parimal V. and Kumbhar, Kishor P. and Wadgaonkar, Prakash P.} } @article { ISI:000278307300032, title = {Synthesis and characterization of polyesters from 2,3-bis (4 {\textquoteleft}-hydroxy phenyl) quinoxaline and 2,3-bis (2 {\textquoteleft}-hydroxynaphthalene-6 {\textquoteleft}-yl) quinoxaline}, journal = {Materials Science and Engineering B-Advanced Functional Solid-State Materials}, volume = {168}, number = {1-3, SI}, year = {2010}, note = {Conference on Specialty Advanced Materials and Polymers for Aerospace and Defense and Applications (SAMPADA-2008), Mat Res Soc Singapore, Singapore, SINGAPORE, JUL 03-08, 2005}, month = {APR}, pages = {186-192}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Two bisphenols containing pendant, quinoxaline moiety; 2,3-bis (4{\textquoteright}-hydroxy phenyl) quinoxaline (BHPQ) and 2,3-bis (2{\textquoteright}-hydroxynaphthalene-6-yl) quinoxaline (BHNQ) were synthesized and characterized by FT-IR, (1)H, (13)C NMR and mass spectrometry. Aromatic polyesters and copolyesters were prepared by interfacial polymerization from BHPQ or BHNQ and isophthaloyl chloride or terephthaloyl chloride or a mixture of different mole proportions of (IPC + TPC). These polyesters and copolyesters were characterized by spectroscopic technique, viscosity measurement, solubility, thermal stability. DSC and XRD. Polymers had moderate to high molecular weights as evidenced by the inherent viscosities in the range 0.35-0.78 dL/g for BHPQ series and 0.27-0.52 dL/g for BHNQ series. BHPQ polyesters and copolyesters dissolved in m-cresol, NMP and conc. H(2)SO(4) whereas, BHNQ polyesters and copolyesters were readily soluble in NMP, DMAc, (TCE + phenol) and partly soluble in solvent like CHCl(3), pyridine, etc. Wide angle X-ray diffraction (WAXD) results showed that introduction of quinoxaline moiety into polymer chain and aromatic phenyl/rigid naphthyl structures lead to crystalinity. Differentional scanning calorimetry of BHNQ polyesters showed the glass transition temperatures in the range of 131-151 degrees C. BHPQ polyesters did not show any weight loss below 330 degrees C and retained 27-55\% weight at 900 degrees C when investigated by TGA under nitrogen atmosphere demonstrating good thermal stability BHNQderived polyesters showed initial decomposition temperatures in range 211-234 degrees C. The structure-property relationships for the mentioned polyesters are analyzed, as these polyesters are of interest as materials for electronics, microelectronics and membrane separation. (C) 2009 Elsevier B.V. All rights reserved.

}, keywords = {2, 3-Bis (2 {\textquoteleft}-hydroxynaphthalene-6 {\textquoteleft}-yl) quinoxaline, 3-Bis (4 {\textquoteleft}-hydroxy phenyl) quinoxaline, Aromatic polyesters, Glass transition temperature, solubility, Thermal properties}, issn = {0921-5107}, doi = {10.1016/j.mseb.2009.12.036}, author = {Patil, V. B. and Medhi, M. and Bhairamadgi, Nagendra S. and Wadgaonkar, P. P. and Maldar, Noormahamad N.} } @article { ISI:000292212700020, title = {Alkylation of anisole with 1-hexene and 1-hexanol over zeolite H-beta}, journal = {Reaction Kinetics Mechanisms and Catalysis}, volume = {103}, number = {2}, year = {2011}, month = {AUG}, pages = {481-491}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

An examination of the kinetics of the alkylation of anisole with 1-hexene and 1-hexanol to produce alkylates over zeolite H-beta is presented. Anisole alkylation is found to occur by a set of parallel reactions when hexene is used as the alkylating agent. When hexyl alcohol is the alkylating agent, the reaction follows a multi-step parallel-series mechanism to form monoalkylates and dihexylether. With 1-hexene, a group of isomeric alkylates, viz., ortho-2-hexyl anisole (2-OHA), ortho-3-hexyl anisole (3-OHA), para-2-hexyl anisole (2-PHA), and para-3-hexyl anisole (3-PHA) was obtained. With hexanol, the olefin (hexene) and dihexyl ether were obtained additionally. The influence of process parameters like temperature, catalyst quantity, and alkylating agent on reaction behavior is reported.

}, keywords = {Alkylation, Anisole, H-beta, Hexene, Hexyl alcohol}, issn = {1878-5190}, doi = {10.1007/s11144-011-0310-7}, author = {Surse, P. V. and Wagholikar, S. and Mayadevi, S. and Sivasanker, S.} } @article { ISI:000289367200026, title = {Atomic level description of the domain closure in a dimeric enzyme: thermus thermophilus 3-isopropylmalate dehydrogenase}, journal = {Molecular Biosystems}, volume = {7}, number = {5}, year = {2011}, month = {MAR}, pages = {1646-1659}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

The domain closure associated with the catalytic cycle is described at an atomic level, based on pairwise comparison of the X-ray structures of homodimeric Thermus thermophilus isopropylmalate dehydrogenase (IPMDH), and on their detailed molecular graphical analysis. The structures of the apo-form without substrate and in complex with the divalent metal-ion to 1.8 angstrom resolution, in complexes with both Mn(2+) and 3-isopropylmalate (IPM), as well as with both Mn(2+) and NADH, were determined at resolutions ranging from 2.0 to 2.5 angstrom. Single crystal microspectrophotometric measurements demonstrated the presence of a functionally competent protein conformation in the crystal grown in the presence of Mn(2+) and IPM. Structural comparison of the various complexes clearly revealed the relative movement of the two domains within each subunit and allowed the identification of two hinges at the interdomain region: hinge 1 between alpha d and beta F as well as hinge 2 between alpha h and beta E. A detailed analysis of the atomic contacts of the conserved amino acid side-chains suggests a possible operational mechanism of these molecular hinges upon the action of the substrates. The interactions of the protein with Mn(2+) and IPM are mainly responsible for the domain closure: upon binding into the cleft of the interdomain region, the substrate IPM induces a relative movement of the secondary structural elements beta E, beta F, beta G, alpha d and alpha h. A further special feature of the conformational change is the movement of the loop bearing the amino acid Tyr139 that precedes the interacting arm of the subunit. The tyrosyl ring rotates and moves by at least 5 angstrom upon IPM-binding. Thereby, new hydrophobic interactions are formed above the buried isopropyl-group of IPM. Domain closure is then completed only through subunit interactions: a loop of one subunit that is inserted into the interdomain cavity of the other subunit extends the area with the hydrophobic interactions, providing an example of the cooperativity between interdomain and intersubunit interactions.

}, issn = {1742-206X}, doi = {10.1039/c0mb00346h}, author = {Graczer, Eva and Merli, Angelo and Singh, Rajesh Kumar and Karuppasamy, Manikandan and Zavodszky, Peter and Weiss, Manfred S. and Vas, Maria} } @article { ISI:000292333103041, title = {Atomic level description of the domain closure in a dimeric enzyme: thermus thermophilus 3-isopropylmalate dehydrogenase (IPMDH)}, journal = {FEBS Journal}, volume = {278}, number = {1, SI}, year = {2011}, note = {36th FEBS Congress of the Biochemistry for Tomorrows Medicine, Torino, ITALY, JUN 25-30, 2011}, month = {JUN}, pages = {458}, publisher = {Federat Soc Biochem \& Mol Biol}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, issn = {1742-464X}, author = {Graczer, E. and Merli, Angelo and Singh, R. K. and Karuppasamy, Manikandan and Zavodszky, P. and Weiss, M. S. and Vas, M.} } @article { ISI:000296527900089, title = {Ceria-zirconia mixed oxides as thermal resistant catalysts for the decomposition of nitrous oxide at high temperature}, journal = {Catalysis Today}, volume = {176}, number = {1}, year = {2011}, note = {2nd International Symposium on Air Pollution Abatement Catalysis (APAC), Cracow, POLAND, SEP 08-11, 2011}, month = {NOV}, pages = {453-457}, publisher = {French GDFSUEZ Co}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

This present study deals with the development of thermally stable catalysts for the decomposition of nitrous oxide. There is actually a growing interest to minimise the emissions of nitrous oxide (N(2)O) as side-product from nitric acid plants due to a global warming potential of approximately 300 times higher than that of CO(2). Different strategies have already been implemented at industrial scale but they are still suffering from significant drawbacks essentially associated to a poor selectivity and sometimes a short lifetime in particular when the catalytic process is inserted downstream the ammonia burner. In those critical conditions, with high residual temperature of similar to 900 degrees C, significant surface and bulk reconstructions take place and then lead to drastic losses of specific surface area and related catalytic performances in the decomposition of N(2)O to N(2). Previous investigations performed in our laboratory revealed the potentiality of zirconia particularly after yttria incorporation [Appl. Catal. B 62 (2005) 236]. Novel developments of more stable ceria-zirconia based catalysts are reported in this study. Further stabilisation and enhancement in activity have been discussed on the basis of oxygen mobility related to structural properties. (C) 2010 Elsevier B.V. All rights reserved.

}, keywords = {Ceria-zirconia based catalysts, Greenhouse gas, N(2)O catalytic decomposition, Nitric acid plant, Nitrous oxide}, issn = {0920-5861}, doi = {10.1016/j.cattod.2010.10.068}, author = {Esteves, P. and Wu, Y. and Dujardin, Christophe and Dongare, Mohan K. and Granger, P.} } @article {43255, title = {Comparative genomics of the pathogenic ciliate Ichthyophthirius multifiliis, its free-living relatives and a host species provide insights into adoption of a parasitic lifestyle and prospects for disease control}, journal = {Genome Biology}, volume = {12}, year = {2011}, month = {OCT}, pages = {Article Number: R100}, abstract = {Background: Ichthyophthirius multifiliis, commonly known as Ich, is a highly pathogenic ciliate responsible for {\textquoteright}white spot{\textquoteright}, a disease causing significant economic losses to the global aquaculture industry. Options for disease control are extremely limited, and Ich{\textquoteright}s obligate parasitic lifestyle makes experimental studies challenging. Unlike most well-studied protozoan parasites, Ich belongs to a phylum composed primarily of free-living members. Indeed, it is closely related to the model organism Tetrahymena thermophila. Genomic studies represent a promising strategy to reduce the impact of this disease and to understand the evolutionary transition to parasitism. Results: We report the sequencing, assembly and annotation of the Ich macronuclear genome. Compared with its free-living relative T. thermophila, the Ich genome is reduced approximately two-fold in length and gene density and three-fold in gene content. We analyzed in detail several gene classes with diverse functions in behavior, cellular function and host immunogenicity, including protein kinases, membrane transporters, proteases, surface antigens and cytoskeletal components and regulators. We also mapped by orthology Ich{\textquoteright}s metabolic pathways in comparison with other ciliates and a potential host organism, the zebrafish Danio rerio. Conclusions: Knowledge of the complete protein-coding and metabolic potential of Ich opens avenues for rational testing of therapeutic drugs that target functions essential to this parasite but not to its fish hosts. Also, a catalog of surface protein-encoding genes will facilitate development of more effective vaccines. The potential to use T. thermophila as a surrogate model offers promise toward controlling {\textquoteright}white spot{\textquoteright} disease and understanding the adaptation to a parasitic lifestyle.}, doi = {10.1186/gb-2011-12-10-r100}, author = {Coyne, Robert S. and Hannick, Linda and Shanmugam, Dhanasekaran and Hostetler, Jessica B. and Brami, Daniel and Joardar, Vinita S. and Johnson, Justin and Radune, Diana and Singh, Irtisha and Badger, Jonathan H. and Kumar, Ujjwal and Saier, Milton and Wang, Yufeng and Cai, Hong and Gu, Jianying and Mather, Michael W. and Vaidya, Akhil B. and Wilkes, David E. and Rajagopalan, Vidyalakshmi and Asai, David J. and Pearson, Chad G. and Findly, Robert C. and Dickerson, Harry W. and Wu, Martin and Martens, Cindy and Van de Peer, Yves and Roos, David S. and Cassidy-Hanley, Donna M. and Clark, Theodore G.} } @article { ISI:000289973100006, title = {Dynamic mechanical and perforation impact behavior of all-PP composites containing beta-nucleated random PP copolymer as matrix and stretched PP homopolymer tape as reinforcement: effect of draw ratio of the tape}, journal = {Journal of Thermoplastic Composite Materials}, volume = {24}, number = {3}, year = {2011}, month = {MAY}, pages = {377-388}, publisher = {SAGE PUBLICATIONS LTD}, address = {1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND}, abstract = {

Cross-ply all-polypropylene (PP) composite laminates were prepared by hot consolidation after tape winding combined with film stacking. Alpha (alpha) PP tapes of different draw ratios (DR = 8 and 12), produced by online extrusion stretching, served as reinforcements. Beta (beta)-nucleated random PP copolymer, introduced in the form of a film, composed the matrix. The E-modulus of the PP tapes increased whereas their density decreased with increasing DR. The volume fraction of the reinforcement and the void content were estimated using optical microscopic images. The all-PP composites were subjected to dynamic mechanical thermal analysis, flexural, and instrumented falling weight impact tests. It was found that with increasing draw ratio of the alpha-PP tapes, the stiffness, strength, and perforation resistance of the composites were improved.

}, keywords = {all-polypropylene composite, draw ratio, dynamic mechanical thermal analysis, instrumented falling weight impact, polypropylene}, issn = {0892-7057}, doi = {10.1177/0892705710391402}, author = {Abraham, Thomas N. and Wanjale, S. and Siengchin, S. and Karger-Kocsis, Jozsef} } @article { ISI:000294437300035, title = {Ecofriendly hydrogen production from abundant hydrogen sulfide using solar light-driven hierarchical nanostructured ZnIn2S4 photocatalyst}, journal = {Green Chemistry}, volume = {13}, number = {9}, year = {2011}, month = {JUL}, pages = {2500-2506}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

It is quite well-known that refineries are producing huge amount of H2S which has been used to produce sulphur and water using the well-known Claus process. This process is not an economically viable process, due to the high-cost chemical process and creates further acute environmental problems. Therefore, we have demonstrated the conversion of poisonous H2S into H-2 using an ecofriendly phocatalysis process which is a green unconventional energy source. We have investigated ecofriendly nanostructured ZnIn2S4 photocatalyst to produce hydrogen from H2S using solar light. We also demonstrate the controlled synthesis of hierarchical nanostructured ZnIn2S4 using a facile hydrothermal method. The morphologies obtained have been greatly influenced by the presence of triethylamine (TEA) with various concentrations during the reaction. Surprisingly, a highly crystalline hexagonal layer structured ZnIn2S4 was obtained instead of cubic spinel. The hierarchical nanostructure, i.e. marigold flower-like morphology, was obtained without any surfactant. The thin and transparent petals self-assembled to form the unique nanostructured marigold flower. The highly crystalline puffy marigold flowers and nanoplates/nanostrips were obtained using TEA-assisted hydrothermal synthesis. Optical study shows the band gap in the range of 2.34-2.48 eV. Considering the band gap in the visible region, ZnIn2S4 is used as photocatalyst for hydrogen production from hydrogen sulphide under solar light which is hitherto unattempted. The constant photocatalytic activity of hydrogen evolution, i.e. 5287 mu mol h(-1), was obtained using such hierarchical nanostructured ZnIn2S4 under visible light irradiation. It is noteworthy that the H-2 evolution rate obtained is much higher compared to earlier reported photocatalysts. Considering the significance of morphologies for photocatalytic application, the formation mechanism has also been furnished. The unique hierarchical nanostructured ZnIn2S4 ternary semiconductor having hexagonal layer will have potential applications in solar cells, LEDs, charge storage, electrochemical recording, thermoelectricity and other prospective electronic and optical devices.

}, issn = {1463-9262}, doi = {10.1039/c1gc15515f}, author = {Chaudhari, Nilima S. and Bhirud, Ashwini P. and Sonawane, Ravindra S. and Nikam, Latesh K. and Warule, Sambhaji S. and Rane, Vilas H. and Kale, Bharat B.} } @article { ISI:000289376200002, title = {Electrochemical fluorescence switching from a patternable poly(1,3,4-oxadiazole) thin film}, journal = {Macromolecular Rapid Communications}, volume = {32}, number = {8}, year = {2011}, month = {APR}, pages = {637-643}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

A highly soluble poly(1,3,4-oxadiazole) (POD) substituted with long alkyl chains was examined for electrochemical fluorescence switching. The high solubility of the polymers enabled a simple fabrication of an electrochemical cell, which showed reversible fluorescence switching between dark (n-doping) and bright (neutral) states with a maximum on/off ratio of 2.5 and a cyclability longer than 1000 cycles. Photochemical cleavage of the oxadiazole in POD allowed photo-patterning of the POD film upon exposure to UV source. The patterned POD films displayed patterned image reversibly under a step potential of +1.8/-1.8V.

}, keywords = {fluorescence, lithography, Luminescence, photochemistry, switching device}, issn = {1022-1336}, doi = {10.1002/marc.201000791}, author = {Seo, Seogjae and Kim, Yuna and You, Jungmok and Sarwade, Bhimrao D. and Wadgaonkar, Prakash P. and Menon, Shamal K. and More, Arvind S. and Kim, Eunkyoung} } @article { ISI:000285387600001, title = {Greener ullmann-type coupling of aryl halides for preparing biaryls using reusable Pd/ZrO2 catalyst}, journal = {Synthetic Communications}, volume = {41}, number = {2}, year = {2011}, month = {JAN}, pages = {PII 931249796}, publisher = {TAYLOR \& FRANCIS INC}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

Biaryls with excellent yields can be prepared by the Ullmann-type coupling of aryl halides in the presence of potassium carbonate (as a base) and dimethylformamide (as a solvent), at 140 degrees C, using a reusable Pd (2.5wt\%)/ZrO2 catalyst. The product yield of 4-iodoanisole coupling is strongly influenced by the catalyst preparation method, solvent, and base.

}, keywords = {Aryl halides, Biaryls, Pd, Ullmann coupling reaction, ZrO2}, issn = {0039-7911}, doi = {10.1080/00397910903531805}, author = {Dumbre, Deepa K. and Wakharkar, Radhika D. and Choudhary, Vasant R.} } @article { ISI:000294158700021, title = {Intramolecular chemoselective acylation of a suitably substituted isoindole: synthesis of (+/-)-chilenine and (+/-)-deoxychilenine}, journal = {Synthesis-Stuttgart}, number = {17}, year = {2011}, month = {SEP}, pages = {2838-2842}, publisher = {GEORG THIEME VERLAG KG}, address = {RUDIGERSTR 14, D-70469 STUTTGART, GERMANY}, abstract = {

Starting from 3,4-dimethoxyhomophthalic anhydride and 6-bromohomopiperonylamine, concise and efficient syntheses of Chilean berberis products chilenine and deoxychilenine have been demonstrated via partially divergent routes by taking advantage of facile air-oxidation of homophthalimide along with intramolecular chemoselective acylation as the key steps.

}, keywords = {chemoselective acylation, chilenine, deoxychilenine, homophthalic anhydride, isoindole, Total synthesis}, issn = {0039-7881}, doi = {10.1055/s-0030-1260140}, author = {Wakchaure, Prasad B. and N. P. Argade} } @article { ISI:000298210100002, title = {Lithium tetrafluoroborate catalyzed highly efficient inter- and intramolecular aza-Michael addition with aromatic amines}, journal = {Comptes Rendus Chimie}, volume = {14}, number = {12}, year = {2011}, month = {DEC}, pages = {1059-1064}, publisher = {ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER}, address = {23 RUE LINOIS, 75724 PARIS, FRANCE}, abstract = {

Lithium tetrafluoroborate has been demonstrated for the first time to be an efficient catalyst in intermolecular aza-Michael addition aromatic amines to electron deficient alkenes. Suitability of the same catalyst in intramolecular aza-Michael addition leading 2-aryl-2,3-dihydroquinolin-4(1H) ones has also been described. (C) 2011 Published by Elsevier Masson SAS on behalf of Academie des sciences.

}, keywords = {2-aryl-2, 3-dihydroquinolin-(4H)-1-ones, Anilines, Lithium tetrafluoroborate, Michael addition}, issn = {1631-0748}, doi = {10.1016/j.crci.2011.09.006}, author = {Lad, Uday P. and Kulkarni, M. A. and Desai, Uday V. and Wadgaonkar, P. P.} } @article { ISI:000293175800026, title = {Maghemite (hematite) core (shell) nanorods via thermolysis of a molecular solid of Fe-complex}, journal = {Dalton Transactions}, volume = {40}, number = {31}, year = {2011}, month = {2011}, pages = {8003-8011}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

An Fe-metal complex with 2{\textquoteright}-hydroxy chalcone (2{\textquoteright}-HC) ligands [Fe(III) (2{\textquoteright}-hydroxy chalcone) 3] is synthesized by a chemical route and is subjected to different thermal treatments. Upon thermolysis in air at 450 degrees C for 3 h the complex yields maghemite (gamma-Fe(2)O(3)) nanorods with a thin hematite (alpha-Fe(2)O(3)) shell. X-Ray diffraction (XRD), Mossbauer spectroscopy, diffuse reflectance spectroscopy (UV-DRS), high resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM) and vibrating sample magnetometry (VSM) are used to characterize the samples. The stability of the ligand and the Fe-complex is further examined by using thermogravimmetric/differential thermal analysis (TGA/DTA). We suggest a residual ligand controlled mechanism for the formation of an anisotropic nanostructure in a crumbling molecular solid undergoing ligand decomposition. Since the band gap of iron oxide is in the visible range, we explored the use of our core shell nano-rod sample for photocatalytic activity for H(2) generation by H(2)S splitting under solar light. We observed high photocatalytic activity for hydrogen generation (75 ml h(-1)).

}, issn = {1477-9226}, doi = {10.1039/c1dt10319a}, author = {Chaudhari, N. S. and Warule, S. S. and Muduli, Subas and Kale, B. B. and Jouen, Samuel and Lefez, Benoit and Hannoyer, Beatrice and Ogale, Satishchandra B.} } @article { ISI:000285390900010, title = {Main-chain supramolecular block copolymers}, journal = {Chemical Society Reviews}, volume = {40}, number = {1}, year = {2011}, month = {JAN}, pages = {129-137}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Block copolymers are key building blocks for a variety of applications ranging from electronic devices to drug delivery. The material properties of block copolymers can be tuned and potentially improved by introducing noncovalent interactions in place of covalent linkages between polymeric blocks resulting in the formation of supramolecular block copolymers. Such materials combine the microphase separation behavior inherent to block copolymers with the responsiveness of supramolecular materials thereby affording dynamic and reversible materials. This tutorial review covers recent advances in main-chain supramolecular block copolymers and describes the design principles, synthetic approaches, advantages, and potential applications.

}, issn = {0306-0012}, doi = {10.1039/c0cs00073f}, author = {Yang, Si Kyung and Ambade, Ashootosh V. and Weck, Marcus} } @article { ISI:000292455700027, title = {Money handling and obesity: a test of the exaptation hypothesis}, journal = {Current Science}, volume = {100}, number = {11}, year = {2011}, month = {JUN}, pages = {1695-1700}, publisher = {INDIAN ACAD SCIENCES}, address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA}, abstract = {

The food reward centres in the brain play a central role in the regulation of food intake and thereby obesity. In the modern lifestyle, a number of artificial rewards such as money have been introduced and brain areas evolved for handling food rewards appear to be exapted to handle money and other rewards. This implies that the changing behaviour related to these rewards could influence obesity. Considering money as a reward, we conducted a survey of 211 full-time cashiers to test whether ownership over cash, amount of cash handled and duration of cash-handling work correlated with obesity parameters. Body mass index was significantly affected by sex, ownership, amount of money handled and duration of cash-handling service. Waist-to-hip ratio was significantly affected by sex, amount of money handled and marginally by ownership. The results are compatible with the exaptation hypothesis. It is possible that increasing importance of non-food rewards may play a significant role in the obesity epidemic.

}, keywords = {Body weight, economics of obesity, exaptation hypothesis, money handling}, issn = {0011-3891}, author = {Karve, Shraddha and Shurpali, Ketaki and Dahanukar, Neelesh and Paranjape, Sharayu and Jog, Maithili and Belsare, Prajakta and Watve, Milind} } @article { ISI:000295259700041, title = {N-Heterocyclic carbene catalyzed umpolung of michael acceptors for intermolecular reactions}, journal = {Angewandte Chemie-International Edition}, volume = {50}, number = {36}, year = {2011}, month = {AUG}, pages = {8412-8415}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

eahciM! The N-heterocyclic carbene catalyzed umpolung of Michael acceptors proceeds through the formation of a deoxy-Breslow intermediate (see scheme; EWG=electron-withdrawing group). This nucleophilic species can react with other Michael acceptors in an intermolecular fashion, thereby resulting in the formation of homo- or heterodimeric olefins. This {\textquotedblleft}Michael umpolung{\textquotedblright} should become a valuable method for the formation of densely functionalized olefins.

}, keywords = {carbenes, Michael acceptors, nitrogen heterocycles, organocatalysis, umpolung}, issn = {1433-7851}, doi = {10.1002/anie.201103555}, author = {Biju, Akkattu T. and Padmanaban, Mohan and Wurz, Nathalie E. and Glorius, Frank} } @article { ISI:000287273000004, title = {One-pot three-component kabachnik-fields synthesis of alpha-aminophosphonates using H-beta zeolite catalyst}, journal = {Tetrahedron Letters}, volume = {52}, number = {8}, year = {2011}, month = {FEB}, pages = {863-866}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

One-pot three-component Kabachnik-Fields synthesis of alpha-aminophosphonates with high yields from the reaction between carbonyl compound, primary amine, and substituted phosphite can be carried out in a short period, using H-beta zeolite as a reusable catalyst. (C) 2010 Elsevier Ltd. All rights reserved.

}, keywords = {Carbonyl compound, H-beta zeolite, Primary amine, Substituted phosphite}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2010.11.105}, author = {Tillu, V. H. and Dumbre, Deepa K. and Wakharkar, R. D. and Choudhary, Vasant R.} } @article {42521, title = {Photoactive RuII-polypyridyl complexes that display sequence selectivity and high-affinity binding to duplex DNA through groove binding}, journal = {Chemistry A European Journal}, volume = {17}, year = {2011}, month = {FEB}, pages = {2089{\textendash}2098}, abstract = {

The duplex-DNA binding properties of a nonintercalating polypyridyl ruthenium(II) complex that incorporates a linear extended ligand with a catechol moiety has been probed with a variety of photo- and biophysical techniques. These studies reveal that the complex groove binds to DNA sequences biphasically, and displays binding constants equivalent to those of high-affinity metallointercalators. The complex also displays preferential binding to AT-rich sequences. Changes in the structure of the coordinated catechol ligand and the incorporation of intercalating ancillary ligands into the complex were found to modulate both the optical-binding response and binding parameters of the system, which indicates that the catechol moiety plays a crucial role in the observed enhancement to binding affinities.

}, doi = {10.1002/chem.201002149}, author = {Ghosh, Amrita and Das, Priyadip and Gill, Martin R. and Kar, Prasenjit and Walkar, Michael G. and Thomas, Jim A. and Das, Amitava} } @article { ISI:000291605900010, title = {Polyamides containing quinoxaline moiety}, journal = {Journal of Polymer Research}, volume = {18}, number = {4}, year = {2011}, month = {JUL}, pages = {549-557}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

A new quinoxaline moiety containing aromatic diamine; 2,3-bis[4-(4-aminophenoxy)phenyl]quinoxaline (APQ) was synthesized starting from 4-methoxybenzaldehyde and was characterized by IR, (1)H, (13)C NMR and Mass spectrometry. Five new polyamides were synthesized by polycondensation of various aliphatic diacid / aromatic diacids namely, azelaic acid, bis(4-carboxyphenyl)dimethylsilane, 4,4{\textquoteright}-oxybis(benzoicacid), isophthalic acid and terephthalic acid with APQ by Yamazaki{\textquoteright}s phosphorylation method using triphenyl phosphite as condensing agent. The polyamides were characterized by IR spectroscopy, solubility tests, inherent viscosity, X-ray diffraction technique, differential scanning colorimetry and thermogravimetric analysis. The polyamides had inherent viscosities in the range 0.39-0.45 dL/g in N, N-dimethylacetamide at 30 +/- 0.1 A degrees C. The polyamides were soluble in polar aprotic solvents such as N, N-dimethylacetamide, N, N-dimethylformamide, dimethylsulfoxide, N-methylpyrrolidone. X-Ray diffraction studies showed that polyamides were amorphous in nature. The polyamides showed glass transition temperatures in the range 104-205 A degrees C, according to differential scanning calorimetry. Thermogravimetric analysis exhibited initial decomposition temperatures above 348 A degrees C; indicating that these polyamides possessed excellent thermal stability.

}, keywords = {polyamides, Quinoxaline, solubility, Thermal properties, XRD}, issn = {1022-9760}, doi = {10.1007/s10965-010-9448-7}, author = {Patil, Vidyadhar B. and Sayyed, Maheboob M. and Mahanwar, Prakash A. and Wadgaonkar, Prakash P. and Maldar, Noormahamad N.} } @article { ISI:000293849200017, title = {Poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing cardo decahydronaphthalene groups: synthesis and characterization}, journal = {Journal of Applied Polymer Science}, volume = {122}, number = {3}, year = {2011}, month = {NOV}, pages = {1607-1613}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

New poly(ether ether ketone)s and poly (ether ether ketone ketone) s were synthesized by polycondensation of each of the three bisphenols, viz., 4,4{\textquoteright}-(octahydro-2(1H)-naphthylidene) bisphenol, 4,4{\textquoteright}-(octa-hydro-2(1H)-naphthylidene) bis-3-methylphenol, and 4,4{\textquoteright}(octahydro-2(1H)-naphthylidene) bis-3,5-dimethylphenol with 4,4{\textquoteright}-difluorobenzophenone and 1,3-bis(4-fluorobenzoyl) benzene in a mixture of N,N-dimethylacetamide and toluene [1 : 1 (v/v)] in the presence of anhydrous potassium carbonate. Inherent viscosities of poly(ether ether ketone) s and poly (ether ether ketone ketone) s were in the range 0.32-0.80 dL/g and number-average molecular weights were in the range 16,100-55,900 g/mol. Poly(ether ether ketone) s and poly(ether ether ketone ketone) s were soluble in organic solvents such as dichloromethane, chloroform, tetrahydrofuran, meta-cresol, pyridine, and 1-methyl-2-pyrrolidinone at room temperature and could be cast into tough, transparent, and flexible films from their chloroform solutions. Wide angle x-ray diffraction measurements revealed the amorphous nature of poly(ether ether ketone) s and poly (ether ether ketone ketone) s. The glass transition temperature poly(ether ether ketone) s and poly(ether ether ketone ketone) s were in the range 185-251 degrees C. The temperature at 10\% weight loss, determined from thermogravimetric analysis, of poly(ether ether ketone) s and poly(ether ether ketone ketone) s in nitrogen atmosphere was in the range 462-493 degrees C indicating their good thermal stability. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 1607-1613, 2011

}, keywords = {bisphenol, cardo decahydronaphthalene, poly(ether ether ketone ketone)s, poly(ether ether ketone)s, Polycondensation, Thermal properties}, issn = {0021-8995}, doi = {10.1002/app.33921}, author = {Honkhambe, Pandurang N. and Pasale, Sharad K. and Bhairamadgi, Nagendra S. and Kumbhar, Kishor P. and Salunkhe, Manikrao M. and Wadgaonkar, Prakash P.} } @article { ISI:000291960800006, title = {Regioselective NaBH4 and DIBAL-H reductions of 3,4-dimethoxyhomopiperonylphthalimide: concise and efficient synthesis of nuevamine and isonuevamine}, journal = {Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry}, volume = {50}, number = {6}, year = {2011}, month = {JUN}, pages = {868-871}, publisher = {COUNCIL SCIENTIFIC \& INDUSTRIAL RES}, address = {ANUSANDHAN BHAWAN, 2 RAFI MARG, NEW DELHI, 110001, INDIA}, abstract = {

Facile synthesis of nuevamine and isonuevamine has been reported via the regioselectivc reduction of hindered and unhindered carbonyl groups of 3,4-dimethoxyhomopiperonylphthalimide, respectively using sodium borohydridc and diisobutylaluminum hydride, Mowed by an acid catalyzed intramolecular dehydrative cyclization pathways. The chemistry involved in obtaining the regioselectivity has been discussed in brief.

}, keywords = {6-dimethoxyhomophthalimide, intramolecular dehydrative cyclizations, isonuevamine, N-Homopiperonyl-5, nuevamine, regioselective reductions, synthesis}, issn = {0376-4699}, author = {Wakchaure, Prasad B. and Kunte, Sunita S. and N. P. Argade} } @article {42451, title = {Synthesis and application of a chiral diborate}, journal = {Journal of Organic Chemistry}, volume = {76}, year = {2011}, month = {MAR}, pages = {2324{\textendash}2327}, abstract = {

A chiral diborate with different counterions is reported whose structure was unambiguously confirmed by X-ray analysis. This chiral dianion was used in the resolution of trans-1,2-diamines and also as a chiral shift reagent for NMR analysis of triphenylphosphonium salts.

}, doi = {10.1021/jo102559s}, author = {Loewer, Yvonne and Weiss, Christine and Biju, Akkattu T. and Frohlich, Roland and Glorius, Frank} } @article { ISI:000297269700002, title = {Synthesis and characterization of new organosoluble aromatic polyamides and polyazomethines containing pendent pentadecyl chains}, journal = {High Performance Polymers}, volume = {23}, number = {7}, year = {2011}, month = {NOV}, pages = {494-505}, publisher = {SAGE PUBLICATIONS LTD}, address = {1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND}, abstract = {

New aromatic polyamides and polyazomethines containing pendent pentadecyl chains were synthesized by polycondensation of pentadecylbenzene-1,3-diamine with (i) four commercially available aromatic diacids, viz., biphenyl-4,4{\textquoteright}dicarboxylic acid, 4,4{\textquoteright}-oxybisbenzoic acid, terephthalic acid and isophthalic acid, and (ii) dialdehydes, viz., terephthaldehyde, isophthaldehyde and a 50 : 50 mol\% mixture of terephthaldehyde, and isophthaldehyde, respectively. Inherent viscosities of polyamides and polyazomethines were in the range 0.35-0.56 dL g(-1) and 0.33-0.38 dL g(-1), respectively, indicating the formation of medium molecular weight polymers. The presence of pendent pentadecyl chains in polyamides and polyazomethines led to an improvement in their solubility in organic solvents. Polyamides could be cast into flexible, transparent and tough films from their solution in N,N-dimethylacetamide while polyazomethines could be solution cast into transparent, flexible and stretchable films from their CHCl(3) solution. (1)H-NMR studies based on amide proton signals and azomethine proton signals indicated the presence of constitutional isomerism in the polyamides and polyazomethines. Wide-angle X-ray diffraction patterns exhibited broad halo indicating that the polymers were amorphous in nature. X-ray diffractograms also displayed sharp reflections in the small angle region (2 theta approximate to 3 degrees) indicating the formation of layered structure arising from packing of flexible pentadecyl chains. The glass transition (T(g)) temperatures of polyamides were in the range 169-215 degrees C while T(g) values for polyazomethines were in the range 16-55 degrees C. The temperature for the 10\% weight loss of polyamides and polyazomethines were in the range 430-460 degrees C and 425-440 degrees C, respectively, in a nitrogen atmosphere, which indicated their good thermal stability. Polyazomethines were also characterized by UV-Vis and photoluminescence spectroscopy and optical band gap (E(g)) values, calculated according to the maximum of the UV absorption, were found to be in the range 2.82-3.10 eV.

}, keywords = {High performance polymers, optical band gap, polyamides, polyazomethines, solubility}, issn = {0954-0083}, doi = {10.1177/0954008311417316}, author = {Sadavarte, Nilakshi V. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article { ISI:000291613900071, title = {Synthesis and characterization of organo-soluble poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing pendant pentadecyl chains}, journal = {Journal of Applied Polymer Science}, volume = {121}, number = {6}, year = {2011}, month = {SEP}, pages = {3689-3695}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Poly(ether ether ketone)s and poly(ether ether ketone ketone) s containing pendant pentadecyl chains were synthesized by polycondensation of each of the two bisphenol monomers viz, 1,1,1-[bis(4-hydroxyphenyl)-4{\textquoteright}-pentadecylphenyl] ethane and 1,1-bis(4-hydroxyphenyl)-3-pentadecyl cyclohexane with activated aromatic dihalides namely, 4,4{\textquoteright}-difluorobenzophenone, and 1,3-bis(4-fluorobenzoyl) benzene in a solvent mixture of N,N-dimethylacetamide and toluene, in the presence of anhydrous potassium carbonate. Polymers were isolated as white fibrous materials with inherent viscosities and number average molecular weights in the range 0.70-1.27 dL g(-1) and 76,620-1,36,720, respectively. Poly(ether ether ketone) s and poly(ether ether ketone ketone) s were found to be soluble at room temperature in organic solvents such as chloroform, dichloromethane, tetrahydrofuran, and pyridine and could be cast into tough, transparent, and flexible films from their solutions in chloroform. Wide angle X-ray diffraction patterns exhibited a broad halo at around 2 theta = similar to 19 degrees indicating that the polymers containing pentadecyl chains were amorphous in nature. In the small-angle region, diffuse reflections of a typically layered structures resulting from the packing of pentadecyl side chains were observed. The temperature at 10\% weight loss, obtained from TG curves, for poly(ether ether ketone) s and poly(ether ether ketone ketone) s were in the range 416-459 degrees C, indicating their good thermal stability. A substantial drop in glass transition temperatures (68-78 degrees C) was observed for poly(ether ether ketone) s and poly(ether ether ketone ketone) s due to {\textquoteleft}{\textquoteleft}internal plasticization{\textquoteright}{\textquoteright} effect of flexible pendant pentadecyl chains. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 3689-3695, 2011

}, keywords = {alkyl side-chain, Cashew nut shell liquid, CNSL, pentadecyl, poly(arylene ether)s, poly(ether ketone)s, polyethers, renewable}, issn = {0021-8995}, doi = {10.1002/app.34181}, author = {More, Arvind S. and Pasale, Sharad K. and Honkhambe, Pandurang N. and Wadgaonkar, Prakash P.} } @article { ISI:000293939800014, title = {Synthesis of bis-allyloxy functionalized polystyrene and poly (methyl methacrylate) macromonomers using a new ATRP initiator}, journal = {European Polymer Journal}, volume = {47}, number = {8}, year = {2011}, month = {AUG}, pages = {1621-1629}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A new bis-allyloxy functionalized ATRP initiator, viz, 4,4-bis (4-(allyloxy) phenyl) penty1-2-bromo-2-methylpropanoate was synthesized starting from commercially available 4,4-bis (4-hydroxyphenyl) pentanoic acid. Atom transfer radical polymerization of styrene in bulk and that of methyl methacrylate in anisole using CuBr/N,N,N{\textquoteright},N{\textquoteright},N {\textquoteleft}{\textquoteright}-pentamethyldiethyl-enetriamine system was carried out. The kinetic study of styrene polymerization showed controlled polymerization behavior. Bis-allyloxy functionalized well-defined polystyrene (M(n)(GPC): 13,600-28,250, PDI: 1.07-1.09) and poly (methyl methacrylate) (M(n)(GPC): 10,100-18,450, PDI: 1.23-1.34) macromonomers were obtained. The presence of allyloxy functionality was confirmed by (1)H NMR spectroscopy. The reactivity of allyloxy functionality was demonstrated by carrying out organic reactions such as addition of bromine and hydrosilylation on polystyrene macromonomer. Polystyrene macromonomer with bis-allyloxy functionality was transformed into bis-epoxy functionalized polystyrene macromonomer using 3-chloroperoxybenzoic acid. (C) 2011 Elsevier Ltd. All rights reserved.

}, keywords = {Allyloxy end-functional polymer, Atom transfer radical polymerization (ATRP), Macromonomers, Poly (methyl methacrylate), Polystyrene}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2011.05.012}, author = {Sane, Prakash S. and Palaskar, Dnyaneshwar V. and Wadgaonkar, Prakash P.} } @article { ISI:000309096400007, title = {Aromatic aldehyde functionalized polycaprolactone and polystyrene macromonomers: synthesis, characterization and aldehyde-aminooxy click reaction}, journal = {Reactive \& Functional Polymers}, volume = {72}, number = {10}, year = {2012}, month = {OCT}, pages = {713-721}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

New bis-aldehyde functionalized initiators, viz, 4,4{\textquoteright}-(4,4{\textquoteright}-(5-hydroxypentane-2,2-diyl)bis(4,1-phenylene))bis(oxy)dibenza ldehyde (1) and 4,4{\textquoteright}-bis(4-(4-(formylphenoxy) phenyl) pentyl 2-bromopropanoate (2) were synthesized starting from commercially available 4,4{\textquoteright}-bis(4-hydroxyphenyl) pentanoic acid. These initiators were utilized, respectively, for ring opening polymerization of E-caprolactone and atom transfer radical polymerization of styrene. Well-defined polycaprolactone macromonomers (M-n(GPC): 2600-19400, PDI: 1.37-1.47) and polystyrene macromonomers (M-n(GPC): 2800-28200, PDI: 1.11-1.16) with bis-aldehyde functionality were synthesized. The kinetic study of styrene polymerization showed controlled polymerization behaviour. The presence of aldehyde functionality in macromonomers was confirmed by H-1 NMR spectroscopy. The reactivity of aldehyde functionality was demonstrated by carrying out aldehyde-aminooxy click reaction of polycaprolactone macromonomer with O-(2-azidoethyl) hydroxylamine which proceeded in a quantitative manner without backbone degradation. (C) 2012 Elsevier Ltd. All rights reserved.

}, keywords = {Aldehyde-terminated macromonomers, ATRP, Polycaprolactone, Polystyrene, ROP}, issn = {1381-5148}, doi = {10.1016/j.reactfunctpolym.2012.06.020}, author = {Sane, Prakash S. and Tawade, Bhausaheb V. and Palaskar, Dnyaneshwar V. and Menon, Shamal K. and Wadgaonkar, Prakash P.} } @article { ISI:000312233600006, title = {Carbon nanoscrolls by pyrolysis of a polymer}, journal = {Solid State Communications}, volume = {152}, number = {23}, year = {2012}, month = {DEC}, pages = {2092-2095}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

3D network of carbon nanoscrolls was synthesized starting from pyrolysis of poly(acrylic acid-co-maleic acid) sodium salt. It is a catalyst-free process where pyrolysis of polymer leads to formation of carbon form and sodium carbonate. Upon water soaking of pyrolysis product, the carbon form undergoes self-assembly to form carbon nanoscrolls. The interlayer distance between the walls of carbon nanoscroll was found to be 0.34 nm and the carbon nanoscrolls exhibited a surface area of 188 m(2)/g as measured by the BET method. (c) 2012 Elsevier Ltd. All rights reserved.

}, keywords = {Carbon nanoscrolls, Polymer, Pyrolysis, supercapacitor}, issn = {0038-1098}, doi = {10.1016/j.ssc.2012.08.029}, author = {Yadav, Prasad and Warule, Sambhaji and Jog, Jyoti Prakash and Ogale, Satishchandra B.} } @article {43249, title = {Comparative genomics of the apicomplexan parasites toxoplasma gondii and neospora caninum: coccidia differing in host range and transmission strategy}, journal = {Plos Pathogens}, volume = {8}, year = {2012}, month = {MAR}, abstract = {Toxoplasma gondii is a zoonotic protozoan parasite which infects nearly one third of the human population and is found in an extraordinary range of vertebrate hosts. Its epidemiology depends heavily on horizontal transmission, especially between rodents and its definitive host, the cat. Neospora caninum is a recently discovered close relative of Toxoplasma, whose definitive host is the dog. Both species are tissue-dwelling Coccidia and members of the phylum Apicomplexa; they share many common features, but Neospora neither infects humans nor shares the same wide host range as Toxoplasma, rather it shows a striking preference for highly efficient vertical transmission in cattle. These species therefore provide a remarkable opportunity to investigate mechanisms of host restriction, transmission strategies, virulence and zoonotic potential. We sequenced the genome of N. caninum and transcriptomes of the invasive stage of both species, undertaking an extensive comparative genomics and transcriptomics analysis. We estimate that these organisms diverged from their common ancestor around 28 million years ago and find that both genomes and gene expression are remarkably conserved. However, in N. caninum we identified an unexpected expansion of surface antigen gene families and the divergence of secreted virulence factors, including rhoptry kinases. Specifically we show that the rhoptry kinase ROP18 is pseudogenised in N. caninum and that, as a possible consequence, Neospora is unable to phosphorylate host immunity-related GTPases, as Toxoplasma does. This defense strategy is thought to be key to virulence in Toxoplasma. We conclude that the ecological niches occupied by these species are influenced by a relatively small number of gene products which operate at the host-parasite interface and that the dominance of vertical transmission in N. caninum may be associated with the evolution of reduced virulence in this species.}, doi = {10.1371/journal.ppat.1002567}, author = {Reid, Adam James and Vermont, Sarah J. and Cotton, James A. and Harris, David and Hill-Cawthorne, Grant A. and Koenen-Waisman, Stephanie and Latham, Sophia M. and Mourier, Tobias and Norton, Rebecca and Quail, Michael A. and Sanders, Mandy and Shanmugam, Dhanasekaran and Sohal, Amandeep and Wasmuth, James D. and Brunk, Brian and Grigg, Michael E. and Howard, Jonathan C. and Parkinson, John and Roos, David S. and Trees, Alexander J. and Berriman, Matthew and Pain, Arnab and Wastling, Jonathan M.} } @article { ISI:000306771600005, title = {Covalently anchored ruthenium-phosphine complex on mesoporous organosilica: catalytic applications in hydrogenation reactions}, journal = {Catalysis Communications}, volume = {25}, year = {2012}, month = {AUG}, pages = {22-27}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

New heterogeneous catalysts for alkene hydrogenation reactions were prepared by the immobilization of trimethoxysilane functionalized triphenylphosphine eta(6)-p-cymene ruthenium complex on mesoporous organosilica (PMO-Ru). Characterization techniques confirmed the structural integrity of the organosilica material and proved the successful anchoring of ruthenium complex. Catalytic activity and stability of PMO-Ru sample investigated in the hydrogenation of various olefins showed higher activity than a neat and MCM-41 supported ruthenium catalyst. High catalytic activity and stability of organosilica supported ruthenium catalyst are attributed to the hydrophobic environments and to the unique structural features imparted from the presence of organic groups in the framewall positions. (C) 2012 Elsevier B.V. All rights reserved.

}, keywords = {Heterogenization, Hydrogenation, Organosilica, ruthenium, Triphenyl phosphine}, issn = {1566-7367}, doi = {10.1016/j.catcom.2012.04.002}, author = {Sisodiya, Sheetal and Lazar, Anish and Shylesh, Sankaranarayanapillai and Wang, Lei and Thiel, Werner R. and Singh, Anand Pal} } @article {43073, title = {Development and validation of a simple and sensitive RP-HPLC method for simultaneous estimation of drospirenone and ethinylestradiol in combined tablet dosage form}, journal = {International Journal of Pharmacy and Pharmaceutical Sciences}, volume = {4}, year = {2012}, month = {DEC}, pages = {452-457}, author = {Warkad, Shrikant D. and Santhakumari, B. and Chandewar, A. V.} } @article { ISI:000309139400021, title = {Eco-friendly, highly stable and efficient nanostructured p-type N-doped ZnO photocatalyst for environmentally benign solar hydrogen production}, journal = {Green Chemistry}, volume = {14}, number = {10}, year = {2012}, month = {JUL}, pages = {2790-2798}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

We have investigated an economical green route for the synthesis of a p-type N-doped ZnO photocatalyst by a wet chemical method. Significantly, hazardous H2S waste was converted into eco-friendly hydrogen energy using the p-type N-doped ZnO photocatalyst under solar light, which has previously been unattempted. The as-synthesized p-type N-doped ZnO shows a hexagonal wurtzite structure. The optical study shows a drastic shift in the band gap of the doped ZnO in the visible region (3.19-2.3 eV). The doping of nitrogen into the ZnO lattice is conclusively proved from X-ray photoelectron spectroscopy analysis and Raman scattering. The morphological features of the N-doped ZnO are studied from FESEM, TEM and reveal particle sizes to be in the range of similar to 4-5 nm. The N-doped ZnO exhibits enhanced photocatalytic hydrogen generation (similar to 3957 mu mol h(-1)) by photodecomposition of hydrogen sulfide under visible light irradiation, which is much higher as compared to semiconductor metal oxides reported so far. It is noteworthy that a green catalyst is investigated to curtail H2S pollution along with production of hydrogen (green fuel) using solar light, i.e., a renewable energy source. The green process investigated will have the potential to synthesize other N-doped metal oxides.

}, issn = {1463-9262}, doi = {10.1039/c2gc35519a}, author = {Bhirud, Ashwini P. and Sathaye, Shivaram D. and Waichal, Rupali P. and Nikam, Latesh K. and Kale, Bharat B.} } @article { ISI:000301810400032, title = {Efficient lipase purification using reverse micellar extraction}, journal = {Bioresource Technology}, volume = {108}, year = {2012}, month = {MAR}, pages = {224-230}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Reverse micellar extraction (RME) of enzyme provides an attractive option for conventional method with the potential to achieve purification and concentration in a single step with high yield. This study presents a methodology for optimization of RME with Pseudomonas lipase as model system. Fold-purification, percent recovery and extraction time were the objective functions while the type and concentration of surfactant, contact time, pH, ionic strength, and the ratio of organic to aqueous phase were the decision variables. Under optimized conditions, the AOT (Aerosol OT (bis 2-ethylhexyl) sodium sulfosuccinate)-isooctane system gave a 15-fold purification, 80\% recovery and 2.5-fold concentration of the Pseudomonas lipase with process time of 45 min. (C) 2011 Elsevier Ltd. All rights reserved.

}, keywords = {(Hexadicetyltrimethylammoniumbromide), AOT, CTAB, Lipase, RME}, issn = {0960-8524}, doi = {10.1016/j.biortech.2011.11.126}, author = {Gaikaiwari, Raghavendra P. and Wagh, Shilpa A. and Kulkarni, Bhaskar D.} } @article { ISI:000304106900015, title = {Electrostatic grafting of a triphenylphosphine sulfonate on SBA-15: application in palladium catalyzed hydrogenation}, journal = {Catalysis Science \& Technology}, volume = {2}, number = {6}, year = {2012}, month = {FEB}, pages = {1188-1195}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A novel strategy for the immobilization of a sulfonate functionalized triphenylphosphine ligand by ion-ion interactions on an imidazolium modified SBA-15 is presented. A support containing electrostatically grafted triphenylphosphine as the ligand was reacted with PdCl2( CNPh)(2) and the resulting hybrid material catalyzed olefin hydrogenation under mild conditions. The catalyst exhibits excellent activity, selectivity and stability and it can be reused for at least ten times without any loss of activity. An analogous but covalently grafted palladium system does not show any hydrogenation activity under the same conditions. TEM images of the used catalyst clearly prove the absence of palladium nanoparticles. Additionally, XPS investigations prove that palladium( 0) is formed and the phosphine is oxidized. By AAS no palladium contamination down to 0.5 X 10(-4) mmol could be detected in the products and further leaching tests verified the reaction to be truly heterogeneous. This concept of non-covalent immobilization guarantees a tight bonding of the catalytically active species to the surface in combination with a high mobility, which should be favorable for other catalyses, too.

}, issn = {2044-4753}, doi = {10.1039/c2cy00535b}, author = {Wang, Lei and Dehe, Daniel and Philippi, Thomas and Seifert, Andreas and Ernst, Stefan and Zhou, Zhou and Hartmann, Martin and Taylor, Robin N. Klupp and Singh, Anand Pal and Jia, Mingjun and Thiel, Werner R.} } @article { ISI:000302832800039, title = {Extraction and purification of tannase by reverse micelle system}, journal = {Separation and Purification Technology}, volume = {89}, year = {2012}, month = {MAR}, pages = {288-296}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Tannin acyl hydrolase commonly called as tannase (EC 3.1.1.20) is a commercially important enzyme. Partially purified and concentrated tannase is required for commercial applications. Typical objectives of purification process comprise high fold-purification, recovery and concentration. These objectives may be potentially conflicting. Conventional methods of purification require multiple steps which are time consuming and may cause higher loss. Reverse micellar extraction (RME) using ionic surfactants provides an attractive option for concentration and purification of tannase which is a highly hydrophilic glycoprotein. This study presents an optimized methodology for RME and purification of Aspergillus allahabadi intracellular tannase. Fold-purification, percent recovery and extraction time were the objective while the type and concentration of surfactant, contact time, pH, ionic strength, and the ratio of organic to aqueous phase were the decision variables. Some of these parameters were also studied for their effect on back-extraction. Among the surfactants tested, CTAB-isooctane system was found to be suitable. Under optimized conditions, 12.7-fold purification, 81.2\% recovery and 3-fold concentration of tannase with a process time of 45 min was obtained. Conventional purification methods provided a higher fold-purification albeit at a much lower enzyme recovery. Further, the conventional method requires a process time of several hours. (c) 2012 Elsevier B.V. All rights reserved.

}, keywords = {CTAB, Reverse micellar extraction, Tannase}, issn = {1383-5866}, doi = {10.1016/j.seppur.2012.01.043}, author = {Gaikaiwari, Raghavendra P. and Wagh, Shilpa A. and Kulkarni, Bhaskar D.} } @article {43235, title = {First-principle protocol for calculating ionization energies and redox potentials of solvatedmolecules and ions: theory and application to aqueous phenol and phenolate}, journal = {Journal of Physical Chemistry B}, volume = {116}, year = {2012}, month = {JUN}, pages = {7269-7280}, abstract = {The effect of hydration on the lowest vertical ionization energy (VIE) of phenol and phenolate solvated in bulk water was characterized using the equation-of-motion ionization potential coupled-cluster (EOM-IP-CCSD) and effective fragment potential (EFP) methods (referred to as EOM/EFP) and determined experimentally by valence photoemission measurements using microjets and synchrotron radiation. The computed solvent-induced shifts in VIEs (Delta VIEs) are 0.66 and +5.72 eV for phenol and phenolate, respectively. Our best estimates of the absolute values of VIEs (7.9 and 7.7 eV for phenol and phenolate) agree reasonably well with the respective experimental values (7.8 +/- 0.1 and 7.1 +/- 0.1 eV). The EOM/EFP scheme was benchmarked against full EOM-IP-CCSD using microsolvated phenol and phenolate clusters. A protocol for calculating redox potentials with EOM/EFP was developed based on linear response approximation (LRA) of free energy determination. The oxidation potentials of phenol and phenolate calculated using LRA and EOM/EFP are 1.32 and 0.89 V, respectively; they agree well with experimental values.}, doi = {10.1021/jp301925k}, author = {Ghosh, Debashree and Roy, Anirban and Seidel, Robert and Winter, Bernd and Bradforth, Stephen and Krylov, Anna I.} } @article { ISI:000305831300031, title = {From small aromatic molecules to functional nanostructured carbon by pulsed laser-induced photochemical stitching}, journal = {AIP Advances}, volume = {2}, number = {2}, year = {2012}, month = {JUN}, pages = {Article No. 022130}, publisher = {AMER INST PHYSICS}, type = {Article}, address = {CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA}, abstract = {

A novel route employing UV laser pulses (KrF Excimer, 248 nm) to cleave small aromatic molecules and stitch the generated free radicals into functional nanostructured forms of carbon is introduced. The process differs distinctly from any strategies wherein the aromatic rings are broken in the primary process. It is demonstrated that this pulsed laser-induced photochemical stitching (PLPS) process when applied to routine laboratory solvents (or toxic chemical wastes when discarded) Chlorobenzene and o-Dichlorobenzene yields Carbon Nanospheres (CNSs) comprising of graphene-like sheets assembled in onion-like configurations. This room temperature process implemented under normal laboratory conditions is versatile and clearly applicable to the whole family of haloaromatic compounds without and with additions of precursors or other nanomaterials. We further bring out its applicability for synthesis of metal-oxide based carbon nanocomposites. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4721268]

}, issn = {2158-3226}, doi = {10.1063/1.4721268}, author = {Gokhale, R. R. and Thakare, V. P. and Warule, S. and Lefez, Benoit and Hannoyer, Beatrice and Jog, Jyoti Prakash and Ogale, S. B.} } @article { ISI:000311204900021, title = {Microsatellite mapping identifies TTKST-effective stem rust resistance gene in wheat cultivars VL404 and Janz}, journal = {Molecular Breeding}, volume = {30}, number = {4}, year = {2012}, month = {DEC}, pages = {1757-1765}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

Wheat cultivar VL404 carries seedling resistance to Puccinia graminis f. sp. tritici pathotype TTKST. Monogenic segregation for seedling resistance was observed in a VL404/WL711 recombinant inbred line population and the resistance locus was temporarily designated SrVL. Bulked segregant analysis using Diversity Arrays Technology markers located SrVL on chromosome 2BL. Detailed simple sequence repeat mapping placed SrVL between gwm120 and wmc175, both at genetic distances of 3.3 cM. Based on adult plant responses of Janz and VL404 in India and Kenya, we expected these cultivars to carry the same gene against TTKST. A subset of Diamondbird/Janz doubled haploid (DH) population showed monogenic segregation, when tested against TTKST and the locus was temporarily named SrJNZ. SrVL-linked markers gwm120 and wmc175 flanked SrJNZ at a similar genetic distance, thereby confirming our hypothesis. Chromosome 2BL carries Sr9, Sr16 and Sr28. Sr9 is a multi-allelic locus and all known alleles of Sr9 and Sr16 are ineffective against TTKSK and its derivatives. A recombination value of 16.7 cM between Sr9g-linked stripe rust resistance gene Yr7 and SrJNZ in Diamondbird/Janz DH population suggested that SrJNZ is not an allele at the Sr9 locus. Based on comparison of published genetic distances between Lr13, Sr9, Sr28 and Sr16 with that observed in this study, we concluded SrVL and SrJNZ to be Sr28. This gene was contributed by a common parent Gabo, which also exhibited resistance against TTKST. Sr28-linked markers gwm120 and wmc175 confirmed the presence of this gene in a high proportion of Australian cultivars that showed stem rust resistance in Kenya. These markers can be used for marker-assisted pyramiding of Sr28 with other stem rust resistance genes.

}, keywords = {Disease resistance, Markers, Stem rust, Ug99, Wheat}, issn = {1380-3743}, doi = {10.1007/s11032-012-9759-y}, author = {Bansal, Urmil K. and Rebecca S. Zwart and Bhavani, Sridhar and Wanyera, Ruth and Gupta, Vidya and Bariana, Harbans S.} } @article {43381, title = {Multiple H2 occupancy of cages of clathrate hydrate under mild condition}, journal = {Journal of the American Chemical Society}, volume = {134}, year = {2012}, month = {MAY}, pages = {9160 - 9162}, abstract = {Experiments were carried out by reacting H(2) gas with N(2) hydrate at a temperature of 243 K and a pressure of 15 MPa. The characterizations of the reaction products indicated that multiple H(2) molecules can be loaded into both large and small cages of structure II clathrate hydrates. The realization of multiple H(2) occupancy of hydrate cages under moderate conditions not only brings new insights into hydrogen clathrates but also refreshes the perspective of clathrate hydrates as hydrogen storage media.}, doi = {10.1021/ja303222u}, author = {Lu, Hailong and Wang, Jianwei and Liu, Changling and Ratcliffe, Christopher I. and Becker, Udo and Kumar, Rajnish and Ripmeester, John A.} } @article { ISI:000298672800047, title = {New poly(1,3,4-oxadiazole)s bearing pentadecyl side chains: synthesis and characterization}, journal = {Journal of Applied Polymer Science}, volume = {124}, number = {2}, year = {2012}, month = {APR}, pages = {1281-1289}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

The 4-[4{\textquoteright}-(Hydrazinocarbonyl)phenoxy]-2-pentadecylbenzohydrazide was polycondensed with aromatic diacid chlorides viz., terephthalic acid chloride (TPC), isophthalic acid chloride (IPC), and a mixture of TPC : IPC (50 : 50 mol \%) to obtain polyhydrazides which on subsequent cyclodehydration reaction in the presence of phosphoryl chloride yielded new poly(1,3,4-oxadiazole)s bearing flexibilizing ether linkages and pentadecyl side chains. Inherent viscosities of polyhydrazides and poly(1,3,4-oxadiazole)s were in the range 0.530.66 dL g(-1) and 0.490.53 dL g(-1), respectively, indicating formation of medium to reasonably high molecular weight polymers. The number average molecular weights (M-n) and polydispersities (M-w/M-n) of poly(1,3,4-oxadiazole)s were in the range 14,660-21,370 and 2.22.5, respectively. Polyhydrazides and poly(1,3,4-oxadiazole)s were soluble in polar aprotic solvents such as N,N-dimethylacetamide, 1-methyl-2-pyrrolidinone, and N,N-dimethylformamide. Furthermore, poly(1,3,4-oxadiazole)s were also found to be soluble in solvents such as chloroform, dichloromethane, tetrahydrofuran, pyridine, and m-cresol. Transparent, flexible, and tough films of polyhydrazides and poly(1,3,4-oxadiazole)s could be cast from N,N-dimethylacetamide and chloroform solutions, respectively. Both polyhydrazides and poly(1,3,4-oxadiazole)s were amorphous in nature and formation of layered structure was observed due to packing of pentadecyl chains. A decrease in glass transition temperature was observed both in polyhydrazides (143-166 degrees C) and poly(1,3,4-oxadiazole)s (90-102 degrees C) which could be ascribed to internal plasticization effect of pentadecyl chains. The T-10 values, obtained from TG curves, for poly(1,3,4-oxadiazole)s were in the range of 433-449 degrees C indicating their good thermal stability. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 124:1281-1289, 2012

}, keywords = {3, 4-oxadiazole)s, Cashew nut shell liquid, pentadecyl, poly(1, polyhydrazides, thermal stability}, issn = {0021-8995}, doi = {10.1002/app.34682}, author = {More, Arvind S. and Menon, Shamal K. and Wadgaonkar, Prakash P.} } @article { ISI:000302634800023, title = {Organization of cubic CeO2 nanoparticles on the edges of self assembled tapered ZnO nanorods via a template free one-pot synthesis: significant cathodoluminescence and field emission properties}, journal = {Journal of Materials Chemistry}, volume = {22}, number = {18}, year = {2012}, month = {MAR}, pages = {8887-8895}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

The present investigation explores the controlled architecture of a CeO2-ZnO nanocomposite via a template-free, low temperature, facile single step solvothermal approach. This complex architecture depicts cubic single crystalline CeO2 nanoparticles (size similar to 15 nm) grown on the edges of tapered ZnO nanorods with definite orientations and alignments. The formation of wurtzite ZnO, cubic CeO2 and the coexistence of Ce3+ and Ce4+ on the surface of the CeO2-ZnO nanocomposites are confirmed using various characterization tools. The finding of such unique nanostructures by a facile method is exemplified by a plausible growth mechanism. Surprisingly, the aqueous mediated ultrasonication reaction conferred the formation of crystalline ZnO nanotubes of diameter similar to 50 nm. Spatially resolved cathodoluminescence spectra are obtained by linearly scanning an individual CeO2-ZnO nanorod along its length, which reveals the size-dependent surface effects. Interestingly, such hybrid CeO2-ZnO nanoarchitecture is observed to exhibit enhanced field emission properties, demonstrating better current stability as compared to other ZnO nanostructures. This is attributed mainly to strong surface interactions between the Ce-ionic species and the ZnO nanorods. Herein, a soft-chemical approach is used for the first time to architect a binary oxide nanostructure, which is otherwise accomplished using high temperature techniques, as reported elsewhere. Also, the present work not only gives insight into understanding the hierarchical growth behaviour of the CeO2-ZnO nanocomposite in a solution phase synthetic system, but also provides an efficient route to enhance the field emission performance of ZnO nanostructures, which could be extended to other potential applications, such as chemical sensors, optoelectronic devices and photocatalysts.

}, issn = {0959-9428}, doi = {10.1039/c2jm30226h}, author = {Warule, Sambhaji S. and Chaudhari, Nilima S. and Kale, Bharat B. and Patil, Kashinath R. and Koinkar, Pankaj M. and More, Mahendra A. and Murakami, Ri-ichi} } @article { ISI:000303366000001, title = {Polymorphs, salts, and cocrystals: what{\textquoteright}s in a name?}, journal = {Crystal Growth \& Design}, volume = {12}, number = {5}, year = {2012}, month = {MAY}, pages = {2147-2152}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

The December 2011 release of a draft United States Food and Drug Administration (FDA) guidance concerning regulatory classification of pharmaceutical cocrystals of active pharmaceutical ingredients (APIs) addressed two matters of topical interest to the crystal engineering and pharmaceutical science communities: (1) a proposed definition of cocrystals; (2) a proposed classification of pharmaceutical cocrystals as dissociable {\textquoteleft}{\textquoteleft}API-excipient{\textquoteright}{\textquoteright} molecular complexes. The Indo U.S. Bilateral Meeting sponsored by the Indo-U.S. Science and Technology Forum titled The Evolving Role of Solid State Chemistry in Pharmaceutical Science was held in Manesar near Delhi, India, from February 2-4, 2012. A session of the meeting was devoted to discussion of the FDA guidance draft. The debate generated strong consensus on the need to define cocrystals more broadly and to classify them like salts. It was also concluded that the diversity of API crystal forms makes it difficult to classify solid forms into three categories that are mutually exclusive. This perspective summarizes the discussion in the Indo-U.S. Bilateral Meeting and includes contributions from researchers who were not participants in the meeting.

}, issn = {1528-7483}, doi = {10.1021/cg3002948}, author = {Aitipamula, Srinivasulu and Banerjee, Rahul and Bansal, Arvind K. and Biradha, Kumar and Cheney, Miranda L. and Choudhury, Angshuman Roy and Desiraju, Gautam R. and Dikundwar, Amol G. and Dubey, Ritesh and Duggirala, Nagakiran and Ghogale, Preetam P. and Ghosh, Soumyajit and Goswami, Pramod Kumar and Goud, N. Rajesh and Jetti, Ram R. K. R. and Karpinski, Piotr and Kaushik, Poonam and Kumar, Dinesh and Kumar, Vineet and Moulton, Brian and Mukherjee, Arijit and Mukherjee, Gargi and Myerson, Allan S. and Puri, Vibha and Ramanan, Arunachalam and Rajamannar, T. and Reddy, C. Malla and Rodriguez-Hornedo, Nair and Rogers, Robin D. and Row, T. N. Guru and Sanphui, Palash and Shan, Ning and Shete, Ganesh and Singh, Amit and Sun, Changquan C. and Swift, Jennifer A. and Thaimattam, Ram and Thakur, Tejender S. and Thaper, Rajesh Kumar and Thomas, Sajesh P. and Tothadi, Srinu and Vangala, Venu R. and Variankaval, Narayan and Vishweshwar, Peddy and Weyna, David R. and Zaworotko, Michael J.} } @article { ISI:000306942300059, title = {Polymorphs, salts and cocrystals: what{\textquoteright}s in a name? (vol 12, pg 2147, 2012)}, journal = {Crystal Growth \& Design}, volume = {12}, number = {8}, year = {2012}, month = {AUG}, pages = {4290-4291}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, issn = {1528-7483}, doi = {10.1021/cg300704b}, author = {Aitipamula, Srinivasulu and Banerjee, Rahul and Bansal, Arvind K. and Biradha, Kumar and Cheney, Miranda L. and Choudhury, Angshuman Roy and Desiraju, Gautam R. and Dikundwar, Amol G. and Dubey, Ritesh and Duggirala, Nagakiran and Ghogale, Preetam P. and Ghosh, Soumyajit and Goswami, Pramod Kumar and Goud, N. Rajesh and Jetti, Ram R. K. R. and Karpinski, Piotr and Kaushik, Poonam and Kumar, Dinesh and Kumar, Vineet and Moulton, Brian and Mukherjee, Arijit and Mukherjee, Gargi and Myerson, Allan S. and Puri, Vibha and Ramanan, Arunachalam and Rajamannar, T. and Reddy, C. Malla and Rodriguez-Hornedo, Nair and Rogers, Robin D. and Row, T. N. Guru and Sanphui, Palash and Shan, Ning and Shete, Ganesh and Singh, Amit and Sun, Changquan C. and Swift, Jennifer A. and Thaimattam, Ram and Thakur, Tejender S. and Thaper, Rajesh Kumar and Thomas, Sajesh P. and Tothadi, Srinu and Vangala, Venu R. and Vishweshwar, Peddy and Weyna, David R. and Zaworotko, Michael J.} } @article { ISI:000309634900001, title = {Practical and highly efficient protocol for multicomponent synthesis of beta-phosphonomalononitriles and 2-amino-4H-chromen-4-yl phosphonates using diethylamine as a novel organocatalyst}, journal = {Comptes Rendus Chimie}, volume = {15}, number = {9}, year = {2012}, month = {SEP}, pages = {745-752}, publisher = {ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER}, address = {23 RUE LINOIS, 75724 PARIS, FRANCE}, abstract = {

Diethylamine has been demonstrated for the first time to be a highly efficient organocatalyst in the solvent-free synthesis of beta-phosphonomalononitriles by a three component condensation of aldehyde, malononitrile and dialkyl phosphite at ambient temperature. The applicability of the same catalyst in the synthesis of diethyl (2-amino-3-cyano-chromene-4-yl) phosphonic acid esters has also been described. (c) 2012 Published by Elsevier Masson SAS on behalf of Academie des sciences.

}, keywords = {2-amino-4H-chromenes, beta-phosphonomalononitriles, diethylamine, multicomponent reactions, organocatalyst, Phospha-Michael reaction}, issn = {1631-0748}, doi = {10.1016/j.crci.2012.07.001}, author = {Kulkarni, M. A. and Pandurangi, V. R. and Desai, Uday V. and Wadgaonkar, P. P.} } @article {Poddar, title = {Purification and characterization of an antioxidant protein (similar to 16 kDa) from Terminalia chebula fruit}, journal = {Food Chemistry}, volume = {131}, number = {1}, year = {2012}, month = {MAR}, pages = {141-148}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Terminalia chebula fruit is used as folk medicine in India and Southeast Asia. An antioxidant protein was isolated by bioassay guided fractionation of T. chebula fruit by homogenizing in the citrate phosphate buffer. The isolated protein (TCP-III) obtained from fruit was purified by gel chromatography and preparative HPLC, showed apparent molecular weight of 16 kDa by SDS-PAGE and MALDI-TOF/MS analyses. Amino acid sequence obtained by LC-MSE analysis showed homology with the predicted protein fragments of Populus trichocarpa, putative uncharacterized protein fragments from Oryza sativa and with fragments of 17 kDa thylakoid lumenal protein from Spinacia oleracea. TCP-III exhibited significant radical scavenging in DPPH, NO, H2O2 and ABTS assays. In addition, TCP-III inhibited oxidation of linoleic acid in beta-carotene bleaching assay, reduced ferric ions and chelated ferrous ions. The present finding demonstrates uniquely, for the first time, characterization of an antioxidant protein from T. chebula fruit. (C) 2011 Elsevier Ltd. All rights reserved.

}, keywords = {16 kDa protein molecule of T. chebula, Antioxidant and free radical scavenging activity, Characterization, Purification, Terminalia chebula fruit}, issn = {0308-8146}, doi = {10.1016/j.foodchem.2011.08.048}, author = {Srivastava, Pratibha and Raut, Hema N. and Wagh, Renuka S. and Puntambekar, Hemalata M. and Kulkarni, Mahesh J.} } @article {UGC-New Delhi}, title = {Single crystal X-ray structure of lawsone anion: evidence for coordination of alkali metal ions and formation of naphthosemiquinone radical in basic media}, journal = {Journal of Molecular Structure}, volume = {1010}, number = {3-4}, year = {2012}, month = {FEB}, pages = {38-45}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

2-hydroxy-1,4-naphthoquinone; Lawsone (Lw) is a natural compound found in henna leaves. The reaction of lawsone with {\textquoteleft}Na{\textquoteright} metal (Lw-1), CH3COONa (Lw-2), NaOH (Lw-3), KOH (Lw-4), K2CO3 (Lw-5) and Tris(hydroxymethyl)aminomethane (Lw-6) were studied. Red orange solids obtained for Lw-1 to Lw-6 are characterized by Elemental Analysis, FTIR, (HNMR)-H-1 and EPR studies. The results reveal the coordination of alkali metals {\textquoteleft}Na{\textquoteright} and {\textquoteleft}K{\textquoteright} to lawsone anion. The single crystal X-ray structure of Lw-6 was solved and it crystallizes in triclinic space group P-1 with extensive hydrogen bonding network of C-H center dot center dot center dot O, N-H center dot center dot center dot O and O-H center dot center dot center dot O between cations and anions. Polycrystalline powder X-band EPR spectra of Lw-1 to Lw-5 shows signals similar to 2.004 at 133 K, while Lw-6 is EPR silent. The naphthosemiquinone (NSQ) radical formed in Lw-2 to Lw-5, is due to disproportion reaction of catechol and naphthoquinone. (C) 2011 Elsevier B.V. All rights reserved.

}, keywords = {2-Hydroxy-1, 4-naphthoquione, EPR, hydrogen bonding, Lawsone, Naphthosemiquinone radicals}, issn = {0022-2860}, doi = {10.1016/j.molstruc.2011.11.015}, author = {Salunke-Gawali, Sunita and Kathawate, Laxmi and Shinde, Yogesh and Puranik, Vedavati G. and Weyhermueller, Thomas} } @article { ISI:000302535600002, title = {Solvent-free one-pot synthesis of sulfonephthaleins from saccharin and phenols}, journal = {Synthetic Communications}, volume = {42}, number = {8}, year = {2012}, month = {OCT}, pages = {1101-1107}, publisher = {TAYLOR \& FRANCIS INC}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

Sulfonephthaleins can be synthesized in a single pot from saccharin and phenol via the in situ formation of 2-sulfobenzoic anhydride, followed by its reaction with phenol using H2SO4 as the condensing agent, in the absence of any solvent. This solvent-free synthesis is more economical and environmentally benign.

}, keywords = {H2SO4, Phenols, saccharin, sulfonephthalein}, issn = {0039-7911}, doi = {10.1080/00397911.2010.535946}, author = {Tillu, V. H. and Dumbre, Deepa K. and Borate, Hanumant B. and Wakharkar, R. D. and Choudhary, Vasant R.} } @article { ISI:000302902200025, title = {Synthesis, spectroscopy, and electrochemical investigation of new conjugated polymers containing thiophene and 1,3,4-thiadiazole in the main chain}, journal = {Journal of Applied Polymer Science}, volume = {125}, number = {3}, year = {2012}, month = {AUG}, pages = {1882-1889}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

Novel photoluminescent donoracceptor poly(p-phenylenevinylene)-type conjugated polymers containing thiophene and 1,3,4-thiadiazole units in the main chain were synthesized from 2,5-bis(5-bromomethyl-2-thienyl)-1,3,4-thiadiazole and 1,3/1,4-benzenedialdehyde by WittigHorner reaction. The synthesized polymers were characterized by the use of thermal analysis and spectroscopic (infrared, UV-visible absorption, and photoluminescence) measurement. The resultant material exhibited bluish green, green, and orange fluorescence in their solution and thin film and solid forms, respectively. The redox property of the polymers has also been studied by cyclic voltammetry. The optical and electrochemical studies reveal that these novel polymers are new promising materials for the development of efficient polymer light-emitting diodes. (c) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

}, keywords = {conjugated polymers, photoluminescence, thiophene and thiadiazole-containing polymer}, issn = {0021-8995}, doi = {10.1002/app.36238}, author = {Patil, Prashant S. and Haram, Nanda S. and Pal, Ravindra R. and Periasamy, N. and Wadgaonkar, Prakash P. and Salunkhe, Manikrao M.} } @article { ISI:000307308000020, title = {Transesterification of diethyl oxalate with phenol over sol-gel MoO3/TiO2 catalysts}, journal = {Chemsuschem}, volume = {5}, number = {8}, year = {2012}, month = {JUL}, pages = {1467-1473}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

The transesterification of diethyl oxalate (DEO) with phenol to form diphenyl oxalate (DPO) has been carried out in the liquid phase over very efficient MoO3/TiO2 solid-acid solgel catalysts. A selectivity of 100?\% with a remarkable maximum yield of 88?\% were obtained, which opens the route to downstream phosgene-free processes for the synthesis of polycarbonates. Interpretation of the results of various acidity measurements (NH3 and pyridine desorption, methanol oxidation as a probe reaction) allowed us to identify the catalytic sites as Lewis acid sites.

}, keywords = {heterogeneous catalysis, Lewis acids, Oxidation, sol-gel processes, transesterification}, issn = {1864-5631}, doi = {10.1002/cssc.201100802}, author = {Kotbagi, Trupti and Duy Luan Nguyen and Lancelot, Christine and Lamonier, Carole and Thavornprasert, Kaew-Arpha and Zhu Wenli and Capron, Mickael and Jalowiecki-Duhamel, Louise and Shubhangi B. Umbarkar and Dongare, Mohan K. and Dumeignil, Franck} } @article { ISI:000322512300025, title = {Cloning, overexpression, crystallization and preliminary X-ray crystallographic analysis of a slow-processing mutant of penicillin G acylase from Kluyvera citrophila}, journal = {Acta Crystallographica Section F-Structural Biology and Crystallization Communications}, volume = {69}, number = {8}, year = {2013}, month = {AUG}, pages = {925-929}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

{Kluyvera citrophila penicillin G acylase (KcPGA) has recently attracted increased attention relative to the well studied and commonly used Escherichia coli PGA (EcPGA) because KcPGA is more resilient to harsh conditions and is easier to immobilize for the industrial hydrolysis of natural penicillins to generate the 6-aminopenicillin (6-APA) nucleus, which is the starting material for semi-synthetic antibiotic production. Like other penicillin acylases, KcPGA is synthesized as a single-chain inactive pro-PGA, which upon autocatalytic processing becomes an active heterodimer of alpha and beta chains. Here, the cloning of the pac gene encoding KcPGA and the preparation of a slow-processing mutant precursor are reported. The purification, crystallization and preliminary X-ray analysis of crystals of this precursor protein are described. The protein crystallized in two different space groups, P1, with unit-cell parameters a = 54.0

}, issn = {1744-3091}, doi = {10.1107/S174430911301943X}, author = {Varshney, Nishant Kumar and Ramasamy, Sureshkumar and Brannigan, James A. and Wilkinson, Anthony J. and Suresh, C. G.} } @article { ISI:000312944900011, title = {Controlled synthesis of aligned Bi2S3 nanowires, sharp apex nanowires and nanobelts with its morphology dependent field emission investigations}, journal = {Crystengcomm}, volume = {15}, number = {5}, year = {2013}, month = {NOV}, pages = {890-896}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Well-aligned ultra-long Bi2S3 nanowire arrays with three kinds of apex morphology - abruptly sharpened apex, thin belt and flat - have been systematically fabricated on tungsten (W) foil by a facile hydrothermal method. The structural and morphological studies reveal formation of distinct tip morphologies, possessing high aspect ratio, single crystalline nature and growth along the orthorhombic [001] axis. A plausible growth mechanism has been proposed on the basis of observed experimental results. The field emission properties of Bi2S3 nanowires and sharp apex Bi2S3 nanowires are investigated. From the field emission studies, the values of the turn-on field, required to draw emission current density of similar to 0.1 mu A cm(-2), are observed to be similar to 2.01 and 1.21 V mu m(-1) for nanowires and sharp apex nanowires, respectively. Furthermore, ultra-long Bi2S3 nanowires are also grown on the W microtip (brush-like) from which very high emission current density similar to 11 mA cm(-2) has been drawn. These results are helpful for the design, fabrication and optimization of integrated field emitters using 1D nanostructures as cold cathode material.

}, issn = {1466-8033}, doi = {10.1039/c2ce26588e}, author = {Warule, Sambhaji S. and Chaudhari, Nilima S. and Kale, Bharat B. and Pandiraj, S. and Khare, Ruchita T. and More, Mahendra A.} } @article { ISI:000319610100005, title = {Cyanate ester resins containing pentadecyl-substituted cyclohexyl moiety: synthesis, curing and structure-property relationship}, journal = {High Performance Polymers}, volume = {25}, number = {3}, year = {2013}, month = {MAY}, pages = {278-286}, publisher = {SAGE PUBLICATIONS LTD}, address = {1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND}, abstract = {

Cyanate ester (CE) monomers containing pentadecyl-substituted cyclohexyl moieties such as 1,1-bis(4-cyanatophenyl) 3-pentadecylcyclohexane and 1,1-bis(4-cyanatophenyl) cyclohexane were synthesized and characterized by Fourier transform infrared, proton-nuclear magnetic resonance (H-1-NMR) and carbon-nuclear magnetic resonance (C-13-NMR) spectroscopies as well as differential scanning calorimetry (DSC). Both 1,1-bis(4-cyanatophenyl) 3-pentadecylcyclohexane and 1,1-bis(4-cyanatophenyl) cyclohexane exhibited better processability coupled with lower melting points, lower cure onset with broad cure exotherm than the commercially available CE monomer, namely, 2,2-bis(4-cyanatophenyl) propane. Glass transition temperatures of cured 2,2-bis(4-cyanatophenyl) propane, 1,1-bis(4-cyanatophenyl) cyclohexane and 1,1-bis(4-cyanatophenyl) 3-pentadecylcyclohexane were observed to be 288 degrees C, 302 degrees C and 160 degrees C, respectively. Cured 1,1-bis(4-cyanatophenyl) cyclohexane displayed higher storage modulus (1.59 x 10(9) Pa) than 1,1-bis(4-cyanatophenyl) 3-pentadecylcyclohexane (1.07 x 10(9) Pa) and 2,2-bis(4-cyanatophenyl) propane (1.39 x 10(9) Pa). The order of thermal stability of cured polycyanurates was found to be 2,2-bis(4-cyanatophenyl) propane \> 1,1-bis(4-cyanatophenyl) cyclohexane \> 1,1-bis(4-cyanato phenyl) 3-pentadecylcyclohexane. The moisture absorption of cured resins derived from 1,1-bis(4-cyanatophenyl) 3-pentadecyl cyclohexane and 1,1-bis(4-cynatophenyl) cyclohexane was found to be lower than that of 2,2-bis(4-cynatophenyl) propane implying the role of pentadecyl substituent and/or cyclohexyl moiety in imparting hydrophobicity to the polycyanurates.

}, keywords = {(pentadecyl substituted) cyclohexyl, curing, cyanate ester resin, thermosets}, issn = {0954-0083}, doi = {10.1177/0954008312463738}, author = {Kulkarni, Arun D. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.} } @article {43074, title = {Development and validation of a sensitive bioanalytical method for the determination of sumatriptan in rat plasma by UPLC-MS}, journal = {International Journal of Pharmacy and Pharmaceutical Sciences}, volume = {5}, year = {2013}, month = {AUG}, pages = {78-82}, author = {Kumbhar, Amruta B. and Galgatte, Upendra C. and Warkad, Shrikant D. and Santhakumari, B.} } @article { ISI:000322943000001, title = {Diethylamine: a smart organocatalyst in eco-safe and diastereoselective synthesis of medicinally privileged 2-amino-4H-chromenes at ambient temperature}, journal = {Comptes Rendus Chimie}, volume = {16}, number = {8}, year = {2013}, month = {AUG}, pages = {689-695}, publisher = {ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER}, address = {23 RUE LINOIS, 75724 PARIS, FRANCE}, abstract = {

Diethylamine has been demonstrated to be an efficient organocatalyst in the diastereoselective synthesis of Bcl-2 protein antagonist (HA-14-1) and of its structural analogues by one-pot condensation between salicylaldehyde and three different C-H acids, viz, ethyl cyanoacetate, phenylsulfonyl acetonitrile, and malononitrile. Easy commercial availability of the catalyst at extremely low cost and avoidance of conventional work-up as well as purification procedures qualifies this scalable protocol for a {\textquoteleft}{\textquoteleft}near-ideal synthesis{\textquoteright}{\textquoteright}. (c) 2013 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

}, keywords = {2-amino-4H-chromenes, Active methylene compounds (C-H acids), diethylamine, multicomponent reactions, organocatalyst}, issn = {1631-0748}, doi = {10.1016/j.crci.2013.02.016}, author = {Kulkarni, Makarand A. and Pandit, Kapil S. and Desai, Uday V. and Lad, Uday P. and Wadgaonkar, Prakash P.} } @article { ISI:000315306200009, title = {Effect of clay and of electrospinning on the polymorphism, structure and morphology of poly(vinylidene fluoride)}, journal = {European Polymer Journal}, volume = {49}, number = {1}, year = {2013}, month = {JAN}, pages = {90-99}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Electrospun poly(vinylidene fluoride) (PVDF) fibers, containing different amounts of montmorillonite clay were produced, in order to study the effect of clay and of the electrospinning process on the polymorphism, structure and morphology of the PVDF matrix, Clay acted as a processing aid agent, avoiding the formation of beads and improving the quality of the fibers. Clay and the electrospinning process acted synergically on the chain mobility, favoring the formation of beta phase of PVDF, the most valuable for its piezoelectric properties, and shaping its semicrystalline morphology. Electrospinning did not significantly aid the dispersion of clay within the matrix. The interplay of formulation and processing in these composites allowed to obtain PVDF-based materials with varying polymorphism, structure and morphology, offering the possibility to ultimately control their functional properties. (C) 2012 Elsevier Ltd. All rights reserved.

}, keywords = {Composite, electrospinning, Poly(vinylidene fluoride), Polymer, polymorphism, SAXS}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2012.09.023}, author = {Neppalli, Ramesh and Wanjale, Santosh and Birajdar, Mallinath S. and Causin, Valerio} } @article { ISI:000323644600048, title = {Enhanced dual-effect of adsorption and photodegradation of SiO2 embedded TiO2 hybrid catalyst for improved decolourization of methylene blue}, journal = {Water Air and Soil Pollution}, volume = {224}, number = {9}, year = {2013}, month = {SEP}, pages = {1726}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

Dual-effects of adsorption and photodegradation over titania, silica embedded titania, silica and commercial Degussa P-25 samples were studied for the decolourization of methylene blue in aqueous medium. Silica embedded titania and silica were prepared using inexpensive polymeric version of ethyl silicate as a source of silica. Catalysts were characterized by X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy and low temperature (77 K) nitrogen adsorption measurements. Among all the catalysts, silica embedded titania has exhibited faster decolourization of methylene blue solution on account of the enhancement of adsorption followed by degradation. An amount of the catalyst and the initial dye concentration of MB solution were found to influence the decolourization activity. Compared to titania catalyst, silica embedded titania and Degussa P-25 have shown the red shift in their UV-Vis spectrum. The experimental data of the reaction fitted well to the pseudo first order kinetic model. In present studies, the adsorption mechanism for the decolourization of MB solution was found to be applicable for an intra particle diffusion model.

}, keywords = {Adsorption, kinetic model, Methylene blue, Photodegradation, Silica embedded titania}, issn = {0049-6979}, doi = {10.1007/s11270-013-1726-7}, author = {Sonar, Shilpa K. and Wagh, Reshma V. and Niphadkar, Prashant S. and Joshi, Praphulla N. and Deshpande, Shilpa S. and Awate, Shobhana V.} } @article { ISI:000327459400021, title = {Environmentally benign enhanced H-2 production from abundant copious waste H2S using size tuneable cubic bismuth (Bi-0) quantum dots-GeO2 glass photocatalyst under solar light}, journal = {Green Chemistry}, volume = {15}, number = {12}, year = {2013}, month = {OCT}, pages = {3459-3467}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Hydrogen sulfide is a copious gas produced in refineries (15-20\%) as well as billions of tons produced as a by-product in alkali industries. Selectively, only 5\% has been utilised for the Claus process to produce liquid sulfur and it is also well known for its uneconomical and environmental problems. Here, we have demonstrated a significant green approach for conversion of poisonous H2S into H-2 by stable cubic bismuth (Bi-0) quantum dot-glass nanosystems using solar light as the energy source. Previously, metal oxides and sulfides have been demonstrated as solar light photocatalysts. However, a unique bismuth quantum dot-glass nanosystem has been designed where cubic phase bismuth quantum dots of size 1-2 nm are grown in the germanate glass matrix successfully. The presence of bismuth (Bi-0) was confirmed by XRD, Raman, TEM and X-ray photoelectron spectroscopy (XPS). The glass nanosystem shows quantum confinement with variation of the band gap from 2.95-1.51 eV. Considering the broad absorption from visible to near IR, we used this glass nanosystem as a solar light active photocatalyst and hydrogen production with respect to the quantum confinement of bismuth (Bi-0) quantum dots has been demonstrated for the first time. The photocatalytic activity for hydrogen production using glass nano-systems having bismuth quantum dot sizes of 1-2 nm and 3-6 nm was measured under solar light and prima fascia observations revealed that the glass nanosystems with very small quantum dots (1-2 nm) showed enhanced hydrogen evolution (11 541 mu mol h(-1) g(-1)) from H2S. The hydrogen evolution obtained is much higher than for previously reported visible light active nanostructured sulfide/oxide or embedded glass nanosystems. The glass nanosystems were also used for water splitting and show evolution of hydrogen without any co-catalyst. It is noteworthy that the quantum dot-glass photocatalyst is highly stable and catalyst regeneration is quite easy and fast. Hence, the QD-bismuth-glass nanocomposites have significant advantages over normal nanosized powder catalysts. Such unique glass nanosystems will also have great potential in photonics and optoelectronic applications.

}, issn = {1463-9262}, doi = {10.1039/c3gc41940a}, author = {Apte, Sanjay K. and Garaje, Sunil N. and Naik, Sonali D. and Waichal, Rupali P. and Kale, Bharat B.} } @article { ISI:000316812800023, title = {Facile strategy for synthesis of ,-heterobifunctionalized poly (epsilon-caprolactones) and poly (methyl methacrylate)s containing {\textquoteleft}{\textquoteleft}clickable{\textquoteright}{\textquoteright} aldehyde and allyloxy functional groups using initiator approach}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {51}, number = {9}, year = {2013}, month = {MAY}, pages = {2091-2103}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Two new initiators, namely, 4-(4-(2-(4-(allyloxy) phenyl)-5-hydroxypentane 2-yl) phenoxy)benzaldehyde and 4-(4-(allyloxy) phenyl)-4-(4-(4-formylphenoxy) phenyl) pentyl 2-bromo-2-methyl propanoate containing clickable hetero-functionalities namely aldehyde and allyloxy were synthesized starting from commercially available 4,4-bis(4-hydroxyphenyl) pentanoic acid. These initiators were utilized, respectively, for ring opening polymerization of epsilon-caprolactone and atom transfer radical polymerization of methyl methacrylate. Well-defined -aldehyde, -allyloxy heterobifunctionalized poly(epsilon-caprolactones) (Mn,GPC: 590029,000, PDI: 1.261.43) and poly(methyl methacrylate)s (Mn,GPC: 530028800, PDI: 1.191.25) were synthesized. The kinetic study of methyl methacrylate polymerization demonstrated controlled polymerization behavior. The presence of aldehyde and allyloxy functionality on polymers was confirmed by 1H NMR spectroscopy. Aldehyde-aminooxy and thiol-ene metal-free double click strategy was used to demonstrate reactivity of functional groups on polymers. (c) 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013, 51, 2091-2103

}, keywords = {atom transfer radical polymerization, Click chemistry, functional polymers, ring opening polymerization}, issn = {0887-624X}, doi = {10.1002/pola.26598}, author = {Sane, Prakash S. and Tawade, Bhausaheb V. and Parmar, Indravadan and Kumari, Savita and Nagane, Samadhan and Wadgaonkar, Prakash P.} } @article { ISI:000327071100001, title = {Hollow nanogold/meso-magnetite composite: pulsed laser synthesis, properties, and biosensing application}, journal = {Journal of Nanoparticle Research}, volume = {15}, number = {12}, year = {2013}, month = {NOV}, pages = {Article No. UNSP 2081}, publisher = {SPRINGER}, type = {Article}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

A facile and template-free UV (Excimer) laser photolysis process is demonstrated to transform a Fe-complex into unique hollow Fe3O4 nanosphere morphology with each sphere having nanometric pores and an opening. Depending on the Fe-complex concentration and processing time interesting configurations are seen to evolve. When an identical process is applied to a mixture of Fe-complex and chloroauric acid an enthrallingly decorated Au-Fe3O4 nanostructure evolves, with Au nanoparticles surface-loaded on mesospheric Fe3O4. This room temperature process implemented under normal laboratory conditions is clearly versatile and applicable to heterojunction nanomaterials synthesis in a single-step process. The potential application of these gold-decorated magnetic nanostructures was also investigated for immuno-magnetic capture of E. coli in biosensing and these were found to be sensitive even below 1,000 cfu/ml. The test results demonstrate linear sensing response in the range of 10(3)-10(5) cfu/ml. We also show that these nanostructures can be used for simple electrical conductivity-based biosensing since they show dramatic conductivity change in a simple drop-cast test. A new laser-based approach to the synthesis of unique hollow sphere morphology of magnetite (Fe3O4) without and with Au nanoparticle decoration is presented. The potential application of these gold-decorated magnetic nanostructures was also investigated for immuno-magnetic capture of E. coli in biosensing and these were found to be sensitive even below 1,000 cfu/ml.

}, keywords = {E. coli cells, Fe-complex, Meso-magnetite, Nanobiotechnology, Nanocomposite, Pulse laser irradiation}, issn = {1388-0764}, doi = {10.1007/s11051-013-2081-8}, author = {Chaudhari, Nilima and Warule, Sambhaji and Agrawal, Shailaja and Thakare, Vishal and Jouen, Samuel and Hannoyer, Beatrice and Kale, Bharat and Paknikar, Kishore and Ogale, Satishchandra B.} } @article { ISI:000317255200008, title = {Mechanistic approach for expeditious and solvent-free synthesis of alpha-hydroxy phosphonates using potassium phosphate as catalyst}, journal = {Comptes Rendus Chimie}, volume = {16}, number = {2}, year = {2013}, month = {FEB}, pages = {148-152}, publisher = {ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER}, address = {23 RUE LINOIS, 75724 PARIS, FRANCE}, abstract = {

An extremely simple, high yielding, highly rapid and solvent-free protocol has been described for hydrophosphylation of aldehydes using potassium phosphate as catalyst. Easy commercial availability of the reusable catalyst, operational simplicity at ambient temperature and avoidance of conventional work-up as well as purification procedure makes this solvent-free protocol a near-ideal synthesis. (C) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

}, keywords = {alpha-hydroxy phosphonates, Hydrophosphylation, Potassium phosphate, Solvent-free}, issn = {1631-0748}, doi = {10.1016/j.crci.2012.10.009}, author = {Kulkarni, Makarand A. and Lad, Uday P. and Desai, Uday V. and Mitragotri, Satish D. and Wadgaonkar, Prakash P.} } @article { ISI:000329153300077, title = {Morphology, polymorphism, and metal ion adsorption studies of electrospun nanofibers based on pvdf and organically modified layered double hydroxide}, journal = {Journal of Applied Polymer Science}, volume = {130}, number = {6}, year = {2013}, month = {DEC}, pages = {4508-4515}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Nonwoven nanofiber mats of polyvinylidene fluoride (PVDF) with modified layered double hydroxide (MLDH) were prepared by electrospinning. The fiber morphology was studied using scanning electron microscopy. X-ray diffraction and FTIR spectroscopy was used to characterize the polymorphism in electrospun mats. Fibers of diameter in the range 80-800 nm with beads of about 2-3 mu m size were observed for pure PVDF, while in case of PVDF/MLDH nanocomposites the number and size of beads were found to be significantly reduced. Uniform and fine nanofibers were obtained at lower content of MLDH, but slightly rough surface was seen for higher content. FTIR and X-ray diffraction patterns signify various crystalline forms of electrospun PVDF. The content of polar -crystalline phase of PVDF, which exhibit piezo and ferroelectric properties was found to be enhanced significantly due to reinforcement of MLDH. Use of these nanofiber mats for heavy metal Cu (II) removal was explored. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4508-4515, 2013

}, keywords = {Adsorption, electrospinning, fibers}, issn = {0021-8995}, doi = {10.1002/app.39729}, author = {Birajdar, Mallinath S. and Wanjale, Santosh D. and Lonkar, Sunil P.} } @article { ISI:000325924000001, title = {New organosoluble aromatic poly(esterimide)s containing pendent pentadecyl chains: synthesis and characterization}, journal = {High Performance Polymers}, volume = {25}, number = {7}, year = {2013}, month = {NOV}, pages = {735-743}, publisher = {SAGE PUBLICATIONS LTD}, address = {1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND}, abstract = {

A new diimide dicarboxylic acid, namely 2,2-(4-pentadecyl-1,3-phenylene)bis(1,3-dioxoisoindoline-5-carboxylic acid), containing preformed imide rings and pentadecyl chain, was synthesized by the reaction of 4-pentadecylbenzene-1,3-diamine with trimellitic anhydride. A series of new aromatic poly(esterimide)s (PEIs) was synthesized using diphenylchlorophosphate-activated direct polycondensation of 2,2-(4-pentadecyl-1,3-phenylene)bis(1,3-dioxoisoindoline-5-carboxylic acid), with five commercially available bisphenols, namely 4,4-isopropylidenediphenol (I), 4,4-(hexafluoroisopropylidene)diphenol (II), 4,4-oxydiphenol (III), 4,4-biphenol (IV), and 4,4-(9-fluorenylidene)diphenol (V) in the presence of pyridine and lithium chloride. Inherent viscosities of PEIs were in the range 0.54-0.83dLg(-1) in chloroform (CHCl3) at 30 +/- 0.1 degrees C. PEIs containing pendent pentadecyl chains were soluble in organic solvents such as CHCl3, m-cresol, N, N-dimethylacetamide, 1-methyl-2-pyrrolidinone, pyridine, and nitrobenzene. Tough, transparent, and flexible films of PEIs could be cast from their CHCl3 solutions. PEIs exhibited glass transition temperature in the range 145-198 degrees C. The temperature at 10\% weight loss of PEIs, determined by thermogravimetric analysis under the nitrogen atmosphere, was in the range of 450-470 degrees C indicating good thermal stability.

}, keywords = {pendent pentadecyl chains, Polycondensation, Polyimide, Preformed imide rings, Thermogravimetric analysis}, issn = {0954-0083}, doi = {10.1177/0954008313483344}, author = {Sadavarte, Nilakshi V. and Patil, Sachin S. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article { ISI:000315540200007, title = {One-step method for the synthesis of aryl olefins from aryl aldehydes and aliphatic aldehydes}, journal = {Tetrahedron Letters}, volume = {54}, number = {12}, year = {2013}, month = {MAR}, pages = {1528-1530}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

A conceptually new one-step reaction affording unexpected aryl olefinic product from aromatic aldehyde, aliphatic aldehyde and malononitrile in the presence of acetic acid-ammonium acetate under mild reaction conditions without using any metal catalyst is reported. This novel reaction was used to prepare a number of substituted aryl olefins including new molecules. (c) 2013 Elsevier Ltd. All rights reserved.

}, keywords = {Aliphatic aldehyde, Aromatic aldehyde, Aryl olefin, Dicyanoaniline, Malononitrile}, issn = {0040-4039}, doi = {10.1016/j.tetlet.2013.01.008}, author = {Borate, Hanumant B. and Gaikwad, Supriya H. and Kudale, Ananada S. and Chavan, Subhash P. and Pharande, Shrikant G. and Wagh, Vitthal D. and Sawant, Vikram S.} } @article { ISI:000321434500006, title = {Palladium chloride catalyzed photochemical heck reaction}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {91}, number = {5}, year = {2013}, month = {MAY}, pages = {348-351}, publisher = {CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS}, address = {65 AURIGA DR, SUITE 203, OTTAWA, ON K2E 7W6, CANADA}, abstract = {

PdCl2 catalyzed carbon-carbon bond formation (Heck reaction) between substituted aryl halides and olefins was carried out without a ligand, under irradiation with UV-visible light. The results demonstrated that UV-visible light accelerated the rate of the reaction, leading to an excellent yield of corresponding products. The recovered palladium nanoparticles could be thermally recycled several times. PdCl2 gave excellent conversion up to the fifth addition of substrate.

}, keywords = {C-C coupling, Heck reaction, iodobenzene, photochemical reaction}, issn = {0008-4042}, doi = {10.1139/cjc-2012-0377}, author = {Waghmode, Suresh B. and Arbuj, Sudhir S. and Wani, Bina N. and Gopinath, Chinnakonda S.} } @article { ISI:000326259800016, title = {Quantifying the mechanism of phosphate monoester hydrolysis in aqueous solution by evaluating the relevant Ab initio QM/MM free-energy surfaces}, journal = {Journal of Physical Chemistry B}, volume = {117}, number = {42}, year = {2013}, month = {OCT}, pages = {12807-12819}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Understanding the nature of the free-energy surfaces for phosphate hydrolysis is a prerequisite for understanding the corresponding key chemical reactions in biology. Here, the challenge has been to move to careful ab initio QM/MM (QM(ai)/MM) free-energy calculations, where obtaining converging results is very demanding and computationally expensive. This work describes such calculations, focusing on the free-energy surface for the hydrolysis of phosphate monoesters, paying special attention to the comparison between the one water (1W) and two water (2W) paths for the proton-transfer (PT) step. This issue has been explored before by energy minimization with implicit solvent models and by nonsystematic QM/MM energy minimization, as well as by nonsystematic free-energy mapping. However, no study has provided the needed reliable 2D (3D) surfaces that are necessary for reaching concrete conclusions. Here we report a systematic evaluation of the 2D (3D) free-energy maps for several relevant systems, comparing the results of QM(ai)/MM and QM(ai)/implicit solvent surfaces, and provide an advanced description of the relevant energetics. It is found that the 1W path for the hydrolysis of the methyl diphosphate (MDP) trianion is 6-9 kcal/mol higher than that the 2W path. This difference becomes slightly larger in the presence of the Mg2+ ion because this ion reduces the plc of the conjugated acid form of the phosphate oxygen that accepts the proton. Interestingly, the BLYP approach (which has been used extensively in some studies) gives a much smaller difference between the 1W and 2W activation barriers. At any rate, it is worth pointing out that the 2W transition state for the PT is not much higher that the common plateau that serves as the starting point of both the 1W and 2W PT paths. Thus, the calculated catalytic effects of proteins based on the 2W PT mechanistic model are not expected to be different from the catalytic effects predicted using the 1W PT mechanistic model, which was calibrated on the observed barrier in solution and in which the TS charge distribution was similar to the that of the plateau (as was done in all of our previous EVB studies).

}, issn = {1520-6106}, doi = {10.1021/jp4020146}, author = {Plotnikoy, Nikolay V. and Prasad, B. Ram and Chakrabarty, Suman and Chu, Zhen T. and Warshel, Arieh} } @article {43232, title = {Sensing behavior of atomically thin-layered MoS2 transistors}, journal = {ACS Nano}, volume = {7}, year = {2013}, month = {JUN}, pages = {4879-4891}, abstract = {Most of recent research on layered chalcogenides is understandably focused on single atomic layers. However, it is unclear if single-layer units are the most ideal structures for enhanced gas solid interactions. To probe this issue further, we have prepared large-area MoS2 sheets ranging from single to multiple layers on 300 nm SiO2/Si substrates using the micromechanical exfoliation method. The thickness and layering of the sheets were identified by optical microscope, invoking recently reported specific optical color contrast, and further confirmed by AFM and Raman spectroscopy. The MoS2 transistors with different thicknesses were assessed for gas-sensing performances with exposure to NO2, NH3, and humidity in different conditions such as gate bias and light Irradiation. The results show that, compared to the single-layer counterpart, transistors of few MoS2 layers exhibit excellent sensitivity, recovery, and ability to be manipulated by gate bias and green light. Further, our ab initio DFT calculations on single-layer and bilayer MoS2 show that the charge transfer is the reason for the decrease in resistance in the presence of applied field.}, doi = {10.1021/nn400026u}, author = {Late, Dattatray J. and Huang, Yi-Kai and Liu, Bin and Acharya, Jagaran and Shirodkar, Sharmila N. and Luo, Jiajun and Yan, Aiming and Charles, Daniel and Waghmare, Umesh V. and Dravid, Vinayak P. and Rao, C. N. R.} } @article { ISI:000318142300022, title = {Solution and in silico studies on the recombinant lectin from Cicer arietinum seeds}, journal = {International Journal of Biological Macromolecules}, volume = {56}, year = {2013}, month = {MAY}, pages = {149-155}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The Cicer arietinum seed lectin was cloned and expressed in Escherichia coli and purified in active form. Conformational characterization of the recombinant lectin (rCAL) was performed using biophysical and bioinformatics tools. Thermal denaturation of rCAL caused rapid secondary structural rearrangements above 50 degrees C and transient exposure of hydrophobic residues at 55 degrees C, leading to aggregation. Treatment of rCAL with GdnHCl resulted in unfolding followed by dissociation of the dimer. The single tryptophan in rCAL present on the surface of the protein is surrounded by hydrophobic and acidic amino acids and exists as different conformers. The experimental observations correlated well with the structural information revealed from the homology model of rCAL. (C) 2013 Elsevier B.V. All rights reserved.

}, keywords = {Aggregation, BL21-CodonPlus (DE3)-RIL cells, Cicer lectin, Homology model, Steady-state and time resolved fluorescence, Unfolding}, issn = {0141-8130}, doi = {10.1016/j.ijbiomac.2013.02.015}, author = {Wakankar, Madhurima S. and Krishnasastry, Musti V. and Jaokar, Tulika M. and Patel, Krunal A. and Gaikwad, Sushama M.} } @article { ISI:000327521300003, title = {Superior field emission properties of layered WS2-RGO nanocomposites}, journal = {Scientific Reports}, volume = {3}, year = {2013}, month = {NOV}, pages = {3282}, publisher = {NATURE PUBLISHING GROUP}, address = {MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND}, abstract = {

We report here the field emission studies of a layered WS2-RGO composite at the base pressure of similar to 1 x 10(-8) mbar. The turn on field required to draw a field emission current density of 1 mu A/cm(2) is found to be 3.5, 2.3 and 2 V/mu m for WS2, RGO and the WS2-RGO composite respectively. The enhanced field emission behavior observed for the WS2-RGO nanocomposite is attributed to a high field enhancement factor of 2978, which is associated with the surface protrusions of the single-to-few layer thick sheets of the nanocomposite. The highest current density of similar to 800 mu A/cm(2) is drawn at an applied field of 4.1 V/mu m from a few layers of the WS2-RGO nanocomposite. Furthermore, first-principles density functional calculations suggest that the enhanced field emission may also be due to an overalp of the electronic structures of WS2 and RGO, where graphene-like states are dumped in the region of the WS2 fundamental gap.

}, issn = {2045-2322}, doi = {10.1038/srep03282}, author = {Rout, Chandra Sekhar and Joshi, Padmashree D. and Kashid, Ranjit V. and Joag, Dilip S. and More, Mahendra A. and Simbeck, Adam J. and Washington, Morris and Nayak, Saroj K. and Late, Dattatray J.} } @article { ISI:000328941200014, title = {Supramolecular nanoparticles that target phosphoinositide-3-kinase overcome insulin resistance and exert pronounced antitumor efficacy}, journal = {Cancer Research}, volume = {73}, number = {23}, year = {2013}, month = {DEC}, pages = {6987-6997}, publisher = {AMER ASSOC CANCER RESEARCH}, address = {615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA}, abstract = {

The centrality of phosphoinositide-3-kinase (PI3K) in cancer etiology is well established, but clinical translation of PI3K inhibitors has been limited by feedback signaling, suboptimal intratumoral concentration, and an insulin resistance {\textquoteleft}{\textquoteleft}class effect.{\textquoteright}{\textquoteright} This study was designed to explore the use of supramolecular nanochemistry for targeting PI3K to enhance antitumor efficacy and potentially overcome these limitations. PI3K inhibitor structures were rationally modified using a cholesterol-based derivative, facilitating supramolecular nanoassembly with L-alpha-phosphatidylcholine and DSPE-PEG [1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polythylen e glycol)]. The supramolecular nanoparticles (SNP) that were assembled were physicochemically characterized and functionally evaluated in vitro. Antitumor efficacy was quantified in vivo using 4T1 breast cancer and K-Ras(LSL/+)/Pten(fl/fl) ovarian cancer models, with effects on glucose homeostasis evaluated using an insulin sensitivity test. The use of PI103 and PI828 as surrogate molecules to engineer the SNPs highlighted the need to keep design principles in perspective; specifically, potency of the active molecule and the linker chemistry were critical principles for efficacy, similar to antibody-drug conjugates. We found that the SNPs exerted a temporally sustained inhibition of phosphorylation of Akt, mTOR, S6K, and 4EBP in vivo. These effects were associated with increased antitumor efficacy and survival as compared with PI103 and PI828. Efficacy was further increased by decorating the nanoparticle surface with tumor-homing peptides. Notably, the use of SNPs abrogated the insulin resistance that has been associated widely with other PI3K inhibitors. This study provides a preclinical foundation for the use of supramolecular nanochemistry to overcome current challenges associated with PI3K inhibitors, offering a paradigm for extension to other molecularly targeted therapeutics being explored for cancer treatment. (C)2013 AACR.

}, issn = {0008-5472}, doi = {10.1158/0008-5472.CAN-12-4477}, author = {Kulkarni, Ashish A. and Roy, Bhaskar and Rao, Poornima S. and Wyant, Gregory A. and Mahmoud, Ayaat and Ramachandran, Madhumitha and Sengupta, Poulomi and Goldman, Aaron and Kotamraju, Venkata Ramana and Basu, Sudipta and Mashelkar, Raghunath Anant and Ruoslahti, Erkki and Dinulescu, Daniela M. and Sengupta, Shiladitya} } @article { ISI:000320979500046, title = {Syntheses and determination of absolute configurations and biological activities of the enantiomers of the longtailed mealybug pheromone}, journal = {Journal of Organic Chemistry}, volume = {78}, number = {12}, year = {2013}, month = {JUN}, pages = {6281-6284}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Preparation and assignment of absolute configurations to both enantiomers of the sex pheromone of the longtailed mealybug, an irregular monoterpenoid with extraordinary biological activity, has been completed. Comparison of the biological activities of both enantiomers and the racemate in field trials showed that the (S)-(+)-enantiomer was highly attractive to male mealybugs, strongly suggesting that female longtailed mealybugs produce this enantiomer. The (R)-(-)-enantiomer was benign, being neither attractive nor inhibitory.

}, issn = {0022-3263}, doi = {10.1021/jo400491n}, author = {Ramesh, Remya and Swaroop, Pandrangi Siva and Gonnade, Rajesh G. and Thirupath, Choppari and Waterworth, Rebeccah A. and Millar, Jocelyn G. and Reddy, D. Srinivasa} } @article { ISI:000319610100003, title = {Synthesis and characterization of poly(ether ether ketone)s and poly(ether ether ketone ketone) s containing pendant biphenyl and naphthyl groups}, journal = {High Performance Polymers}, volume = {25}, number = {3}, year = {2013}, month = {MAY}, pages = {260-267}, publisher = {SAGE PUBLICATIONS LTD}, address = {1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND}, abstract = {

New poly(ether ether ketone)s (PEEKs) and poly(ether ether ketone ketone)s (PEEKKs) containing pendant biphenyl and naphthyl groups were synthesized by nucleophilic substitution reaction of each of the four bisphenols viz., 1-(4- biphenylyl)- 1,1- bis(4- hydroxyphenyl) ethane, 1-(4- biphenylyl)- 1,1- bis(3- methyl, 4- hydroxyphenyl) ethane, 4,4{\textquoteright}-[1-(2- naphthalenyl) ethylidene] bis-phenol and 4,4{\textquoteright}-[1-(2- naphthalenyl) ethylidene] bis-3-methylphenol with 4,4{\textquoteright}- difluorobenzophenone and 1,3- bis(4- fluorobenzoyl) benzene in a solvent mixture of N,N-dimethylacetamide and toluene in the presence of anhydrous potassium carbonate. Inherent viscosities and number-average molecular weights of polymers were in the range of 0.42-0.86 dl/g and 2.40-7.55 x 10(4), respectively. PEEKs and PEEKKs were amorphous in nature and were readily soluble in a wide range of organic solvents and could be cast into flexible and tough films from chloroform solution. Glass transition temperature of PEEKs and PEEKKs were in the range of 180 degrees C -200 degrees C. T-10 values of PEEKs and PEEKKs were in the range of 424 degrees C-512 degrees C in nitrogen atmosphere, indicating their good thermal stability.

}, keywords = {biphenyl, bisphenol, naphthyl, poly(ether ether ketone ketone)s, poly(ether ether ketone)s, Polycondensation, Thermal properties}, issn = {0954-0083}, doi = {10.1177/0954008312462731}, author = {Honkhambe, Pandurang N. and Dhamdhere, Neelam A. and Tawade, Bhausaheb V. and Salunkhe, Manikrao M. and Wadgaonkar, Prakash P.} } @article { ISI:000318748300011, title = {Thermodynamic behavior of hydrophobically modified polyacrylamide containing random distribution of hydrophobes: experimental and theoretical investigations}, journal = {Polymer}, volume = {54}, number = {11}, year = {2013}, month = {MAY}, pages = {2676-2689}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Two series of Hydrophobically Modified Polyacrylamides (HMPAMs) were prepared by free radical copolymerization of trimethylsilylacrylamide with 3-pentadecylcyclohexylacrylamide (PDCAM) or dodecylacrylamide (DDAM) followed by removal of trimethylsilyl protecting groups. The solution properties of HMPAMs were studied in dilute aqueous solution by fluorescence spectroscopy, NMR and viscometry. The properties in aqueous solution of HMPAMs clearly displayed the formation of hydrophobic interactions between alkyl stickers. While dodecyl containing HMPAMs mainly showed a progressive collapse of the copolymer coil with the increasing fraction of hydrophobic moieties (weak intra-chain associations), pentadecylcyclohexyl groups containing HMPAMs exhibited a much lower solubility in water due to strong intra- and inter-chain associations. Experimental data were analyzed using the mean field theory developed by Semenov and Rubinstein (SR) for associating polymers. Using a set of realistic parameters, taking into account the solubility of the backbone, the fraction of stickers and the strength of hydrophobic attractions, we show that the SR model offers a quantitative description of the thermodynamic properties of HMPAMs in terms of individual and collective behavior of polymers chains; i.e. swelling and phase separation, respectively. (C) 2013 Elsevier Ltd. All rights reserved.

}, keywords = {Associating polymer, Polyacrylamide, Self-assembling}, issn = {0032-3861}, doi = {10.1016/j.polymer.2013.03.039}, author = {Hourdet, Dominique and Ducouret, Guylaine and Varghese, Sony and Badiger, Manohar V. and Wadgaonkar, Prakash P.} } @article { ISI:000335434600004, title = {Thermoresponsive and biodegradable dextran based microgels: synthesis and structural investigation}, journal = {Macromolecular Symposia}, volume = {329}, number = {1}, year = {2013}, note = {Polymer Networks Conference (PNG), WY, AUG 12-16, 2012}, month = {JUL}, pages = {27-34}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

Nanostructured objects, often ranging from hundreds of nanometers to few microns, support a number of functions directly linked to their structural features. They are, or they will be, protagonists in biomedical applications where miniaturized activities are required. These include the interface with living systems as tissues and cells, where targeted release of drug molecules occurs, or molecular imaging methods monitoring the drug trafficking in specific cell districts. The potentials of such devices, far to be fully understood, will be assessed only when a close correlation of their functions with their structure will be established. In this contribution we present a dextran based microdevice responsive to temperature and biodegradable. Both thermoresponsivity and biodegradability are of relevance for the potential use as drug carrier and controlled release device. The temperature behaviour, overall structure and internal architectures have been addressed with different methods.

}, keywords = {Biomaterials, colloids, dynamic light scattering, hydrogels, p(NiPAAm)}, issn = {1022-1360}, doi = {10.1002/masy.201300009}, author = {Ghugare, Shivkumar V. and Chiessi, Ester and Sakai, Victoria Garcia and Telling, Mark T. F. and Wadgaonkar, Prakash P. and Paradossi, Gaio} } @article {43379, title = {Aptamer functionalized multifunctional fluorescent nanotheranostic platform for pancreatic cancer}, journal = {Journal of Nanopharm Drug Delivery}, year = {2014}, month = {DEC}, abstract = {This study explores the potential of aptamer functionalized and fluorescent silver nanoparticles (AgNPs) labeled human serum albumin nanoparticles for drug delivery and bioimaging. Nanotechnology is certainly the most promising research arena in recent years and different fields of biotechnology, medicine and agricultural have been deeply benefited by the enormous advantages of nanotechnology. In recent years, synthesis of nanoparticles via eco-friendly methods has attained a lot of interest and silver nanoparticles are synthesized extensively due to their size tunable properties and vast applicability in different areas. In this study we have explored green synthesized fluorescent silver nanoparticles as a novel bioimaging agent for pancreatic cancer. Capsaicin, a plant phytochemical found in red chilli pepper was encapsulated in aptamer MUC-1 coupled albumin nanoparticles and it was observed that the nanoformulation significantly enhanced the bioavailability and sustained release property of the drug to pancreatic cancer cells in-vitro. Meanwhile AgNPs mediated excellent bioimaging has enhanced the efficacy of our system as drug delivery vehicle.}, doi = {10.1166/jnd.2014.1070}, author = {Nigam, Preeti and Waghmode, Shobha A. and Yeware, Amar M. and Nawale, Laxman U. and Dagde, Priyanka and Dudhane, Amol and Sarkar, Dhiman} } @article { ISI:000342161600057, title = {Cellulose supported cuprous iodide nanoparticles (Cell-CuI NPs): a new heterogeneous and recyclable catalyst for the one pot synthesis of 1,4-disubstituted-1,2,3-triazoles in water}, journal = {RSC Advances}, volume = {4}, number = {79}, year = {2014}, month = {SEP}, pages = {42137-42146}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Cellulose supported cuprous iodide nanoparticles (Cell-CuI NPs) have been demonstrated for the first time as an efficient heterogeneous catalyst in the click synthesis of 1,4-disubstituted 1,2,3-triazoles by a one-pot three component reaction between aralkyl/alkyl bromides, alkynes and sodium azide in water. The catalyst has been characterized by XRD, HRTEM, SEM, ICP-AES, EDS as well as IR spectroscopy. It was found to be reusable for five consecutive runs without significant loss of activity.

}, issn = {2046-2069}, doi = {10.1039/c4ra05080k}, author = {Chavan, Pramod V. and Pandit, Kapil S. and Desai, Uday V. and Kulkarni, Makarand A. and Wadgaonkar, Prakash P.} } @article { ISI:000329299200005, title = {Comparison of sodium zirconium phosphate and calcium zirconium phosphate structures for the retention of fluoride}, journal = {Journal of Radioanalytical and Nuclear Chemistry}, volume = {299}, number = {1}, year = {2014}, month = {JAN}, pages = {19-24}, publisher = {SPRINGER}, type = {Article}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

Fluoride anion interaction has been explored for the first time to investigate how the structure of sodium zirconium phosphate (NZP) and calcium zirconium phosphate (CZP) can be altered in its presence. Different compositions were made by adding NaF and CaF2 in CZP and NZP matrices respectively. Fluoride interaction differs with NZP and CZP structure as suggested by F-NMR data. The addition of fluoride to the NZP or CZP structure enables to stabilize the structure at a low temperature of 600-700 A degrees C under microwave conditions.

}, keywords = {F-NMR, Fluoride characterization, Microwave, NZP, PIGE}, issn = {0236-5731}, doi = {10.1007/s10967-013-2741-2}, author = {Dey, Ambarish and Das Gupta, Amit and Basu, Debrata and Ambashta, Ritu D. and Wattal, P. K. and Kumar, Sanjiv and Body, Monique and Rajamohanan, P. R.} } @article { ISI:000337783800074, title = {Enhanced capacitance retention in a supercapacitor made of carbon from sugarcane bagasse by hydrothermal pretreatment}, journal = {Energy \& Fuels}, volume = {28}, number = {6}, year = {2014}, month = {JUN}, pages = {4233-4240}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

A unique morphology-controlling protocol involving hydrothermal preprocessing before pyrolysis is presented to convert cellulosic waste in the form of sugarcane bagasse into three-dimensional (3D) interconnected, conducting, and high surface area carbon nanochannels. The large buffer spaces in such a porous carbon sample yield impressive electrochemical capacitance (C-sp) of 280 F/g at a current density of 1 A/g (and 275 F/g at 5 mV/s), with 72\% retention even at a very high current density of 20 A/g. In contrast, the non-hydrothermally treated sample exhibits a C-sp value of 180 F/g at 1 A/g and only 52\% retention at 20 A/g. The much better performance of the hydrothermally preprocessed bagasse-derived carbon (BHAC) can be ascribed to the solvent retention inside the buffer spaces created, negating the diffusional limitations of pore inaccessibility at higher scan rates. The BHAC has a high surface area of 1260 m(2)/g with a fairly good (11 wt \%) concentration of oxygen functionality. The material renders a good energy density of Wh/kg at a power density of 3.5 kW/kg and shows good cyclability of 90\% after 1000 charge/discharge cycles.

}, issn = {0887-0624}, doi = {10.1021/ef500342d}, author = {Wahid, Malik and Puthusseri, Dhanya and Phase, Deodatta and Ogale, Satishchandra} } @article { ISI:000341152600073, title = {Enhanced field emission properties of doped graphene nanosheets with layered SnS2}, journal = {Applied Physics Letters}, volume = {105}, number = {4}, year = {2014}, month = {JUL}, pages = {043109}, publisher = {AMER INST PHYSICS}, address = {CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA}, abstract = {

We report here our experimental investigations on p-doped graphene using tin sulfide (SnS2), which shows enhanced field emission properties. The turn on field required to draw an emission current density of 1 mu A/cm(2) is significantly low (almost half the value) for the SnS2/reduced graphene oxide (RGO) nanocomposite (2.65 V/mu m) compared to pristine SnS2 (4.8 V/mu m) nanosheets. The field enhancement factor beta (similar to 3200 for the SnS2 and similar to 3700 for SnS2/RGO composite) was calculated from Fowler-Nordheim (F-N) plots, which indicates that the emission is from the nanometric geometry of the emitter. The field emission current versus time plot shows overall good emission stability for the SnS2/RGO emitter. The magnitude of work function of SnS2 and a SnS2/graphene composite has been calculated from first principles density functional theory (DFT) and is found to be 6.89 eV and 5.42 eV, respectively. The DFT calculations clearly reveal that the enhanced field emission properties of SnS2/RGO are due to a substantial lowering of the work function of SnS2 when supported by graphene, which is in response to p-type doping of graphene. (C) 2014 AIP Publishing LLC.

}, issn = {0003-6951}, doi = {10.1063/1.4892001}, author = {Rout, Chandra Sekhar and Joshi, Padmashree D. and Kashid, Ranjit V. and Joag, Dilip S. and More, Mahendra A. and Simbeck, Adam J. and Washington, Morris and Nayak, Saroj K. and Late, Dattatray J.} } @article { ISI:000340591000030, title = {Fluorescent polymeric ionic liquids for the detection of nitroaromatic explosives}, journal = {Journal of Materials Chemistry A}, volume = {2}, number = {34}, year = {2014}, month = {JUL}, pages = {13983-13989}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

We report, for the first time, applicability of film forming polymeric ionic liquids (PILs) possessing pyrene and anthracene fluorophores for the detection of nitroaromatics (NACs). These functionalized PILs were synthesized via post modification of thermo-chemically and mechanically stable polybenzimidazole (PBI). Formed PILs were evaluated for their ability to detect NACs through quenching of fluorescence intensity. Quenching of fluorescence intensity in solution state for NACs, such as nitrobenzene (NB), 2,4,6-trinitrotoluene (TNT) and picric acid (PA), was found to be rapid in both the PILs possessing pyrene and anthracene. The solution-phase Stern-Volmer quenching constants for PA were higher than for other NACs. After these promising results, self-standing films (similar to 12 mm thick) were also evaluated for fluorescence quenching by NACs as well as possible interferents of different nature. These films also exhibited rapid and selective fluorescence quenching when exposed to the saturated vapors of NACs at ambient temperature and pressure. Fluorescence emission of PIL films was affected little by the presence of commonly found interferents. Furthermore, fluorescence intensity could be recovered after the quenching, enabling the reuse of these PIL films for detection of NACs. Smart performance of these films and ease of preparation qualify them as attractive candidates in developing sensor devices for sensitive NACs detection in presence of possible interferents.

}, issn = {2050-7488}, doi = {10.1039/c4ta02766c}, author = {Shaligram, Sayali and Wadgaonkar, Prakash P. and Kharul, Ulhas K.} } @article { ISI:000338980500002, title = {Formation of a room temperature stable Fe-V(O) complex: reactivity toward unactivated C-H bonds}, journal = {Journal of American Chemical Society}, volume = {136}, number = {27}, year = {2014}, month = {JUL}, pages = {9524-9527}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

An Fe-V(O) complex has been synthesized from equimolar solutions of (Et4N)(2)[Fe-III(Cl)(biuretamide)] and mCPBA in CH3CN at room temperature. The Fe-V(O) complex has been characterized by UV-vis, EPR, Mossbauer, and HRMS and shown to be capable of oxidizing a series of alkanes having C-H bond dissociation energies ranging from 99.3 kcal mol(-1) (cyclohexane) to 84.5 kcal mori (cumene). Linearity in the Bell-Evans-Polayni graph and the finding of a large kinetic isotope effect suggest that hydrogen abstraction is engaged the rate-determining step.

}, issn = {0002-7863}, doi = {10.1021/ja412537m}, author = {Ghosh, Munmun and Singh, Kundan K. and Panda, Chakadola and Weitz, Andrew and Hendrich, Michael P. and Collins, Terrence J. and Dhar, Basab B. and Sen Gupta, Sayam} } @article { ISI:000345654000087, title = {From micron to nano-curcumin by sophorolipid co-processing: highly enhanced bioavailability, fluorescence, and anti-cancer efficacy}, journal = {RSC Advances}, volume = {4}, number = {104}, year = {2014}, month = {NOV}, pages = {60334-60341}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Co-sonication of curcumin and acidic sophorolipid in aqueous solution is shown to lead to a dramatic enhancement of curcumin bioavailability through size reduction and encapsulation. The interaction between the two is studied and discussed based on optical absorption, photoluminescence, dynamic light scattering (DLS), zeta potential, FE-SEM, TEM, Infrared spectroscopy and X-ray diffraction measurements. The cytotoxicity effects of curcumin on breast cancer cell lines, MCF-7 and MDA-MB-231, are shown to be significantly enhanced by the formation of its complex with sophorolipid. The relative cytotoxicity of curcumin with its SL(A) complex is more due to the presence of the glucose moiety. The results further suggest that sophorolipid based formulations, which solubilize and nano-encapsulate curcumin after lipid digestion, show great potential for curcumin cell entry.

}, issn = {2046-2069}, doi = {10.1039/c4ra07300b}, author = {Singh, Pradeep Kumar and Wani, Kirtee and Kaul-Ghanekar, Ruchika and Prabhune, Asmita and Ogale, Satishchandra} } @article { ISI:000333581400004, title = {Functionalization of cardanol: towards biobased polymers and additives}, journal = {Polymer Chemistry}, volume = {5}, number = {9}, year = {2014}, month = {OCT}, pages = {3142-3162}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Among the renewable resource materials, cashew nut shell liquid (CNSL) is considered as an important starting material due to its unique structural features, abundant availability and low cost. A large number of chemicals and products have been developed starting from CNSL by taking advantage of the three reactive sites, namely, phenolic hydroxyl, aromatic ring and unsaturation(s) in the alkenyl side chain. This comprehensive review deals with general information on CNSL, its purification and separation methods, reactivity and applications in polymer chemistry.

}, issn = {1759-9954}, doi = {10.1039/c3py01194a}, author = {Voirin, Coline and Caillol, Sylvain and Sadavarte, Nilakshi V. and Tawade, Bhausaheb V. and Boutevin, Bernard and Wadgaonkar, Prakash P.} } @article { ISI:000336072400003, title = {Graphene quantum dots conjugated albumin nanoparticles for targeted drug delivery and imaging of pancreatic cancer}, journal = {Journal of Materials Chemistry B}, volume = {2}, number = {21}, year = {2014}, month = {JUN}, pages = {3190-3195}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Pancreatic cancer is considered to be the deadliest of all cancers due to its poor prognosis and resistance to conventional therapies. In this study, the potential of hyaluronic acid functionalized and green fluorescent graphene quantum dot (GQD)-labeled human serum albumin nanoparticles for pancreatic cancer specific drug delivery and bioimaging was explored. GQDs with tunable fluorescence properties and biocompatibility have attracted much more interest in recent years as compared to their metal semiconductor counterparts. We adopted lawsone (2-hydroxy-1,4-naphthoquinone) as a novel reducing agent for the synthesis of quantum dots and, in addition to excellent fluorescence of the synthesized GQDs, a good quantum yield of similar to 14\% was also obtained. Gemcitabine, the most preferred drug for pancreatic cancer treatment, was encapsulated in albumin nanoparticles, and it was observed that our nanoformulation significantly enhanced the bioavailability and sustained release property of the drug to pancreatic cancer cells in vitro. Moreover, the GQD-mediated bioimaging was excellent and enhanced the efficacy of our system as a drug delivery vehicle.

}, issn = {2050-750X}, doi = {10.1039/c4tb00015c}, author = {Nigam, Preeti and Waghmode, Shobha and Louis, Michelle and Wangnoo, Shishanka and Chavan, Pooja and Sarkar, Dhiman} } @article { ISI:000342766500050, title = {High performance all-organic flexural piezo-FET and nanogenerator via nanoscale soft-interface strain modulation}, journal = {Physical Chemistry Chemical Physics}, volume = {16}, number = {41}, year = {2014}, month = {SEP}, pages = {22874-22881}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Flexural strain fields are encountered in a wide variety of situations and invite novel device designs for their effective use in sensing, actuating, as well as energy harvesting (nanogenerator) applications. In this work we demonstrate an interesting all-organic device design comprising an electrospun P(VDF-TrFE) fiber-mat built directly on a conducting PANI film, which is also grown on a flexible PET substrate, for flexural piezo-FET and nanogenerator applications. Orders of magnitude stronger modulation of electrical transport in PANI film is realized in this device as compared to the case of a similar device but with a uniform spin-coated P(VDF-TrFE) film. We find that in the flexural mode of operation, the interaction between the laterally modulated nanoscale strain field distributions created by the fibers and the applied coherent strain field strongly influences the carrier transport in PANI. The transport modulation is suggested to occur due to strain-induced conformational changes in P(VDF-TrFE) leading to changes in carrier localization-delocalization. We further show that the fiber-mat based device system also works as an efficient nanogenerator capable of delivering power for low power applications.

}, issn = {1463-9076}, doi = {10.1039/c4cp02155j}, author = {Dhakras, Dipti and Gawli, Yogesh and Chhatre, Shraddha and Wadgaonkar, Prakash and Ogale, Satishchandra} } @article { ISI:000340469800024, title = {Highly efficient chiral resolution of DL-arginine by cocrystal formation followed by recrystallization under preferential-enrichment conditions}, journal = {Chemistry-A European Journal}, volume = {20}, number = {33}, year = {2014}, month = {AUG}, pages = {10343-10350}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

An excellent chiral symmetry-breaking spontaneous enantiomeric resolution phenomenon, denoted preferential enrichment, was observed on recrystallization of the 1:1 cocrystal of dl-arginine and fumaric acid, which is classified as a racemic compound crystal with a high eutectic ee value (\>95\%), under non-equilibrium crystallization conditions. On the basis of temperature-controlled video microscopy and in situ time-resolved solid-state (CNMR)-C-13 spectroscopic studies on the crystallization process, a new mechanism of phase transition that can induce preferential enrichment is proposed.

}, keywords = {Amino acids, chiral resolution, cocrystals, Crystal growth, phase transitions}, issn = {0947-6539}, doi = {10.1002/chem.201402446}, author = {Iwama, Sekai and Kuyama, Kazunori and Mori, Yuko and Manoj, Kochunnoonny and Gonnade, Rajesh G. and Suzuki, Katsuaki and Hughes, Colan E. and Williams, P. Andrew and Harris, Kenneth D. M. and Veesler, Stephane and Takahashi, Hiroki and Tsue, Hirohito and Tamura, Rui} } @article {43228, title = {In situ characterisation of nanoscale electromechanical properties of quasi-two-dimensional MoS2 and MoO3, arXiv preprint arXiv}, journal = {Condensed Matter Materials Science}, volume = {1}, year = {2014}, month = {SEP}, abstract = {

Precise manipulation of electronic band structures of two-dimensional (2D) transition metal dichalcogenides and oxides (TMD\&Os) via localised strain engineering is an exciting avenue for exploiting their unique characteristics for electronics, optoelectronics, and nanoelectromechanical systems (NEMS) applications. This work experimentally demonstrates that mechanically-induced electrical transitions can be engineered in quasi-2D molybdenum disulphide (MoS2) and molybdenum trioxide (MoO3) using an in situ electrical nanoindentation technique. It is shown that localised strains on such quasi-2D layers can induce carrier transport alterations, thereby changing their electrical conduction behaviour. Such strain effects offer a potential tool for precisely manipulating the electronic transport properties of 2D TMD\&Os, and understanding the interactions of the atomic electronic states in such layered materials.

}, author = {Walia, Sumeet and Nili, Hussein and Balendhran, Sivacarendran and Late, Dattatray J. and Sriram, Sharath and Bhaskaran, Madhu} } @article { ISI:000338605600002, title = {Influence of starting precursors and synthesis methods on the physiochemical properties of zirconia}, journal = {Materials Research Bulletin}, volume = {55}, year = {2014}, month = {JUL}, pages = {8-12}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

Under identical and judiciously pre-optimized synthesis conditions, the influence of different combinations of zirconium sources and/or post treatment conditions on structural properties, thermal stability, phase composition and morphology of zirconia has been investigated. High surface area tetragonal zirconia could be synthesized in a cost-effective manner from 1 M solution of zirconium oxynitrate at pH 11 using aqueous ammonia solution as a precipitant when calcined at 400 degrees C for 3 h. Irrespective of the preparation method, pH and starting precursor, zirconia samples prepared without digestion contained dominant monoclinic phase with some traces of tetragonal phase when calcined at 700 degrees C. Even though there is linear decrease in surface area with increase in the crystallite size for each sample as a function of calcination temperature, no co-relation between the surface area and crystallite size could be achieved. SEM images show agglomerated and irregular shape particles between 10 to 20 mu m. (C) 2014 Elsevier Ltd. All rights reserved.

}, keywords = {Oxides, Sol-gel chemistry, Thermogravimetric analysis (TGA)}, issn = {0025-5408}, doi = {10.1016/j.materresbull.2014.03.010}, author = {Gaydhankar, T. R. and Jha, Ratnesh Kumar and Nikalje, M. D. and Waghmare, K. J.} } @article { ISI:000343974100034, title = {Linearly polarized emission from self-assembled microstructures of mesogenic polythiophenes}, journal = {Physical Chemistry Chemical Physics}, volume = {16}, number = {43}, year = {2014}, month = {SEP}, pages = {23809-23818}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

This work reports on linearly polarized photoluminescence and electroluminescence through spontaneous self-assembly of mesogenic polythiophenes under ambient conditions. A systematic structural variation and different alkyl chain lengths lead to three series of closely related mesogenic polythiophenes viz.; TPn, TNn and TVn. Polarized light emitting diodes fabricated from TV12 by solution processing with the configuration of ITO/PEDOT:PSS/Polymer/Al show linearly polarized electroluminescence with a dichroic ratio of 14.32. Spun thin films of TV12 elicited a dichroic ratio of 15.02 in photoluminescence. Studies using a range of techniques such as; atomic force microscopy, grazing incidence X-ray diffraction, fluorescence anisotropy, linear dichroism, fluorescence lifetime and dynamic light scattering reveal that the presence of highly ordered self-assembly was responsible for the dimensional confinement of optoelectronic properties. The ordering in the thin films originates from vinyl groups in the side chains of the TV12 polymer. Further studies on device characteristics show higher charge carrier mobility in polymers with vinyl side chains. Solution processed PLEDs show a maximum brightness of 863 cd m(-2) for the TP12 polymer and TV12 based LEDs show a maximum brightness of 524 cd m(-2).

}, issn = {1463-9076}, doi = {10.1039/c4cp03457k}, author = {Ananthakrishnan, Soundaram Jeevarathinam and Wadgaonkar, Prakash P. and Somanathan, Narayanasastri} } @article { ISI:000344791100009, title = {Metallic few-layer flowerlike VS2 nanosheets as field emitters}, journal = {European Journal of Inorganic Chemistry}, number = {31}, year = {2014}, month = {NOV}, pages = {5331-5336}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

We report first-principles DFT calculations of the single-layer VS2 work function, the experimental synthesis of flower-like few-layer-thick VS2 nanosheets by a simple one-step hydrothermal method, and the investigation of their field emission properties. The turn-on field required to draw emission current densities of 1 and 10 mu A/cm(2) were 4 and 5.01 V/mu m, respectively. The observed turn-on field values are attributed to the high field enhancement factor (ca. 2500), which is due to presence of sharp protrusions in the VS2 nanosheets. Furthermore, the field-emission current stability of the VS2 emitter shows stable behavior over a period of 12 h. Further, DFT calculations show that the work function (f) of the single-layer VS2 emitter is 6.01 eV.

}, keywords = {Density functional calculations, field emission, Layered compounds, Nanostructures, Sulfur, Vanadium}, issn = {1434-1948}, doi = {10.1002/ejic.201402448}, author = {Rout, Chandra Sekhar and Khare, Ruchita T. and Kashid, Ranjit V. and Joag, Dilip S. and More, Mahendra A. and Lanzillo, Nicholas A. and Washington, Morris and Nayak, Saroj K. and Late, Dattatray J.} } @article { ISI:000339807200033, title = {Modeling gating charge and voltage changes in response to charge separation in membrane proteins}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, volume = {111}, number = {31}, year = {2014}, month = {AUG}, pages = {11353-11358}, publisher = {NATL ACAD SCIENCES}, address = {2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA}, abstract = {

Measurements of voltage changes in response to charge separation within membrane proteins can offer fundamental information on mechanisms of charge transport and displacement processes. A recent example is provided by studies of cytochrome c oxidase. However, the interpretation of the observed voltage changes in terms of the number of charge equivalents and transfer distances is far from being trivial or unique. Using continuum approaches to describe the voltage generation may involve significant uncertainties and reliable microscopic simulations are not yet available. Here, we attempt to solve this problem by using a coarse-grained model of membrane proteins, which includes an explicit description of the membrane, the electrolytes, and the electrodes. The model evaluates the gating charges and the electrode potentials (c.f. measured voltage) upon charge transfer within the protein. The accuracy of the model is evaluated by a comparison of measured voltage changes associated with electron and proton transfer in bacterial photosynthetic reaction centers to those calculated using our coarse-grained model. The calculations reproduce the experimental observations and thus indicate that the method is of general use. Interestingly, it is found that charge-separation processes with different spatial directions (but the same distance perpendicular to the membrane) can give similar observed voltage changes, which indicates that caution should be exercised when using simplified interpretation of the relationship between charge displacement and voltage changes.

}, keywords = {bacterial reaction center, electrogenicity, membrane potential, proton/electron transfer}, issn = {0027-8424}, doi = {10.1073/pnas.1411573111}, author = {Kim, Ilsoo and Chakrabarty, Suman and Brzezinski, Peter and Warshel, Arieh} } @article { ISI:000342687200060, title = {Molecular investigations of protriptyline as a multi-target directed ligand in alzheimer{\textquoteright}s disease}, journal = {Plos One}, volume = {9}, number = {8}, year = {2014}, month = {AUG}, pages = {e105196}, publisher = {PUBLIC LIBRARY SCIENCE}, address = {1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA}, abstract = {

Alzheimer{\textquoteright}s disease (AD) is a complex neurodegenerative disorder involving multiple cellular and molecular processes. The discovery of drug molecules capable of targeting multiple factors involved in AD pathogenesis would greatly facilitate in improving therapeutic strategies. The repositioning of existing non-toxic drugs could dramatically reduce the time and costs involved in developmental and clinical trial stages. In this study, preliminary screening of 140 FDA approved nervous system drugs by docking suggested the viability of the tricyclic group of antidepressants against three major AD targets, viz. Acetylcholinesterase (AChE), beta-secretase (BACE-1), and amyloid beta (A beta) aggregation, with one member, protriptyline, showing highest inhibitory activity. Detailed biophysical assays, together with isothermal calorimetry, fluorescence quenching experiments, kinetic studies and atomic force microscopy established the strong inhibitory activity of protriptyline against all three major targets. The molecular basis of inhibition was supported with comprehensive molecular dynamics simulations. Further, the drug inhibited glycation induced amyloid aggregation, another important causal factor in AD progression. This study has led to the discovery of protriptyline as a potent multi target directed ligand and established its viability as a promising candidate for AD treatment.

}, issn = {1932-6203}, doi = {10.1371/journal.pone.0105196}, author = {Bansode, Sneha B. and Jana, Asis K. and Batkulwar, Kedar B. and Warkad, Shrikant D. and Joshi, Rakesh S. and Sengupta, Neelanjana and Kulkarni, Mahesh J.} } @article { ISI:000330814200017, title = {Nanodiamond particles/reduced graphene oxide composites as efficient supercapacitor electrodes}, journal = {Carbon}, volume = {68}, year = {2014}, month = {MAR}, pages = {175-184}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

The paper reports on the preparation of reduced graphene oxide (rGO) modified with nanodiamond particles composites by a simple solution phase and their use as efficient electrode in electrochemical supercapacitors. The technique relies on heating aqueous solutions of graphene oxide (GO) and nanodiamond particles (NDs) at different ratios at 100 degrees C for 48 h. The morphological properties, chemical composition and electrochemical behavior of the resulting rGO/NDs nanocomposites were investigated using UV/vis spectrometry, Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, transmission electron microscopy (TEM) and electrochemical means. The electrochemical performance, including the capacitive behavior of the rGO/NDs composites were investigated by cyclic voltammetry and galvanostatic charge/discharge curves at 1 and 2 A g(-1) in 1 M H2SO4. The rGO/ND matrix with 10/1 ratio displayed the best performance with a specific capacitance of 186 +/- 10 F g (-1) and excellent cycling stability. (C) 2013 Elsevier Ltd. All rights reserved.

}, issn = {0008-6223}, doi = {10.1016/j.carbon.2013.10.077}, author = {Wang, Qi and Plylahan, Nareerat and Shelke, Manjusha V. and Devarapalli, Rami Reddy and Li, Musen and Subramanian, Palaniappan and Djenizian, Thierry and Boukherroub, Rabah and Szunerits, Sabine} } @article { ISI:000341363200040, title = {Nickel ferrite nanoparticles-hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides}, journal = {RSC Advances}, volume = {4}, number = {69}, year = {2014}, month = {JUL}, pages = {36702-36707}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Nickel ferrite nanoparticles-hydrogen peroxide has been demonstrated for the first time as a green and efficient catalyst-oxidant combination in the chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides. This magnetically separable catalyst was found to be reusable for five consecutive runs without appreciable change in the activity, as well as composition of the catalyst. The mechanism for the oxidation of thiols and sulfides has also been proposed.

}, issn = {2046-2069}, doi = {10.1039/c4ra04095c}, author = {Kulkarni, Aparna M. and Desai, Uday V. and Pandit, Kapil S. and Kulkarni, Makarand A. and Wadgaonkar, Prakash P.} } @article { ISI:000330822000009, title = {Polystyrene/TiO2 composite electrospun fibers as fillers for poly(butylene succinate-co-adipate): Structure, morphology and properties}, journal = {European Polymer Journal}, volume = {50}, year = {2014}, month = {JAN}, pages = {78-86}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

In this work, composite polystyrene/titanium dioxide (PS/TiO2) electrospun fibers were used as a reinforcement for a poly(butylene succinate-co-adipate) (PBSA) matrix. The structure, morphology, mechanical properties and degradation behavior of such materials were investigated, finding that, as a function of their TiO2 content, the fibers exerted different effects. The main mechanism through which the fibers modified the structure and morphology of the polymer matrix is by altering its crystallization kinetics. The presence of TiO2 modified the roughness of the fibers and therefore affected the interfacial adhesion between the filler and the matrix. The modulus of PBSA was improved, even though the brittleness of the materials was increased by the presence of the fibers. Different amounts of TiO2 within the fibers allowed to tune the hydrolytic degradation rate of the composites. This paper shows the potential of using composite electrospun fibers as effective fillers for the preparation of polymer-based composites. (C) 2013 Elsevier Ltd. All rights reserved.

}, keywords = {Biodegradable polymers, Degradation, electrospinning, Morphology, Nanocomposites, Polycaprolactone}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2013.11.002}, author = {Neppalli, Ramesh and Causin, Valerio and Benetti, Edmondo Maria and Ray, Suprakas Sinha and Esposito, Antonella and Wanjale, Santosh and Birajdar, Mallinath S. and Saiter, Jean-Marc and Marigo, Antonio} } @article { ISI:000351153700001, title = {Processable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization}, journal = {Journal of Polymer Research}, volume = {21}, number = {12}, year = {2014}, month = {NOV}, pages = {617}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

A new bisphenol viz., 4-(4-hydroxyphenoxy)-3-pentadecylphenol (HPPDP) was synthesized starting from cashew nut shell liquid (CNSL). Aromatic (co)polyesters containing ether linkages in the main chain and pendent pentadecyl chains were synthesized by the interfacial polycondensation of HPPDP with terephthalic acid chloride (TPC), isophthalic acid chloride (IPC) and a mixture of TPC and IPC (50: 50 mol \%) and by polycondenation of varying composition of HPPDP and bisphenol-A (BPA) with TPC. The resultant (co) polyesters exhibited inherent viscosities in the range 0.70-1.21 dL g(-1) and number-average molecular weights in the range 16,000-48,200 (GPC, polystyrene standard). Polyesters were soluble in common organic solvents such as chloroform and dichloromethane and could be cast into films from chloroform solution. Polyesters exhibited T-10 values in the range 430-455 degrees C and Tg values were in the range 29-202 degrees C. Dynamic mechanical storage modulus and maximum on transition of tan delta curve decreased with increased content of HPPDP in copolyesters. Importantly, the large difference between Tg and T-10 values offers the possibility to process these polyesters in the melt.

}, keywords = {Aromatic polyesters, Cashew nut shell liquid, pentadecyl, Polycondensation, processability, Thermal properties}, issn = {1022-9760}, doi = {10.1007/s10965-014-0617-y}, author = {Tawade, Bhausaheb V. and Salunke, Jagadish K. and Sane, Prakash S. and Wadgaonkar, Prakash P.} } @article { ISI:000339880300021, title = {Proteomics of arsenic stress in the gram-positive organism Exiguobacterium sp PS NCIM 5463}, journal = {Applied Microbiology and Biotechnology}, volume = {98}, number = {15}, year = {2014}, month = {AUG}, pages = {6761-6773}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

The general responses of microorganisms to environmental onslaughts are modulated by altering the gene expression pattern to reduce damage in the cell and produce compensating stress responses. The present study attempts to unravel the response of the Gram-positive Exiguobacterium sp. PS NCIM 5463 in the presence of [As(III)] and arsenate [As(V)] using comparative proteomics via two-dimension gel electrophoresis (2-DE) coupled with identification of proteins using matrix-assisted laser desorption/ionisation (MALDI-TOF/MALDI-TOF/TOF). Out of 926 Coomassie-stained proteins, 45 were differentially expressed (p \< 0.05). Considering the resolution and abundance level, 24 spots (peptides) were subjected to MALDI analysis, identified and categorised into several functional categories, viz., nitrogen metabolism, energy and stress regulators, carbohydrate metabolism, protein synthesis components and others. A functional role of each protein is discussed in Exiguobacterium sp. PS 5463 under arsenic stress and validated at their transcript level using a quantitative real-time polymerase chain reaction. Unlike previous reports that unravel the responses toward arsenic stress in Gram-negative organisms, the present study identified new proteins under arsenic stress in a Gram-positive organism, Exiguobacterium sp. PS NCIM 5463, which could elucidate the physiology of organisms under arsenic stress.

}, keywords = {Arsenic, Exiguobacterium, proteomics, Stress, Transcriptomics}, issn = {0175-7598}, doi = {10.1007/s00253-014-5873-6}, author = {Sacheti, Poonam and Patil, Rajendra and Dube, Ankita and Bhonsle, Hemangi S. and Thombre, Dipalee and Marathe, Sayali and Vidhate, Ravindra and Wagh, Priyanka and Kulkarni, Mahesh J. and Rapole, Srikanth and Gade, Wasudeo N.} } @article { ISI:000343750700045, title = {Pyrene based conjugated materials: synthesis, characterization and electroluminescent properties}, journal = {Physical Chemistry Chemical Physics}, volume = {16}, number = {42}, year = {2014}, month = {NOV}, pages = {23320-23328}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

In this work, three novel pyrene cored small conjugated molecules, namely 1,3,6,8-tetrakis(6-(octyloxy)naphthalene-2-yl) pyrene (PY-1), 1,3,6,8-tetrakis((E)-2-(6-(n-octyloxy) naphthalene-2-yl) vinyl) pyrene (PY-2) and 1,3,6,8-tetrakis((6-(n-octyloxy) naphthalene-2-yl) ethynyl) pyrene (PY-3) have been synthesized by Suzuki, heck and Sonogashira organometallic coupling reactions, respectively. The effects of single, double and triple bonds on their optical, electrochemical, and thermal properties are studied in detail. These all materials are fluorescent and they have been used in organic light-emitting diodes (OLEDs) and their electroluminescent properties have been studied.

}, issn = {1463-9076}, doi = {10.1039/c4cp03693j}, author = {Salunke, Jagadish K. and Sonar, Prashant and Wong, F. L. and Roy, V. A. L. and Lee, C. S. and Wadgaonkar, Prakash P.} } @article { ISI:000328892300038, title = {Quantum confinement controlled solar hydrogen production from hydrogen sulfide using a highly stable CdS0.5Se0.5/CdSe quantum dot-glass nanosystem}, journal = {Nanoscale}, volume = {6}, number = {2}, year = {2014}, month = {OCT}, pages = {908-915}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

We have demonstrated unique CdS0.5Se0.5 and CdSe quantum dot-glass nanosystems with quantum confinement effect. The stable, monodispersed CdS0.5Se0.5 and CdSe quantum dots (QDs) of size 2 to 12 nm have been grown in a germanate glass matrix by a simple melt quench technique at moderate temperature. XRD and Raman studies show formation of hexagonal CdS0.5Se0.5 and CdSe in the glass matrix. The quantum confinement of CdS0.5Se0.5 and CdSe was studied using TEM and UV-Vis spectroscopy. The band gap of the glass nanosystem was tuned from 3.6 to 1.8 eV by controlling the CdS0.5Se0.5 quantum dot size in the glass matrix. It can be further tuned to 1.68 eV using growth of CdSe quantum dots in the glass matrix. Considering the tuneable band gap of the CdS0.5Se0.5 and CdSe quantum dot-glass nanosystem for the visible light absorption, a study of size tuneable photocatalytic activity for hydrogen generation from hydrogen sulfide splitting was performed under visible light irradiation for the first time. The utmost hydrogen evolution, i.e. 8164.53 and 7257.36 mu mol h(-1) g(-1) was obtained for the CdS0.5Se0.5 and CdSe quantum dot-glass nanosystems, respectively. The apparent quantum yield (AQY) was observed to be 26\% and 21\% for the CdS0.5Se0.5 and CdSe quantum dot-glass nanosystems, respectively. It is noteworthy that the present glass nanosystem as a photocatalyst was found to be very stable as compared to naked powder photocatalysts.

}, issn = {2040-3364}, doi = {10.1039/c3nr04898e}, author = {Apte, Sanjay K. and Garaje, Sunil N. and Naik, Sonali D. and Waichal, Rupali P. and Baeg, Jin-Ook and Kale, Bharat B.} } @article { ISI:000342254500047, title = {Reaction between lawsone and aminophenol derivatives: synthesis, characterization, molecular structures and antiproliferative activity}, journal = {Journal of Molecular Structure}, volume = {1075}, year = {2014}, month = {OCT}, pages = {397-405}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Reaction between two bioreductive reactants lawsone (2-hydroxy-1,4-napthoquinone) and derivatives 2-aminophenol without catalyst is reported. The reaction between lawsone and 4-chloro-2-aminophenol leads to formation of red colored major product 1A:[2-[(5-chloro-hydroxyphenyl)amino]naphthalene-1,4-dione] and fluorescent orange colored minor compound 1B:[10-chloro-benzo[alpha]phenoxazine-5-one]. Molecular structure of 1A and 1B were determined by single crystal X-ray diffraction. Two mechanisms were proposed to the formation of red 1A and 1B. {\textquoteleft}Ortho-para{\textquoteright} tautomeric equilibrium was observed in DMSO-d(6) solution in 1A, which was revealed by H-1, C-13 NMR and LC-MS studies. Molecules of 1A formed dimers via N-H center dot center dot center dot O interaction and polymeric chain of dimers was formed by OH center dot center dot center dot O interactions. Cl center dot center dot center dot Cl interactions were observed between the polymeric chains of dimers in 1A. Molecules of 1B show Cl center dot center dot center dot N interaction. Antiproliferative properties is studied for 1A-5A compounds (obtained by the reaction of lawsone with 2-amino-4-methylpheno1;2A, 2-aminopheno1;3A, 3-aminophenol;4A and 4-aminophenol;5A) and evaluated against two cancer cell lines, THP1 (human monocytic leukemia cells) and COLO205 (colorectal adenocarcinoma) and one normal cell line, HEK293T (human embryonic kidney). The values of 50\% inhibitory concentration (IC50) of compounds 1A-5A was determined using XTT assay. The cytotoxic effects of compounds 2A and 3A were observed against COLO205 and compounds 4A and 5A on THP1 were observed to be higher in comparison to their effect on HEK293T cell lines. (C) 2014 Elsevier B.V. All rights reserved.

}, keywords = {Aminonaphthoquinone, Aminophenol, Benzo[alpha]phenoxazine, Cl center dot center dot center dot N interactions, Lawsone, pi-pi stacking interaction}, issn = {0022-2860}, doi = {10.1016/j.molstruc.2014.07.007}, author = {Kathawate, Laxmi and Joshi, Pranya V. and Dash, Tapan Kumar and Pal, Sanjima and Nikalje, Milind and Weyhermueller, Thomas and Puranik, Vedavati G. and Konkimalla, V. Badireenath and Salunke-Gawali, Sunita} } @article { ISI:000341004800003, title = {Simple, economical, and environmentally benign protocol for the synthesis of 2-amino-3,5-dicarbonitrile-6-sulfanylpyridines at ambient temperature}, journal = {Green Chemistry Letters and Reviews}, volume = {7}, number = {3}, year = {2014}, month = {JUN}, pages = {228-235}, publisher = {TAYLOR \& FRANCIS LTD}, address = {4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND}, abstract = {

A simple, economical, and environmentally benign protocol has been described for one-pot synthesis of medicinally privileged 2-amino-3,5-dicarbonitrile-6-sulfanylpyridines by three-component condensation between aldehyde, malononitrile, and thiol using diethylamine as a catalyst. Ambient temperature and avoidance of conventional work-up as well as purification procedure qualify this cost-effective protocol for {\textquoteleft}{\textquoteleft}green synthesis.{\textquoteright}{\textquoteright}

}, keywords = {5-dicarbonitriles, diethylamine, green chemistry, multicomponent reactions, organocatalyst, pyridine-3}, issn = {1751-8253}, doi = {10.1080/17518253.2014.925144}, author = {Desai, Uday V. and Kulkarni, Makarand A. and Pandit, Kapil S. and Kulkarni, Aparna M. and Wadgaonkar, Prakash P.} } @article { ISI:000335660200006, title = {Studies on morphology of polyaniline films formed at liquid-liquid and solid-liquid interfaces at 25 and 5 A degrees C, respectively, and effect of doping}, journal = {Colloid and Polymer Science}, volume = {292}, number = {5}, year = {2014}, month = {MAY}, pages = {1079-1089}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

It is well accepted that the morphology of the nanomaterials has great effect on the properties and hence their applications. Therefore, morphology of materials has become a focus of research in the scientific world. The present study shows that interfacial polymerization and subsequent self-assembly provides a control over the morphology, nanorod/nanosheet, of polyaniline (PANI) films synthesized by liquid-liquid interface reaction technique and solid-liquid interface reaction technique. The synthesized PANI films and its particulate structure are characterized by using various spectroscopic techniques such as UV-visible, ATR-IR, Raman and XPS. The study confirmed the formation, the structure, the size and shape of particles and morphology of PANI by using analytical techniques namely, SAED, SEM and TEM. An important observation is that doping with HCl significantly improves the nanorod formation at the interface. The doped PANI electrode exhibits a higher area with rectangular shape in CV cycle and better cycle stability when compared with the performance of undoped PANI films. We believe that the results of these studies can give valuable leads to manoeuvre formation of PANI films with desired morphology for various applications.

}, keywords = {interfacial polymerization, Liquid-liquid interface, Nanorods, nanosheets, polyaniline, Self-assembly, Solid-liquid interface, Thin films}, issn = {0303-402X}, doi = {10.1007/s00396-013-3150-3}, author = {Waghmode, Babasaheb J. and Patil, Sagar H. and Jahagirdar, Mandar M. and Patil, Virendra S. and Waichal, Rupali P. and Malkhede, Dipalee D. and Sathaye, Shivaram D. and Patil, Kashinath R.} } @article { ISI:000343671700036, title = {Synthesis, characterization and in vitro study of biocompatible cinnamaldehyde functionalized magnetite nanoparticles (CPGF Nps) for hyperthermia and drug delivery applications in breast cancer}, journal = {Plos One}, volume = {9}, number = {9}, year = {2014}, month = {SEP}, pages = {e107315}, publisher = {PUBLIC LIBRARY SCIENCE}, address = {1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA}, abstract = {

Cinnamaldehyde, the bioactive component of the spice cinnamon, and its derivatives have been shown to possess anticancer activity against various cancer cell lines. However, its hydrophobic nature invites attention for efficient drug delivery systems that would enhance the bioavailability of cinnamaldehyde without affecting its bioactivity. Here, we report the synthesis of stable aqueous suspension of cinnamaldehyde tagged Fe3O4 nanoparticles capped with glycine and pluronic polymer (CPGF NPs) for their potential application in drug delivery and hyperthermia in breast cancer. The monodispersed superparamagnetic NPs had an average particulate size of similar to 20 nm. TGA data revealed the drug payload of similar to 18\%. Compared to the free cinnamaldehyde, CPGF NPs reduced the viability of breast cancer cell lines, MCF7 and MDAMB231, at lower doses of cinnamaldehyde suggesting its increased bioavailability and in turn its therapeutic efficacy in the cells. Interestingly, the NPs were non-toxic to the non-cancerous HEK293 and MCF10A cell lines compared to the free cinnamaldehyde. The novelty of CPGF nanoparticulate system was that it could induce cytotoxicity in both ER/PRpositive/Her2 negative (MCF7) and ER/PRnegative/Her2 negative (MDAMB231) breast cancer cells, the latter being insensitive to most of the chemotherapeutic drugs. The NPs decreased the growth of the breast cancer cells in a dose-dependent manner and altered their migration through reduction in MMP-2 expression. CPGF NPs also decreased the expression of VEGF, an important oncomarker of tumor angiogenesis. They induced apoptosis in breast cancer cells through loss of mitochondrial membrane potential and activation of caspase-3. Interestingly, upon exposure to the radiofrequency waves, the NPs heated up to 41.6 degrees C within 1 min, suggesting their promise as a magnetic hyperthermia agent. All these findings indicate that CPGF NPs prove to be potential nano-chemotherapeutic agents in breast cancer.

}, issn = {1932-6203}, doi = {10.1371/journal.pone.0107315}, author = {Wani, Kirtee D. and Kadu, Brijesh S. and Mansara, Prakash and Gupta, Preeti and Deore, Avinash V. and Chikate, Rajeev C. and Poddar, Pankaj and Dhole, Sanjay D. and Kaul-Ghanekar, Ruchika} } @article { ISI:000330147900013, title = {Synthesis, characterization and molecular structures of homologated analogs of 2-bromo-3-(n-alkylamino)-1,4-napthoquinone}, journal = {Journal of Molecular Structure}, volume = {1056}, year = {2014}, month = {JAN}, pages = {97-103}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Four analogues of 2-bromo-3-(n-alkylamino)-1,4-napthoquinone (where n-alkyl is methyl in L-1Br, ethyl in L-2Br, propyl in L-3Br and butyl in L-4Br) are synthesized and characterized. A reaction mechanism is proposed for the formation of L-1 Br to L-4Br from the starting material 2,3-dibromo-1,4-naphthoquinone. The v(N-H) frequency in the FT-IR spectra is affected by the intramolecular hydrogen bonding in L-1Br to L-4Br and is observed similar to 3267 cm(-1) in L-2Br. A shift of similar to 25 cm(-1) is observed in the v(C-Br) frequency in all the compounds as compared to 2,3-dibromo-1,4-naphthoquinone (627 cm(-1)). A broad charge transfer band is observed between 400 and 600 nm in the UV-Vis spectra, which imparts red colour to all the compounds. Molecular structures of L-2Br and L-3Br were studied by single crystal X-ray diffraction studies. Molecules of L-2Br crystallize in Pca2(1), whereas the molecule L-3Br crystallizes in the P-1 space group. Molecules of L-2Br forms a polymeric chain through N-H...O interaction and forms beautiful butterfly like arrangement of molecules when viewed down the {\textquoteleft}a{\textquoteright} axis. Ladder like polymeric chain of molecules is observed in L-3Br via C-H...O and N-H...O interactions. Every alternating neighbouring chains of L-3Br, show pi-pi stacking interactions between the quinonoid rings of the molecules, however this interaction is not observed in L-2Br. (C) 2013 Elsevier B.V. All rights reserved.

}, keywords = {2, 3-Dibromo-1, 4-naphthoquinone, Aminonaphthoquinone, hydrogen bonding, Michael addition, pi-pi stacking}, issn = {0022-2860}, doi = {10.1016/j.molstruc.2013.10.016}, author = {Salunke-Gawali, Sunita and Pawar, Omkar and Nikalje, Milind and Patil, Rishikesh and Weyhermueller, Thomas and Puranik, Vedavati G. and Konkimalla, V. Badireenath} } @article { ISI:000337521700009, title = {Thermal expansion, anharmonicity and temperature-dependent Raman spectra of single- and few-layer MoSe2 and WSe2}, journal = {ChemPhysChem}, volume = {15}, number = {8}, year = {2014}, month = {JUN}, pages = {1592-1598}, publisher = {WILEY-V C H VERLAG GMBH}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

We report the temperature-dependent Raman spectra of single-and few-layer MoSe2 and WSe2 in the range 77-700 K. We observed linear variation in the peak positions and widths of the bands arising from contributions of anharmonicity and thermal expansion. After characterization using atomic force microscopy and high-resolution transmission electron microscopy, the temperature coefficients of the Raman modes were determined. Interestingly, the temperature coefficient of the A(2u)(2) mode is larger than that of the A(1g) mode, the latter being much smaller than the corresponding temperature coefficients of the same mode in single-layer MoS2 and of the G band of graphene. The temperature coefficients of the two modes in single-layer MoSe2 are larger than those of the same modes in single-layer WSe2. We have estimated thermal expansion coefficients and temperature dependence of the vibrational frequencies of MoS2 and MoSe2 within a quasi-harmonic approximation, with inputs from first-principles calculations based on density functional theory. We show that the contrasting temperature dependence of the Raman-active mode A(1g) in MoS2 and MoSe2 arises essentially from the difference in their strainphonon coupling.

}, issn = {1439-4235}, doi = {10.1002/cphc.201400020}, author = {Late, Dattatray J. and Shirodkar, Sharmila N. and Waghmare, Umesh V. and Dravid, Vinayak P. and Rao, C. N. R.} } @article { ISI:000331493200090, title = {Vapor-liquid-solid growth of one-dimensional tin sulfide (sns) nanostructures with promising field emission behavior}, journal = {ACS Applied Materials \& Interfaces}, volume = {6}, number = {3}, year = {2014}, month = {FEB}, pages = {2018-2025}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Single-crystalline ultralong tin sulfide (SnS) nanowires has been grown by a thermal evaporation technique under optimized conditions on gold-coated silicon substrates, and for the first time, field emission investigations on the SnS nanowires at the base pressure of 1 X 10(-8) mbar are reported. It has been revealed that the surface morphology of the as-synthesized SnS nanostructures is significantly influenced by the deposition temperature and duration. Structural and morphological analyses of as-synthesized SnS nanostructures have been carried out using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). To understand the optical and electronic properties of as-synthesized SnS nanowires, ultraviolet-visible (UV-vis), photo-luminescence (PL), and X-ray photoelectron spectroscopy (XPS) studies were carried out. The SEM and TEM measurements reveal the formation of ultralong SnS nanowires, with an average diameter of 80 nm. A plausible explanation on the vapor-solid-liquid (VLS) growth mechanism based on the experimental results and reported literature has been presented. Furthermore, the field emission characteristics of the SnS nanowires are found to be superior to the other metal chalcogenide nanostructures. The synthesized SnS nanowire emitter delivers a high current density of similar to 2.5 mA/cm(2) at an applied electric field of similar to 4.55 V/mu m. The emission current stability over a period of 6 h is observed to be good. The observed results demonstrate the potential of the SnS nanowire emitter as an electron source for practical applications in vacuum nano/microelectronic devices.

}, keywords = {Electron emission, ID nanostructure, SnS nanowires, thermal evaporation, vapor-liquid-solid (VLS) growth}, issn = {1944-8244}, doi = {10.1021/am405039j}, author = {Suryawanshi, Sachin R. and Warule, Sambhaji S. and Patil, Sandip S. and Patil, Kashinath R. and More, Mahendra A.} } @article { ISI:000344906500001, title = {Way toward {\textquoteleft}{\textquoteleft}dietary pesticides{\textquoteright}{\textquoteright}: molecular investigation of insecticidal action of caffeic acid against helicoverpa armigera}, journal = {Journal of Agricultural and Food Chemistry}, volume = {62}, number = {45}, year = {2014}, month = {NOV}, pages = {10847-10854}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Bioprospecting of natural molecules is essential to overcome serious environmental issues and pesticide resistance in insects. Here we are reporting insights into insecticidal activity of a plant natural phenol. In silico and in vitro screening of multiple molecules supported by in vivo validations suggested that caffeic acid (CA) is a potent inhibitor of Helicoverpa armigera gut proteases. Protease activity and gene expression were altered in CA-fed larvae. The structure-activity relationship of CA highlighted that all the functional groups are crucial for inhibition of protease activity. Biophysical studies and molecular dynamic simulations revealed that sequential binding of multiple CA molecules induces conformational changes in the protease(s) and thus lead to a significant decline in their activity. CA treatment significantly inhibits the insect{\textquoteright}s detoxification enzymes, thus intensifying the insecticidal effect. Our findings suggest that CA can be implicated as a potent insecticidal molecule and explored for the development of effective dietary pesticides.

}, keywords = {Caffeic acid, Helicoverpa armigera, insecticidal activity, protease inhibitor}, issn = {0021-8561}, doi = {10.1021/jf503437r}, author = {Joshi, Rakesh S. and Wagh, T. P. and Sharma, N. and Mulani, Fayaj A. and Sonavane, U. and Thulasiram, H. V. and Joshi, Rakesh S. and Gupta, Vidya S. and Giri, Ashok P.} } @book {43005, title = {Advances and recent applications in LC-MS and HPLC}, year = {2015}, pages = {94}, publisher = {Elsevier}, organization = {Elsevier}, abstract = {

Advances and Recent Applications in LC-MS and HPLC presents the most recent developments in liquid chromatography and mass spectrometry techniques. The book{\textquoteright}s content reaches across a range of disciplines and cites several case studies to effectively capture the advanced applications that make LC-MS and HPLC multifunctional and exacting techniques. Liquid chromatography and mass spectrometry systems generate chromatograms of column peaks and can provide molecular weights of separated materials and their solvent complexes. However, while these systems can provide structural information to confirm the identity of the compounds separated, the process is very expensive. This book provides identification of simple compounds resulting from fragmentation studies and their subsequent results, offering the reader access to information unavailable elsewhere and allowing researchers to avoid incurring the costs associated with obtaining the hands-on results that LC-MS systems generate. Applicable to chemical analysis, bioanalysis, and medicinal chemistry, as well as pharmaceutical science, synthetic chemistry, and industrial chemistry, Advances and Recent Applications in LC-MS and HPLC is a multidisciplinary reference that arms scientists with the latest research. Detailed case studies enable researchers to make the book{\textquoteright}s concepts immediately implementable.

}, author = {Azharuddin, Quazi Syed and Mahajan, Devidas T. and Masand, Vijay H. and Alafeefy, Ahmed M. and Gajbhiye, Jayant M. and El-Sayed, Nahed Nasser Eid and Wajid, Abdul and Mohammad, Noor} } @article {42933, title = {Advances in molecular quantum chemistry contained in the Q-Chem 4 program package}, journal = {Molecular Physics}, volume = {113}, year = {2015}, month = {JAN}, pages = {184-215}, abstract = {

A summary of the technical advances that are incorporated in the fourth major release of the Q-Chem quantum chemistry program is provided, covering approximately the last seven years. These include developments in density functional theory methods and algorithms, nuclear magnetic resonance (NMR) property evaluation, coupled cluster and perturbation theories, methods for electronically excited and open-shell species, tools for treating extended environments, algorithms for walking on potential surfaces, analysis tools, energy and electron transfer modelling, parallel computing capabilities, and graphical user interfaces. In addition, a selection of example case studies that illustrate these capabilities is given. These include extensive benchmarks of the comparative accuracy of modern density functionals for bonded and non-bonded interactions, tests of attenuated second order Moller-Plesset (MP2) methods for intermolecular interactions, a variety of parallel performance benchmarks, and tests of the accuracy of implicit solvation models. Some specific chemical examples include calculations on the strongly correlated Cr-2 dimer, exploring zeolite-catalysed ethane dehydrogenation, energy decomposition analysis of a charged ter-molecular complex arising from glycerol photoionisation, and natural transition orbitals for a Frenkel exciton state in a nine-unit model of a self-assembling nanotube.

}, author = {Shao, Yihan and Gan, Zhengting and Epifanovsky, Evgeny and Gilbert, Andrew T. B. and Wormit, Michael and Kussmann, Joerg and Lange, Adrian W. and Behn, Andrew and Deng, Jia and Feng, Xintian and Ghosh, Debashree} } @article {43015, title = {Carboxymethyl cellulose based multifunctional targeted drug delivery platform for pancreatic cancer: nanotheranostic potential and biocompatibility analysis}, journal = {World Journal of Pharmaceutical Sciences}, volume = {3}, year = {2015}, month = {JUL}, pages = {1347-1359}, author = {Joshi, Preeti Nigam and Wangnoo, Shishanka and Louis, Michelle} } @article { ISI:000360705500008, title = {Chemical and biological metal nanoparticles as antimycobacterial agents: a comparative study}, journal = {International Journal of Antimicrobial Agents}, volume = {46}, number = {2}, year = {2015}, month = {AUG}, pages = {183-188}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Resistance among mycobacteria leading to multidrug-resistant and extensively drug-resistant tuberculosis is a major threat. However, nanotechnology has provided new insights in drug delivery and medicine development. This is the first comparative report to determine the activity of chemically and biologically synthesised silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) against mycobacteria. Screening data revealed the high mycobactericidal efficiency of AgNPs, with minimum inhibitory concentrations (MICs) of \<3 mu g/mL, whereas no such activity was exhibited by AuNPs at concentrations up to 100 mu g/mL. Moreover, in vitro and ex vivo THP-1 infection model assays showed greater efficacy of chemical AgNPs compared with biogenic AgNPs to inhibit active and dormant stage mycobacterial growth. Up to 40\% cytotoxicity against human cell lines was observed at a AgNP concentration of 10 x MIC (30 mu g/mL) after 48 h. AgNPs were shown to have more specificity towards mycobacteria than towards other Gram-negative and Gram-positive pathogenic bacteria. The selectivity index was found to be in the range of 11-23, indicating the potential of these nanoparticles for use in developing new therapeutics for tuberculosis. (C) 2015 Elsevier B.V. and the International Society of Chemotherapy. All rights reserved.

}, keywords = {Antibiotic resistance, Antimycobacterial agent, Cytotoxicity, Mycobacteria, Nanoparticles, tuberculosis}, issn = {0924-8579}, doi = {10.1016/j.ijantimicag.2015.03.014}, author = {Singh, Richa and Nawale, Laxman U. and Arkile, Manisha A. and Shedbalkar, Utkarsha U. and Wadhwani, Sweety A. and Sarkar, Dhiman and Chopade, Balu Ananda} } @article { ISI:000358250800001, title = {Chromerid genomes reveal the evolutionary path from photosynthetic algae to obligate intracellular parasites}, journal = {Elife}, volume = {4}, year = {2015}, month = {JUL}, pages = {Article Number: e06974}, publisher = {ELIFE SCIENCES PUBLICATIONS LTD}, address = {SHERATON HOUSE, CASTLE PARK, CAMBRIDGE, CB3 0AX, ENGLAND}, abstract = {

The eukaryotic phylum Apicomplexa encompasses thousands of obligate intracellular parasites of humans and animals with immense socio-economic and health impacts. We sequenced nuclear genomes of Chromera velia and Vitrella brassicaformis, free-living non-parasitic photosynthetic algae closely related to apicomplexans. Proteins from key metabolic pathways and from the endomembrane trafficking systems associated with a free-living lifestyle have been progressively and non-randomly lost during adaptation to parasitism. The free-living ancestor contained a broad repertoire of genes many of which were repurposed for parasitic processes, such as extracellular proteins, components of a motility apparatus, and DNA-and RNA-binding protein families. Based on transcriptome analyses across 36 environmental conditions, Chromera orthologs of apicomplexan invasion-related motility genes were co-regulated with genes encoding the flagellar apparatus, supporting the functional contribution of flagella to the evolution of invasion machinery. This study provides insights into how obligate parasites with diverse life strategies arose from a once free-living phototrophic marine alga.

}, issn = {2050-084X}, doi = {10.7554/eLife.06974}, author = {Woo, Yong H. and Ansari, Hifzur and Otto, Thomas D. and Klinger, Christen M. and Kolisko, Martin and Michalek, Jan and Saxena, Alka and Shanmugam, Dhanasekaran and Tayyrov, Annageldi and Veluchamy, Alaguraj and Ali, Shahjahan and Bernal, Axel and del Campo, Javier and Cihlar, Jaromir and Flegontov, Pavel and Gornik, Sebastian G. and Hajduskova, Eva and Horak, Ales and Janouskovec, Jan and Katris, Nicholas J. and Mast, Fred D. and Miranda-Saavedra, Diego and Mourier, Tobias and Naeem, Raeece and Nair, Mridul and Panigrahi, Aswini K. and Rawlings, Neil D. and Padron-Regalado, Eriko and Ramaprasad, Abhinay and Samad, Nadira and Tomcala, Ales and Wilkes, Jon and Neafsey, Daniel E. and Doerig, Christian and Bowler, Chris and Keeling, Patrick J. and Roos, David S. and Dacks, Joel B. and Templeton, Thomas J. and Waller, Ross F. and Lukes, Julius and Obornik, Miroslav and Pain, Arnab} } @article { ISI:000360404400089, title = {Cobalt ferrite nanoparticles: a magnetically separable and reusable catalyst for Petasis-Borono-Mannich reaction}, journal = {RSC Advances}, volume = {5}, number = {86}, year = {2015}, month = {AUG}, pages = {70586-70594}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Magnetically separable cobalt ferrite nanoparticles (CoFe2O4, NPS) have been demonstrated for the first time as an efficient catalyst in Petasis-Borono-Mannich (PBM) reaction between salicylaldehydes, sec. amines and aryl boronic acids to furnish alkylaminophenols in high yields. Relatively shorter reaction times, easy purification of the products and reusability of the catalyst for five consecutive runs without appreciable loss in it{\textquoteright}s activity are the noteworthy features of the developed protocol.

}, issn = {2046-2069}, doi = {10.1039/c5ra10693a}, author = {Kulkarni, Aparna M. and Pandit, Kapil S. and Chavan, Pramod V. and Desai, Uday V. and Wadgaonkar, Prakash P.} } @article { ISI:000357498200004, title = {Combined experimental and theoretical study of the structural, electronic and vibrational properties of bulk and few-layer Td-WTe2}, journal = {Journal of Physics-Condensed Matter}, volume = {27}, number = {28}, year = {2015}, month = {JUL}, pages = {285401}, publisher = {IOP PUBLISHING LTD}, address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND}, abstract = {

The recent discovery of non-saturating giant positive magnetoresistance has aroused much interest in Td-WTe2. We have investigated structural, electronic and vibrational properties of bulk and few-layer Td-WTe2 experimentally and theoretically. Spin-orbit coupling is found to govern the semi-metallic character of Td-WTe2 and its structural link with the metallic 1 T form provides an understanding of its structural stability. There is a metal-to-insulator switch-over in the electrical conductivity and a change in the sign of the Seebeck coefficient around 373 K. Lattice vibrations of Td-WTe2 have been analyzed using first-principles calculations. Out of the 33 possible zone-center Raman active modes, five distinct Raman bands are observed around 112, 118, 134, 165 and 212 cm(-1) in bulk Td-WTe2. Based on symmetry analysis and calculated Raman tensors, we assign the intense bands at 165 cm(-1) and 212 cm(-1) to the A(1){\textquoteright} and A(1){\textquoteright}{\textquoteright} modes, respectively. Most of the Raman bands stiffen with decreasing thickness, and the ratio of the integrated intensities of the A(1){\textquoteright}{\textquoteright} to A(1){\textquoteright} bands decreases in the few-layer sample, while all the bands soften in both the bulk and few-layer samples with increasing temperature.

}, keywords = {Raman spectroscopy, Td-structure, tungsten ditelluride}, issn = {0953-8984}, doi = {10.1088/0953-8984/27/28/285401}, author = {Jana, Manoj K. and Singh, Anjali and Late, Dattatray J. and Rajamathi, Catherine R. and Biswas, Kanishka and Felser, Claudia and Waghmare, Umesh V. and Rao, C. N. R.} } @article { ISI:000346006700016, title = {Decoration of CdS nanoparticles on 3D self-assembled ZnO nanorods: a single-step process with enhanced field emission behaviour}, journal = {CrystEngComm}, volume = {17}, number = {1}, year = {2015}, month = {NOV}, pages = {140-148}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A well-defined CdS-ZnO heteroarchitecture has been synthesized via a facile single-step hydrothermal approach. The morphological and structural studies reveal the formation of 3D nano-architectures, in which self-assembled ZnO nanorods (diameter similar to 50 nm) are well decorated with single crystalline CdS nanoparticles (size similar to 10 nm). The CdS-ZnO heteroarchitecture exhibits a remarkable change in the optical absorption due to the surface modification of ZnO nanorods by CdS. Surprisingly, under identical reaction conditions, the global ZnS nanoparticles are selectively grown at the apex of ZnO nanorods on the Zn substrate. Furthermore, a plausible growth mechanism has been presented on the basis of experimental results. Interestingly, the CdS-ZnO heteroarchitecture shows enhanced field emission properties such as low turn-on field, high emission current density and better current stability in comparison to other ZnO-based nanostructures. The present CdS-ZnO heteroarchitecture could be extended to other potential applications, such as chemical sensors, photodetectors, optoelectronic devices, and photocatalysts.

}, issn = {1466-8033}, doi = {10.1039/c4ce01738b}, author = {Warule, Sambhaji S. and Chaudhari, Nilima S. and Shisode, Raju T. and Desa, Keith V. and Kale, Bharat B. and More, Mahendra A.} } @article { ISI:000353097100022, title = {Facile biological approach for immobilization, physicochemical characterization and antibacterial activity of noble metals nanocomposites}, journal = {Materials Letters}, volume = {148}, year = {2015}, month = {JUN}, pages = {86-90}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The use of biopolymer as template to regulate metallic nanoparticles is promising field in green nanotechnology. We have designed a facile biological way for rapid synthesis and immobilization of gold and silver nanoparticles on alginate films using leaf extract of Cassia auriculata. The prepared gold bio-nanocomposite (Au-BNC) and silver bio-nanocomposite (Ag-BNC) were characterized by UV-vis spectroscopy, Fourier transform infrared spectroscopy, Transmission electron microscopy and Thermal analysis. The bio-nanocomposites exhibited good antibacterial activity against both gram positive (Bacillus subtilis) and gram negative (Escherichia coli) bacteria. The metal nanoparticle embedded films have number of applications in catalysis, optical biosensors, electronic, biomedical devices and environmental remediation. (C) 2015 Elsevier B.V. All rights reserved.

}, keywords = {Alginate, Antibacterial, Bio-nanocomposites, Cassia auriculata, Characterization, Nanoparticles}, issn = {0167-577X}, doi = {10.1016/j.matlet.2015.02.059}, author = {Parveen, Asra and Ali, Tayyab and Wahid, Malik and Rao, Srinath} } @article { ISI:000345901600070, title = {Fe(III) phytate metallogel as a prototype anhydrous, intermediate temperature proton conductor}, journal = {Chemical Science}, volume = {6}, number = {1}, year = {2015}, month = {OCT}, pages = {603-607}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A proton conducting metallogel [FNPA; ferric nitrate (FN)-phytic acid (PA)] is synthesized by immobilizing a protogenic ligand (phytic acid) using iron(III) nitrate in DMF. The xerogel shows high proton conductivity of 2.4 x 10(-2) S cm(-1) at 120 degrees C, the best value known among all metal organic materials (MOMs). Marking the first such attempt in MOMs, an electrode made using the xerogel showed a power density of 0.94 mW cm(-2) at 0.6 V under dry fuel cell conditions.

}, issn = {2041-6520}, doi = {10.1039/c4sc02294g}, author = {Aiyappa, Harshitha Barike and Saha, Subhadeep and Wadge, Pritish and Banerjee, Rahul and Kurungot, Sreekumar} } @article { ISI:000354964900096, title = {Freezing tendency towards 4-coordinated amorphous networks causes an increase in the heat capacity of supercooled Stillinger-Weber silicon}, journal = {RSC Advances}, volume = {5}, number = {55}, year = {2015}, month = {MAY}, pages = {44679-44686}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Supercooled liquid silicon (Si), modeled by the Stillinger-Weber (SW) potential, has been shown to undergo transition to low density amorphous phases at 1060 K in previous studies. Furthermore, the constant pressure heat capacity C-p has been found to exhibit a large increase as the liquid is cooled to 1060 K. In this work, we examine the nature of the equilibrium and the relaxation process of supercooled SW Si in the temperature range of 1060 K to 1070 K at zero pressure. We find that the relaxation of the supercooled liquid leads to a sharp irreversible decrease in the fluctuation of the two body energy of the largest connected network of 4-coordinated particles. Such a process implies a tightening of the bonds (i.e. freezing or jamming) of the network, and is accompanied by a sharp increase in the fraction of the 4-coordinated particles in the system. We find that the jamming (or freezing) process shows a sudden acceleration across a dynamical instability point that occurs at a unique potential energy state of the network. Further, we find that the occurrence of the dynamical instability is associated with the appearance of a straight line region in the cumulative potential energy distributions with a configurational temperature close to 1060 K. We conclude that the supercooled liquid state must be regarded as a constrained equilibrium state, since the accessible microstates are constrained by the inherent tendency of the system to approach the dynamical instability point. Thus all properties of supercooled liquid SW-Si, including the rise in C-p at 1060 K, can be attributed to the freezing tendency of the 4-coordinated particle network.

}, issn = {2046-2069}, doi = {10.1039/c5ra04892c}, author = {Apte, Pankaj A. and Pingua, Nandlal and Gautam, Arvind Kumar and Kumar, Uday and Willow, Soohaeng Yoo and Zeng, Xiao Cheng and Kulkarni, B. D.} } @article { ISI:000350222400077, title = {From micron to nano-curcumin by sophorolipid co-processing: highly enhanced bioavailability, fluorescence, and anti-cancer efficacy (vol 4, pg 60334, 2014)}, journal = {RSC Advances}, volume = {5}, number = {28}, year = {2015}, month = {FEB}, pages = {22075}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, issn = {2046-2069}, doi = {10.1039/c5ra90018b}, author = {Singh, Pradeep Kumar and Wani, Kirtee and Kaul-Ghanekar, Ruchika and Prabhune, Asmita and Ogale, Satishchandra} } @article { ISI:000365525900102, title = {High performance single crystalline PbWO4 nanorod field effect transistor}, journal = {Journal of Materials Science-Materials in Electronics}, volume = {26}, number = {12, SI}, year = {2015}, month = {DEC}, pages = {10044-10048}, publisher = {SPRINGER}, address = {VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS}, abstract = {

The highly crystalline PbWO4 nanorods were synthesized using simple co-precipitation method which has application in field effect transistor. The synthesized PbWO4 nanorods were characterized by XRD, Raman spectroscopy, TEM and HRTEM indicating highly crystalline nature. Field effect transistor was fabricated on pre-patterned 300 nm SiO2/Si substrates using photolithography technique with channel length 1 A mu m and width 20 A mu m. Thin film (similar to 100 nm) was made up of PbWO4 nanorods by spin coating on the pre-patterned device used as channel layer. The field effect mobility was observed to be 4.7 cm(2) V-1 s(-1) and I-ON/OFF ratio similar to 10(3) which is far better than the organic molecules due to single crystalline nature and rod like morphology of the PbWO4 providing direct path for charges to transport towards channel.

}, issn = {0957-4522}, doi = {10.1007/s10854-015-3685-9}, author = {Walke, Pravin S. and Patil, Vandana B. and Mulla, Imtiaz S. and Late, Dattatray J.} } @article {42996, title = {High surface area porous carbon for ultracapacitor application by pyrolysis of polystyrene containing pendant carboxylic acid groups prepared via click chemistry}, journal = {Materials Today Communications}, volume = {4}, year = {2015}, month = {SEP}, pages = {166-175}, doi = {10.1016/j.mtcomm.2015.07.002}, author = {Chhatre, Shraddha and Aravindan, Vanchiappan and Puthusseri, Dhanya and Banerjee, Abhik and Madhavi, Srinivasan and Wadgaonkar, Prakash P. and Ogale, Satishchandra B.} } @article { ISI:000354578900029, title = {High-throughput simulations of dimer and trimer assembly of membrane proteins. the DAFT approach}, journal = {Journal of Chemical Theory and Computation}, volume = {11}, number = {5}, year = {2015}, month = {MAY}, pages = {2278-2291}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Interactions between membrane proteins are of great biological significance and are consequently an important target for pharmacological intervention. Unfortunately, it is still difficult to obtain detailed views on such interactions, both experimentally, where the environment hampers atomic resolution investigation, and computationally, where the time and length scales are problematic. Coarse grain simulations have alleviated the later issue, but the slow movement through the bilayer, coupled to the long life times of nonoptimal dimers, still stands in the way of characterizing binding distributions. In this work, we present DAFT, a Docking Assay For Transmembrane components, developed to identify preferred binding orientations. The method builds on a program developed recently for generating custom membranes, called insane (INSert membrANE). The key feature of DAFT is the setup of starting structures, for which optimal periodic boundary conditions are devised. The purpose of DAFT is to perform a large number of simulations with different components, starting from unbiased noninteracting initial states, such that the simulations evolve collectively, in a manner reflecting the underlying energy landscape of interaction. The implementation and characteristic features of DAFT are explained, and the efficacy and relaxation properties of the method are explored for oligomerization of glycophorin A dimers, polyleucine dimers and trimers, MS1 trimers, and rhodopsin dimers. The results suggest that, for simple helices, such as GpA and polyleucine, in POPC/DOPC membranes series of 500 simulations of 500 ns each allow characterization of the helix dimer orientations and allow comparing associating and nonassociating components. However, the results also demonstrate that short simulations may suffer significantly from nonconvergence of the ensemble and that using too few simulations may obscure or distort features of the interaction distribution. For trimers, simulation times exceeding several microseconds appear needed, due to the increased complexity. Similarly, characterization of larger proteins, such as rhodopsin, takes longer time scales due to the slower diffusion and the increased complexity of binding interfaces. DAFT and its auxiliary programs have been made available from http://cgmartini.nl/, together with a working example.

}, issn = {1549-9618}, doi = {10.1021/ct5010092}, author = {Wassenaar, Tsjerk A. and Pluhackova, Kristyna and Moussatova, Anastassiia and Sengupta, Durba and Marrink, Siewert-Jan and Tieleman, D. Peter and Boeckmann, Rainer A.} } @article { ISI:000362849600271, title = {Landscapes of membrane protein interactions from high-throughput MD simulations using the daft approach}, journal = {Biophysical Journal}, volume = {108}, number = {2, 1}, year = {2015}, note = {59th Annual Meeting of the Biophysical-Society, Baltimore, MD, FEB 07-11, 2015}, month = {JAN}, pages = {526A-526A}, publisher = {Biophys Soc}, address = {600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA}, issn = {0006-3495}, author = {Wassenaar, Tsjerk A. and Pluhackova, Kristyna and Moussatova, Anastassiia and Sengupta, Durba and Marrink, Siewert-Jan and Tieleman, D. Peter and Boeckmann, Rainer A.} } @article { ISI:000362308600004, title = {Lannea coromandelica attenuates glucagon and oxyntomodulin mediated cAMP formation in HEK cells stably-expressing human glucagon receptor}, journal = {Journal of Herbal Medicine}, volume = {5}, number = {3}, year = {2015}, month = {SEP}, pages = {153-157}, publisher = {ELSEVIER GMBH, URBAN \& FISCHER VERLAG}, address = {OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY}, abstract = {

Antagonism of glucagon is a potential therapeutic approach for Type 2 diabetes mellitus (T2DM). The bark extract of Lannea coromandelica has been reported to have hypoglycemic or anti-diabetic effects on animal models and human subjects. The aim of this study was to elucidate the molecular mechanisms of L. coromandelica extract as a glucagon receptor antagonist. The aqueous extract of L. coromandelica bark attenuated glucagon-mediated cAMP formation in a concentration dependent manner with an IC50 value of 4.24 +/- 1.31 mu g/ml. It shifted a concentration response curve of glucagon towards the right with a 4, 21 and 40-fold change in IC50 at 6.25, 12.5 and 25 mu g/ml of extract, respectively. Additionally, it attenuated an oxyntomodulin-mediated cAMP response. The extract was found specifically to inhibit glucagon mediated cAMP formation since it was ineffective in reducing cAMP levels nonspecifically-elevated by forskolin. The data support that the aqueous extract of L. coromandelica antagonizes the glucagon receptor and has the potential to reduce glucagon mediated liver glucose output. (C) 2015 Elsevier GmbH. All rights reserved.

}, keywords = {cAMP, Diabetes, Glucagon, Lannea coromandelica, Mechanism, Oxyntomodulin}, issn = {2210-8033}, doi = {10.1016/j.hermed.2015.06.005}, author = {Walunj, Sameer and Gupta, Rajesh and Joshi, Swati P. and Sabharwal, Sushma G. and Joshi, Kalpana} } @article { ISI:000368224600009, title = {Lithium-assisted proton conduction at 150 degrees C in a microporous triazine-phenol polymer}, journal = {Advanced Materials Interfaces}, volume = {2}, number = {16}, year = {2015}, month = {NOV}, pages = {1500301}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, keywords = {conduction, hydrophobic polar frameworks, lithiated polymers, proton conduction, triazine-phenol polymers}, issn = {2196-7350}, doi = {10.1002/admi.201500301}, author = {Nandi, Shyamapada and Dhavale, Vishal M. and Shalini, Sorout and Werner-Zwanziger, Ulrike and Singh, Harpreet and Kurungot, Sreekumar and Vaidhyanathan, Ramanathan} } @article { ISI:000349401200012, title = {New atom transfer radical polymerization initiator based on phenolphthalein for the synthesis of bis-allyloxy functionalized polystyrene macromonomers}, journal = {Polymer International}, volume = {64}, number = {3}, year = {2015}, month = {MAR}, pages = {413-420}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

A new atom transfer radical polymerization (ATRP) initiator, namely 2-(1,1-bis(4-(allyloxy)phenyl)-3-oxoisoindolin-2-yl)ethyl 2-bromo-2-methylpropanoate, was synthesized starting from phenolphthalein, a commercially available and an inexpensive chemical. Well- defined bis-allyloxy functionalized polystyrene macromonomers (M-n,M-GPC 4800-11 700gmol(-1)) with controlled molecular weight and narrow molecular weight distribution (1.05-1.09) were synthesized using ATRP by varying the monomer to initiator feed ratio. The presence of allyloxy functionality on polystyrene was confirmed by Fourier transform infrared and H-1 NMR spectroscopy. A kinetic study of polymerization revealed pseudo-first-order kinetics with respect to monomer consumption. Initiator efficiency was found to be in the range 0.80-0.95. Matrix-assisted laser desorption ionization time of flight spectra showed a narrow molecular weight distribution with control over the molecular weight. The reactivity of the allyloxy groups on polystyrene was successfully demonstrated by quantitative photochemical thiol-ene click reaction with benzyl mercaptan as the model thiol reagent. Furthermore, the thiol-ene click reaction was exploited to introduce other reactive functional groups such as hydroxyl and carboxyl by reaction of ,-bis-allyloxy functionalized polystyrene with 2-mercaptoethanol and 3-mercaptopropionic acid, respectively. (c) 2014 Society of Chemical Industry

}, keywords = {atom transfer radical polymerization, bis-allyloxy functionalized polystyrene, functional initiator, phenolphthalein, thiol-ene click reaction}, issn = {0959-8103}, doi = {10.1002/pi.4804}, author = {Patil, Sachin S. and Menon, Shamal K. and Wadgaonkar, Prakash P.} } @article { ISI:000361532500003, title = {New butenolide cinnamate and other biological active chemical constituents from Polygonum glabrum}, journal = {Natural Product Research}, volume = {29}, number = {22}, year = {2015}, month = {NOV}, pages = {2080-2086}, publisher = {TAYLOR \& FRANCIS LTD}, address = {4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND}, abstract = {

Phytochemical investigation of the methanol extract of the aerial parts of Polygonum glabrum afforded one new natural product (-)-2-methoxy-2-butenolide-3-cinnamate (1) along with six known compounds, -hydroxyfriedalanol (2), 3-hydroxy-5-methoxystilbene (3), (-) pinocembrin (4), sitosterol-(6-O-palmitoyl)-3-O{\textendash}d-glucopyranoside (5), (-) pinocembrin-5-methyl ether (6) and sitosterol-3-O{\textendash}d-glucopyranoside (7). Compound 1 showed promising in vitro anti-HIV-1 activity against primary isolates HIV-1(UG070) (X4, subtype D) and HIV-1(VB59) (R5, subtype C) assayed using TZM-bl cell line with IC50 in the range of 15.68-22.43g/mL. The extract showed TI in the range of 19.19-27.37 with IC50 in the range of 10.90-15.55g/mL. Compounds 1, 3 and 4 exhibited in vitro anti-mycobacterium activity against Mycobacterium tuberculosis H37Ra with IC50 values of 1.43, 3.33 and 1.11g/mL in dormant phase and 2.27, 3.33 and 1.21g/mL in active phase, respectively. Compound 4 was found to be the most active antiproliferative with IC50 values of 1.88-11.00g/mL against THP-1, A549, Panc-1, HeLa and MCF7 cell lines.

}, keywords = {anti-HIV-1, anti-mycobacterium, antiproliferative, phytochemicals, Polygonaceae, Polygonum glabrum}, issn = {1478-6419}, doi = {10.1080/14786419.2015.1004674}, author = {Said, Madhukar S. and Chinchansure, Ashish A. and Nawale, Laxman and Durge, Ankita and Wadhwani, Ashish and Kulkarni, Smita S. and Sarkar, Dhiman and Joshi, Swati P.} } @article { ISI:000362603800044, title = {New poly(ether urethane)s based on lignin derived aromatic chemicals via A-B monomer approach: synthesis and characterization}, journal = {European Polymer Journal}, volume = {71}, year = {2015}, month = {OCT}, pages = {547-557}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

{omega-Hydroxyalkyleneoxy benzoyl azides were synthesized starting from lignin-derived phenolic acids (vanillic acid and syringic acid) and omega-haloalkanols (6-chlorohexanol and 11-bromoundecanol). These bio-derived A-B monomers were self-polycondensed to afford poly(ether urethane)s which exhibited reasonably high molecular weights (eta(inh) = 0.41-0.69 dL g(-1), and M-n

}, keywords = {A-B type monomer, Poly(ether urethane)s, Renewable resources, Self-polycondensation}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2015.08.021}, author = {Kuhire, Sachin S. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article {45933, title = {Polybenzimidazole-based polymeric ionic liquids (PILs): effects of {\textquoteleft}substitution asymmetry{\textquoteright} on CO2 permeation properties}, journal = {Journal of Membrane Science}, volume = {493}, year = {2015}, month = {NOV }, pages = {403-413}, type = {Article}, abstract = {

Polymeric Ionic Liquids (PILs) are being considered as promising membrane materials for CO2 separation. Present work aims at investigating effects substitution asymmetry on imidazole moiety of two structurally different polybenzimidazoles (PBI-BuI and PBI-HFA) on physical, gas sorption and transport properties of the resulting film forming PILs possessing symmetric substitution, while keeping one of the N-substituent as methyl group. PILs were obtained with high degree of substitution. The halide anion of these PILs was exchanged with BF4-, Tf-2(N) over bar and HF (B) over bar anions. Effects of substituents, cationic backbone and type of anions on gas permeation properties of PILs using pure gases (He, H-2, N-2 and CO2) were examined at 20 atm upstream pressure and correlated with their physical properties. Combination of typical ionic liquid character (effective towards enhancing CO2 sorption) and looser chain packing (ease in gas diffusion) offered improved CO2 permeation characteristics. As an outcome, some of the PILs exhibited higher CO2 permeation than that of hydrogen, typically known as {\textquoteleft}reverse selectivity{\textquoteright}. These asymmetrically substituted PILs enhanced not only the gas permeability, but also selectivity than their symmetrically substituted counterparts. (C) 2015 Elsevier B.V. All rights reserved.

}, issn = {0376-7388}, doi = {10.1016/j.memsci.2015.07.020}, author = {Shaligram, Sayali V. and Wadgaonkar, Prakash P. and Kharul, Ulhas K.} } @article { ISI:000351556100059, title = {Polyelectrolytes in dilute solution: viscometric access to coil dimensions and salt effects}, journal = {RSC Advances}, volume = {5}, number = {35}, year = {2015}, month = {MAR}, pages = {27674-27681}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Copolymers of acrylamide (AM) and diallyldimethylammonium chloride (DADMAC), differing in molar masses M (52.3 to 227 kDa) and degrees of charging y (0.2 to 0.6), were studied with respect to their viscometric behavior in dilute aqueous solutions containing variable amounts of NaCl. Complementary measurements were performed on a Brookhaven 90 plus particle size analyzer. M dominates the intrinsic viscosities [eta]. For the viscometric interaction parameters B this is only true for large concentrations of extra salt. [eta] and B as a function of solvent salinity follow Boltzmann laws. Coil dimensions, determined either via dynamic light scattering or viscometry, agree well. For low salt contents of the solvent the radii decrease with rising polymer concentration, whereas they increase for high salt concentrations; at a characteristic salinity of the solvent they become independent. Zeta potentials grow from +20 to +40 mV as y goes up.

}, issn = {2046-2069}, doi = {10.1039/c5ra01376c}, author = {Suresha, P. R. and Badiger, Manohar V. and Wolf, Bernhard A.} } @article {45926, title = {Potential applications of glucosyltransferases in terpene glucoside production: impacts on the use of aroma and fragrance}, journal = {Applied Microbiology and Biotechnology}, volume = {99}, year = {2015}, month = {JAN}, pages = {165-174}, type = {Article}, abstract = {

The detection of glucoconjugated forms of monoterpene alcohols in rose petals in the late 1960s opened the new field of nonvolatile aroma precursors in flavor research. It is now well established that odorless glycosides represent a significant pool of aroma precursors in plants where they act as preformed but inactivated defense or attractive chemicals. Technical improvements in the separation and identification of plant secondary metabolites have provided a multitude of chemical structures, but functional characterization of glycosyltransferases that catalyze their formation lags behind. As technical efforts and costs for DNA sequencing dramatically dropped during the last decade, the number of plant genome sequences increased significantly, thus providing opportunities to functionally characterize the glycosyltransferase gene families in plants. These studies yielded the first glycosyltransferase genes that encode efficient biocatalysts for the production of monoterpene glucosides. They have applications in the food, feed, chemical, cosmetic, and pharmaceutical industries as slow release aroma chemicals.

}, issn = {0175-7598}, doi = {10.1007/s00253-014-6229-y}, author = {Schwab, Wilfried and Fischer, Thilo C. and Giri, Ashok and Wuest, Matthias} } @article { ISI:000362436800013, title = {Pt-nanoparticle functionalized carbon nano-onions for ultra-high energy supercapacitors and enhanced field emission behaviour}, journal = {RSC Advances}, volume = {5}, number = {99}, year = {2015}, month = {SEP}, pages = {80990-80997}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

In the present work, we have investigated the charge storage capacitive response and field emission behaviour of platinum (Pt) nanoparticles decorated on carbon nano onions (CNOs) and compared them with those of pristine carbon nano onions. The specific capacitance observed for Pt-CNOs is 342.5 F g(-1), about six times higher than that of pristine CNOs, at a scan rate of 100 mV s(-1). The decoration with Pt nanoparticles, without any binder or polymer separator on the CNO, leading to enhanced supercapacitance is due to easy accessibility of Na2SO4 electrolyte in the active material. The Density Functional Theory (DFT) calculations of these systems reveal enhancement in the Density of States (DOS) near the Fermi energy (E-F) on account of platinum decoration on the CNOs. Furthermore, the field emission current density of similar to 0.63 mA cm(-2) has been achieved from the Pt-CNOs emitter at an applied electric field of similar to 4.5 V mu m(-1) and from the pristine CNOs sample current density of similar to 0.4 mA cm(-2) has been achieved at an applied electric field of similar to 6.6 V mu m(-1). The observed enhanced field emission behavior has been attributed to the improved electrical conductivity and increased emitting sites of the Pt-CNO emitter. The field emission current stability of the Pt-CNO emitter over a longer duration is found to be good. The observed results imply multifunctional potential of Pt-CNOs, as supercapacitor material in various next generation hybrid energy storage devices, and field emitters for next generation vacuum nano/microelectronic devices.

}, issn = {2046-2069}, doi = {10.1039/c5ra12364j}, author = {Suryawanshi, Sachin R. and Kaware, Vaibhav and Chakravarty, Disha and Walke, Pravin S. and More, Mahendra A. and Joshi, Kavita and Rout, Chandra Sekhar and Late, Dattatray J.} } @article { ISI:000352508300032, title = {Reactivity and operational stability of N-Tailed TAMLs through kinetic studies of the catalyzed oxidation of orange II by H2O2: synthesis and x-ray structure of an N-Phenyl TAML}, journal = {Chemistry A-European Journal}, volume = {21}, number = {16}, year = {2015}, month = {APR}, pages = {6226-6233}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

{The catalytic activity of the N-tailed (biuret) TAML (tetraamido macrocyclic ligand) activators [Fe{4-XC6H3-1,2-(NCOCMe2NCO)(2)NR}Cl](2-) (3; N atoms in boldface are coordinated to the central iron atom; the same nomenclature is used in for compounds 1 and 2 below), [X

}, keywords = {Hydrogen peroxide, iron, kinetics, Oxidation, reaction mechanisms}, issn = {0947-6539}, doi = {10.1002/chem.201406061}, author = {Warner, Genoa R. and Mills, Matthew R. and Enslin, Clarissa and Pattanayak, Shantanu and Panda, Chakadola and Panda, Tamas Kumar and Sen Gupta, Sayam and Ryabov, Alexander D. and Collins, Terrence J.} } @article { ISI:000351061700025, title = {Situ preparation of N-TiO2/graphene nanocomposite and its enhanced photocatalytic hydrogen production by H2S splitting under solar light}, journal = {Nanoscale}, volume = {7}, number = {11}, year = {2015}, month = {FEB}, pages = {5023-5034}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Highly monodispersed nitrogen doped TiO2 nanoparticles were successfully deposited on graphene (N-TiO2/Gr) by a facile in-situ wet chemical method for the first time. N-TiO2/Gr has been further used for photocatalytic hydrogen production using a naturally occurring abundant source of energy i.e. solar light. The N-TiO2/Gr nanocomposite composition was optimized by varying the concentrations of dopant nitrogen and graphene (using various concentrations of graphene) for utmost hydrogen production. The structural, optical and morphological aspects of nanocomposites were studied using XRD, UV-DRS, Raman, XPS, FESEM, and TEM. The structural study of the nanocomposite shows existence of anatase N-TiO2. Further, the details of the components present in the composition were confirmed with Raman and XPS. The morphological study shows that very tiny, 7-10 nm sized, N-TiO2 nanoparticles are deposited on the graphene sheet. The optical study reveals a drastic change in absorption edge and consequent total absorption due to nitrogen doping and presence of graphene. Considering the extended absorption edge to the visible region, these nanocomposites were further used as a photocatalyst to transform hazardous H2S waste into eco-friendly hydrogen using solar light. The N-TiO2/Gr nanocomposite with 2\% graphene exhibits enhanced photocatalytic stable hydrogen production i.e. similar to 5941 mu mol h(-1) under solar light irradiation using just 0.2 gm nanocomposite, which is much higher as compared to P25, undoped TiO2 and TiO2/Gr nanocomposite. The enhancement in the photocatalytic activity is attributed to {\textquoteleft}N{\textquoteright} doping as well as high specific surface area and charge carrier ability of graphene. The recycling of the photocatalyst shows a good stability of the nanocomposites. This work may provide new insights to design other semiconductor deposited graphene novel nanocomposites as a visible light active photocatalyst.

}, issn = {2040-3364}, doi = {10.1039/c4nr06435f}, author = {Bhirud, Ashwini P. and Sathaye, Shivaram D. and Waichal, Rupali P. and Ambekar, Jalindar D. and Park, Chan-J. and Kale, Bharat B.} } @article { ISI:000359459900017, title = {Situ preparation of N-ZnO/graphene nanocomposites: excellent candidate as a photocatalyst for enhanced solar hydrogen generation and high performance supercapacitor electrode}, journal = {Journal of Materials Chemistry A}, volume = {3}, number = {33}, year = {2015}, month = {JUL}, pages = {17050-17063}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

We have demonstrated a facile in situ wet chemical method to synthesize nanostructured nitrogen doped ZnO/Graphene (N-ZnO/GR) nanocomposites for the first time. Nitrogen doped ZnO over graphene (N-ZnO/GR) was studied using various concentrations of graphene. During the synthesis of N-ZnO/GR nanocomposites, in situ formation of graphene via GO reduction and formation of 4-9 nm N-ZnO have been demonstrated. The composite N-ZnO/GR absorbs in the visible region and this property is used for the photocatalytic reaction to transform hazardous H2S waste into eco-friendly hydrogen using solar light. The N-ZnO/GR nanocomposite with 0.3\% graphene exhibits an enhanced photocatalytic stable hydrogen production rate i.e. similar to 5072 mu mol h(-1) under visible light irradiation. It is noteworthy that the N-ZnO/GR electrode exhibits a high specific capacitance of 555 F g(-1) and excellent cyclic performance with nearly 96.20\% capacity retention after 2000 cycles at a current density of 10 A g(-1). These results indicate great potential applications of N-ZnO/GR in developing high hydrogen production and supercapacitors with high energy and power densities.

}, issn = {2050-7488}, doi = {10.1039/c5ta03955j}, author = {Bhirud, Ashwini P. and Sathaye, Shivaram and Waichal, Rupali and Park, Chan-Jin and Kale, Bharat} } @article { ISI:000363727100011, title = {Structure mediation in substrate binding and post-translational processing of penicillin acylases: Information from mutant structures of Kluyvera citrophila penicillin G acylase}, journal = {Protein Science}, volume = {24}, number = {10}, year = {2015}, month = {OCT}, pages = {1660-1670}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Penicillin acylases are industrially important enzymes for the production of 6-APA, which is used extensively in the synthesis of secondary antibiotics. The enzyme translates into an inactive single chain precursor that subsequently gets processed by the removal of a spacer peptide connecting the chains of the mature active heterodimer. We have cloned the penicillin G acylase from Kluyvera citrophila (KcPGA) and prepared two mutants by site-directed mutagenesis. Replacement of N-terminal serine of the beta-subunit with cysteine (Ser beta 1Cys) resulted in a fully processed but inactive enzyme. The second mutant in which this serine is replaced by glycine (Ser beta 1Gly) remained in the unprocessed and inactive form. The crystals of both mutants belonged to space group P1 with four molecules in the asymmetric unit. The three-dimensional structures of these mutants were refined at resolutions 2.8 and 2.5 angstrom, respectively. Comparison of these structures with similar structures of Escherichia coli PGA (EcPGA) revealed various conformational changes that lead to autocatalytic processing and consequent removal of the spacer peptide. The large displacements of residues such as Arg168 and Arg477 toward the N-terminal cleavage site of the spacer peptide or the conformational changes of Arg145 and Phe146 near the active site in these structures suggested probable steps in the processing dynamics. A comparison between the structures of the processed Serb1Cys mutant and that of the processed form of EcPGA showed conformational differences in residues Arg alpha 145, Phe alpha 146, and Phe beta 24 at the substrate binding pocket. Three conformational transitions of Arg alpha 145 and Phe alpha 146 residues were seen when processed and unprocessed forms of KcPGA were compared with the substrate bound structure of EcPGA. Structure mediation in activity difference between KcPGA and EcPGA toward acyl homoserine lactone (AHL) is elucidated.

}, keywords = {acyl homoserine lactone, autocatalytic processing, conformational changes, KcPGA_Ser beta 1Cys, KcPGA_Ser beta 1Gly, Ntn hydrolase}, issn = {0961-8368}, doi = {10.1002/pro.2761}, author = {Chand, Deepak and Varshney, NishantKumar and Ramasamy, Sureshkumar and Panigrahi, Priyabrata and Brannigan, James A. and Wilkinson, Anthony J. and Suresh, C. G.} } @article { ISI:000346263800042, title = {Synthesis and characterization of PEPO grafted carboxymethyl guar and carboxymethyl tamarind as new thermo-associating polymers}, journal = {Carbohydrate Polymers}, volume = {117}, year = {2015}, month = {MAR}, pages = {331-338}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

New thermo associating polymers were designed and synthesized by grafting amino terminated poly(ethylene oxide-co-propylene oxide) (PEPO) onto carboxymethyl guar (CMG) and carboxymethyl tamarind (CMT). The grafting was performed by coupling reaction between-NH2 groups of PEPO and -COOH groups of CMG and CMT using water-soluble EDC/NHS as coupling agents. The grafting efficiency and the temperature of thermo-association, T-assoc in the copolymer were studied by NMR spectroscopy. The graft copolymers, CMG-g-PEPO and CMT-g-PEPO exhibited interesting thermo-associating behavior which was evidenced by the detailed rheological and fluorescence measurements. The visco-elastic properties (storage modulus, G{\textquoteright}; loss modulus, G{\textquoteright}{\textquoteright}) of the copolymer solutions were investigated using oscillatory shear experiments. The influence of salt and surfactant on the T-assoc was also studied by rheology, where the phenomenon of {\textquoteleft}{\textquoteleft}Salting out{\textquoteright}{\textquoteright} and {\textquoteleft}{\textquoteleft}Salting in{\textquoteright}{\textquoteright} was observed for salt and surfactant, respectively, which can give an easy access to tunable properties of these copolymers. These thermo-associating polymers with biodegradable nature of CMG and CMT can have potential applications as smart injectables in controlled release technology and as thickeners in cosmetics and pharmaceutical formulations. (C) 2014 Elsevier Ltd. All rights reserved.

}, keywords = {Carboxymethyl guar, Carboxymethyl tamarind, Pluronics, Rheology, Solution behavior, Thermo-associating polymers}, issn = {0144-8617}, doi = {10.1016/j.carbpol.2014.09.073}, author = {Gupta, Nivika R. and Torris, Arun A. T. and Wadgaonkar, Prakash P. and Rajamohanan, P. R. and Ducouret, Guylaine and Hourdet, Dominique and Creton, Costantino and Badiger, Manohar V.} } @article { ISI:000363466600014, title = {Synthesis and characterization of polyetherimides containing multiple ether linkages and pendent pentadecyl chains}, journal = {Polymer International}, volume = {64}, number = {12}, year = {2015}, month = {DEC}, pages = {1770-1778}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

4-(4-(4-(4-Aminophenoxy)-2-pentadecylphenoxy)phenoxy)aniline (APPPA) was synthesized starting from cashew nut shell liquid-derived bisphenol, i.e. 4-(4-hydroxyphenoxy)-3-pentadecylphenol, by nucleophilic substitution reaction with 4-chloronitrobenzene followed by reduction of the formed 4-(4-nitrophenoxy)-1-(4-(4-nitrophenoxy)phenoxy)-2-pentadecylbenzene. Three new polyetherimides containing multiple ether linkages and pendent pentadecyl chains were synthesized by one-step high-temperature solution polycondensation of APPPA in m-cresol with three aromatic dianhydrides, i.e. 3,3,4,4-oxydiphthalic anhydride, 4,4-(hexafluoroisopropylidene)diphthalic anhydride and 3,3,4,4-biphenyltetracarboxylic dianhydride. Inherent viscosities and number-average molecular weights of the polyetherimides were in the ranges 0.66-0.70 dLg(-1) and 17100-29700gmol(-1) (gel permeation chromatography, polystyrene standards), respectively, indicating the formation of reasonably high molecular weight polymers. The polyetherimides were soluble in organic solvents such as chloroform, dichloromethane, tetrahydrofuran, pyridine, m-cresol, N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone and dimethylsulfoxide, and could be cast into transparent, flexible and tough films from their solutions in chloroform. The polyetherimides exhibited glass transition temperatures (T-g) in the range 113-131 degrees C. The lowering of T-g could be attributed to the combined influence of flexibilizing ether linkages and pentadecyl chains which act as packing-disruptive{\textquoteright} groups. The temperature at 10\% weight loss (T-10), determined from thermogravimetric analysis in nitrogen atmosphere, was in the range 460-470 degrees C demonstrating good thermal stability. The virtues of solubility and large gap between T-g and T-10 mean that the polyetherimides containing pendent pentadecyl chains have possibilities for both solution as well as melt processability. (c) 2015 Society of Chemical Industry

}, keywords = {CNSL, ether linkage, pentadecyl, polyetherimide, processability}, issn = {0959-8103}, doi = {10.1002/pi.4978}, author = {Tawade, Bhausaheb V. and Kulkarni, Arun D. and Wadgaonkar, Prakash P.} } @article { ISI:000362437900092, title = {Targeting a chemorefractory COLO205 (BRAF V600E) cell line using substituted benzo[alpha]phenoxazines}, journal = {RSC Advances}, volume = {5}, number = {100}, year = {2015}, month = {SEP}, pages = {82549-82563}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Mutational activations of the oncogene BRAF (especially BRAF V600E) result in a poor prognosis for colon cancer patients and are associated with chemoresistance rendering them refractory to treatment. The development of novel bioactive compounds with specific targeting abilities under such conditions is an urgent need in drug discovery. In this report we synthesize and characterize three fluorescent benzo[alpha]phenoxazine compounds (10R-benzo[alpha]phenoxazine-5-one, 1B; R = Cl, 2B; R = CH3, 3B; R = H) and their anticancer activities are evaluated in a COLO205 cell line. All three compounds with a log P value around 2 were cell permeable. However, 2B and 3B showed specific cytotoxicity in a malignant COLO205 cell line with a BRAF mutation (V600E) in comparison to a non-malignant wild-type BRAF HEK293T cell line. From further cell-based assays (cell cycle analysis, DNA fragmentation and caspase activation), we conclude that 2B and 3B treatment-induced selective cell death by inducing cell cycle arrest at the G0/G1 phase and caspase-mediated apoptosis (activation of the intrinsic and extrinsic pathways) are present only in BRAF V600E COLO205 cells. Further studies in the drug discovery pipeline might help develop these benzo[alpha]phenoxazines as promising chemotherapeutics for such refractory mutated cancers.

}, issn = {2046-2069}, doi = {10.1039/c5ra14949e}, author = {Pal, Sanjima and Konkimalla, V. Badireenath and Kathawate, Laxmi and Rao, Soniya S. and Gejji, Shridhar P. and Puranik, Vedavati G. and Weyhermueller, Thomas and Salunke-Gawali, Sunita} } @article { ISI:000346236000077, title = {Thermodynamic and kinetic characterization of transmembrane helix association}, journal = {Physical Chemistry Chemical Physics}, volume = {17}, number = {2}, year = {2015}, month = {NOV}, pages = {1390-1398}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

The transient dimerization of transmembrane proteins is an important event in several cellular processes and computational methods are being increasingly used to quantify their underlying energetics. Here, we probe the thermodynamics and kinetics of a simple transmembrane dimer to understand membrane protein association. A multi-step framework has been developed in which the dimerization profiles are calculated from coarse-grain molecular dynamics simulations, followed by meso-scale simulations using parameters calculated from the coarse-grain model. The calculated value of Delta G(assoc) is approx. -20 kJ mol(-1) and is consistent between three methods. Interestingly, the meso-scale stochastic model reveals low dimer percentages at physiologically-relevant concentrations, despite a favorable Delta G(assoc). We identify generic driving forces arising from the protein backbone and lipid bilayer and complementary factors, such as protein density, that govern self-interactions in membranes. Our results provide an important contribution in understanding membrane protein organization and linking molecular, nano-scale computational studies to meso-scale experimental data.

}, issn = {1463-9076}, doi = {10.1039/c4cp03732d}, author = {Pawar, Aiswarya B. and Deshpande, Sneha A. and Gopal, Srinivasa M. and Wassenaar, Tsjerk A. and Athale, Chaitanya A. and Sengupta, Durba} } @article { ISI:000354211100055, title = {Tolbutamide induces conformational change and promotes albumin glycation}, journal = {RSC Advances}, volume = {5}, number = {50}, year = {2015}, month = {APR}, pages = {40070-40075}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Tolbutamide is a first generation sulfonylurea drug used for the treatment of type II diabetes. In the present study, the effect of tolbutamide on albumin conformation was investigated using BSA as a model protein. The binding of tolbutamide induced a conformational change in albumin, which was confirmed by thioflavin T assay, ANS assay, and CD spectroscopy. Computer simulations suggested that the binding of tolbutamide increases the solvent accessibility of lysine residues, the hotspots of glycation. Furthermore, the change in conformation of albumin facilitates increased glycation, which was observed by AGE specific fluorescence and the results were corroborated by mass spectrometric analysis. This study suggested that tolbutamide enhances albumin glycation by inducing conformational change in BSA and hence could be a potential risk factor if used for a prolonged period.

}, issn = {2046-2069}, doi = {10.1039/c5ra03839a}, author = {Bansode, Sneha B. and Batkulwar, Kedar B. and Warkad, Shrikant D. and Jana, Asis K. and Sengupta, Neelanjana and Kulkarni, Mahesh J.} } @article { ISI:000355856200034, title = {Tris-hydroxymethylaminomethane (THAM): a novel organocatalyst for a environmentally benign synthesis of medicinally important tetrahydrobenzo[b]pyrans and pyran-annulated heterocycles}, journal = {New Journal of Chemistry}, volume = {39}, number = {6}, year = {2015}, month = {MAR}, pages = {4452-4463}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

simple, efficient and environmentally benign protocol has been developed for the one-pot, multicomponent synthesis of medicinally important tetrahydrobenzo[b]pyrans and pyran-annulated heterocycles using a commercially available, inexpensive, non-toxic, and biodegradable tris-hydroxymethylaminomethane (THAM) as a novel organocatalyst. Ambient reaction conditions, wide scope, avoidance of conventional isolation as well as purification techniques and the reusability of the catalyst for five consecutive runs have improved the practical utility of this multicomponent reaction protocol manifold.

}, issn = {1144-0546}, doi = {10.1039/c4nj02346c}, author = {Pandit, Kapil S. and Chavan, Pramod V. and Desai, Uday V. and Kulkarni, Makarand A. and Wadgaonkar, Prakash P.} } @article {42976, title = {3D Polyaniline architecture by concurrent inorganic and organic acid doping for superior and robust high rate supercapacitor performance}, journal = {Scientific Reports}, volume = {6}, year = {2016}, month = {FEB}, pages = {Article No. 21002}, doi = {10.1038/srep21002}, author = {Gawli, Yogesh and Banerjee, Abhik and Dhakras, Dipti and Deo, Meenal S. and Bulani, Dinesh and Wadgaonkar, Prakash P. and Shelke, Manjusha and Ogale, Satishchandra} } @article {43569, title = {Alkyl-chain-separated triphenybenzene - carbazole conjugates and their derived polymers: candidates for sensory, electrical and optical materials}, journal = {Chemistry Select}, volume = {1}, year = {2016}, month = {DEC}, pages = {6649-6657}, abstract = {Four new triphenylbenzene based carbazoles (THPBCz4, THPBCz6, THPBCz8 and THPBCz10) and polycarbazoles (polyTHPBCz4, polyTHPBCz6, polyTHPBCz8 and polyTHPBCz10), have been synthesized. Photoluminescence spectra of the monomers in dichloromethane exhibit two intense bands at 353 and 369 nm. Two additional bands (410 and 435 nm) are also observed due to intermolecular interactions. These bands are more intense in the case of thin films, indicating stronger pp stacking interactions in the solid state. Due to the extended p-conjugation, the polycarbazoles display two main emission bands (495 and 520 nm) which are red shifted as compared to the monocarbazoles. Due to the presence of emissive platforms such as triarylbenzene and carbazole, both monomers and polymers, function as efficient sensors for the detection of polynitroaromatic analytes (PA, DNT, rho-DNB and m-DNB). The electrochemically polymerized carbazole derivatives showed maximum capacitance of 41 F/g for polyTHPBCz6. The SCLC measurement reveals a maximum mobility of 6 x 10(-6) cm(2)/Vs for polyTHPBCz4 that showed better packing due to flexible alkyl chains that connect the conjugated moieties.}, doi = {10.1002/slct.201601428}, author = {Kaleeswaran, D. and Vishnoi, Pratap and Kumar, Subramani and Chithiravel, Sundaresan and Walawalkar, Mrinalini G. and Krishnamoorthy, Kothandam and Murugavel, Ramaswamy} } @article {45839, title = {Capsicum annuum proteinase inhibitor ingestion negatively impacts the growth of sorghum pest Chilo partellus and promotes differential protease expression}, journal = {Biochemistry and Biophysics Reports}, volume = {78}, year = {2016}, month = {DEC}, pages = {302-309}, type = {Article}, abstract = {Background Chilo partellus is an important insect pest infesting sorghum and maize. The larvae internalize in the stem, rendering difficulties in pest management. We investigated the effects of Capsicum annuum proteinase inhibitors (CanPIs) on C. partellus larvae by in-vitro and in-vivo experiments. Methods Recombinant CanPI-7 (with four-Inhibitory Repeat Domains, IRDs), -22 (two-IRDs) and insect proteinase activities were estimated by proteinase assays, dot blot assays and in gel activity assays. Feeding bioassays of lab reared C. partellus with CanPI-7 and -22 were performed. C. partellus proteinase gene expression was done by RT-PCR. In-silico structure prediction of proteinases and CanPI IRDs was carried out, their validation and molecular docking was done for estimating the interaction strength. Results Larval proteinases of C. partellus showed higher activity at alkaline pH and expressed few proteinase isoforms. Both CanPIs showed strong inhibition of C. partellus larval proteinases. Feeding bioassays of C. partellus with CanPIs revealed a dose dependent retardation of larval growth, reduction of pupal mass and fecundity, while larval and pupal periods increased significantly. Ingestion of CanPIs resulted in differential up-regulation of C. partellus proteinase isoforms, which were sensitive to CanPI-7 but were insensitive to CanPI-22. In-silico interaction studies indicated the strong interaction of IRD-9 (of CanPI-22) with Chilo proteinases tested. Conclusions Of the two PIs tested, CanPI-7 prevents induction of inhibitor insensitive proteinases in C. partellus so it can be explored for developing C. partellus tolerance in sorghum. General significance Ingestion of CanPIs, effectively retards C. partellus growth; while differentially regulating the proteinases.}, doi = {10.1016/j.bbrep.2016.09.016}, author = {Jadhav, A. R. and War, A. R. and Nikam, A. N. and Adhav, A. S. and Gupta, V. S. and Sharma, H. C. and Giri, A. P. and Tamhane, V.A.} } @article { ISI:000376417400001, title = {Conformational energy landscape of the ritonavir molecule}, journal = {Journal of Physical Chemistry B}, volume = {120}, number = {19}, year = {2016}, month = {MAY}, pages = {4331-4340}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Conformational polymorphism of ritonavir, a well-known pharmaceutical drug, is intricately linked to its efficacy in the treatment of acquired immunodeficiency syndrome (AIDS). Polymorphic transition from the crystalline form I to form II leads to the loss of bioactivity. The constituent ritonavir molecules adopt a trans configuration about the carbamate torsion angle in the form I crystal, and a cis configuration in the form II crystal. Investigating the energetics and mechanistic features of conformational transitions at the single molecule level is a key step toward decoding the complex features of the solid state polymorphism. In this work, we employ the energy landscape framework to investigate the conformational transitions of an isolated ritonavir molecule. The landscape is explored using discrete path sampling (DPS) and visualized in terms of disconnectivity graphs. We identify two distinct funnels corresponding to the two molecular forms that are identified by crystallography. The two regions can be reliably distinguished using the carbamate torsion angle, and the corresponding interconversion rates are predicted to follow Arrhenius behavior. The results provide mechanistic insight into pathways for cis \<-\> trans interconversion at the molecular level and may also help in elucidating the polymorphic transitions in the crystal state.

}, issn = {1520-6106}, doi = {10.1021/acs.jpcb.5b12272}, author = {Chakraborty, Debayan and Sengupta, Neelanjana and Wales, David J.} } @article { ISI:000370005300013, title = {Convenient synthesis of alpha,alpha {\textquoteleft}- homo- and alpha,alpha {\textquoteleft}-hetero-bifunctionalized poly(epsilon-caprolactone)s by ring opening polymerization: the potentially valuable precursors for miktoarm star copolymers}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {54}, number = {6}, year = {2016}, month = {MAR}, pages = {844-860}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Two new ring opening polymerization (ROP) initiators, namely, (3-allyl-2-(allyloxy)phenyl)methanol and (3-allyl-2-(prop-2-yn-1-yloxy)phenyl)methanol each containing two reactive functionalities viz. allyl, allyloxy and allyl, propargyloxy, respectively, were synthesized from 3-allylsalicyaldehyde as a starting material. Well defined -allyl, -allyloxy and -allyl, -propargyloxy bifunctionalized poly(epsilon-caprolactone)s with molecular weights in the range 4200-9500 and 3600-10,900 g/mol and molecular weight distributions in the range 1.16-1.18 and 1.15-1.16, respectively, were synthesized by ROP of epsilon-caprolactone employing these initiators. The presence of -allyl, -allyloxy and -allyl, -propargyloxy functionalities on poly(epsilon-caprolactone)s was confirmed by FT-IR, H-1, C-13 NMR spectroscopy, and MALDI-TOF analysis. The kinetic study of ROP of epsilon-caprolactone with both the initiators revealed the pseudo first order kinetics with respect to epsilon-caprolactone consumption and controlled behavior of polymerization reactions. The usefulness of -allyl, -allyloxy functionalities on poly(epsilon-caprolactone) was demonstrated by performing the thiol-ene reaction with poly(ethylene glycol) thiol to obtain (mPEG)(2)-PCL miktoarm star copolymer. -Allyl, -propargyloxy functionalities on poly(epsilon-caprolactone) were utilized in orthogonal reactions i.e copper catalyzed alkyne-azide click (CuAAC) with azido functionalized poly(N-isopropylacrylamide) followed by thiol-ene reaction with poly(ethylene glycol) thiol to synthesize PCL-PNIPAAm-mPEG miktoarm star terpolymer. The preliminary characterization of A(2)B and ABC miktoarm star copolymers was carried out by H-1 NMR spectroscopy and gel permeation chromatography (GPC). (c) 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 844-860

}, keywords = {3-allylsalicyaldehyde, alpha {\textquoteleft}-allyloxy and alpha-allyl, alpha {\textquoteleft}-propargyloxy bifunctionalized poly (epsilon-caprolactone)s, alpha-allyl, atom transfer radical polymerization, orthogonal reactions, ring-opening polymerization, star copolymers}, issn = {0887-624X}, doi = {10.1002/pola.27924}, author = {Patil, Sachin S. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.} } @article {43613, title = {Diethylamine-catalyzed environmentally benign synthesis of 1-oxo-hexahydroxanthenes and bis-coumarins at ambient temperature}, journal = {Research on Chemical Intermediates}, volume = {42}, year = {2016}, month = {JUL}, pages = {6313-6325}, abstract = {An extremely simple, economical and environmentally benign protocol has been described for one-pot synthesis of 1-oxo-hexahydroxanthenes by pseudo three-component condensation between salicylaldehydes and dimedone, cyclohexane-1,3dione or 5-methyl cyclohexane-1,3-dione using diethylamine as the catalyst. Based upon the mechanism of the reaction, the protocol has been extended towards the synthesis of tetraketones and bis-coumarins.}, doi = {10.1007/s11164-016-2464-4}, author = {Kupwade, Ravindra V. and Pandit, Kapil S. and Desai, Uday V. and Kulkarni, Makarand A. and Wadgaonkar, Prakash P.} } @article { ISI:000377203300030, title = {Electronic structure and properties of layered gallium telluride}, journal = {Chemical Physics Letters}, volume = {651}, year = {2016}, month = {MAY}, pages = {148-154}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Layer-dependent electronic structure and properties of gallium monochalcogenides, GaX where X=S, Se, Te, have been investigated using first-principles calculations based on various functionals, with a motivation to assess their use in photocatalytic water splitting. Since hydrogen evolution by water splitting using visible light provides a promising way for solar energy conversion, both theoretical and experimental studies have been carried out on the photochemical hydrogen evolution by GaTe. We also present the Raman spectra of GaTe examined by both theory and experiment. (C) 2016 Elsevier B.V. All rights reserved.

}, issn = {0009-2614}, doi = {10.1016/j.cplett.2016.03.045}, author = {Shenoy, U. Sandhya and Gupta, Uttam and Narang, Deepa S. and Late, Dattatray J. and Waghmare, Umesh V. and Rao, C. N. R.} } @article {43436, title = {Evaluating the anticancer activity and nanoparticulate nature of homeopathic preparations of Terminalia chebula}, journal = {Homeopathy}, volume = {105}, year = {2016}, month = {NOV}, pages = {318-326}, abstract = {Background: Breast cancer is the most common cancer diagnosed among women and is the second leading cause of cancer death. Homeopathic medicines are part of the alternative medicines that are given as a supportive therapy in breast cancer. The objective of this study was to investigate the anticancer activity of commercially available homeopathic preparations of Terminalia chebula (TC) and evaluate their nanoparticulate nature. Methods: Mother tincture (MT) and other homeopathic preparations (3X, 6C and 30C) of TC were tested for their effect on the viability of breast cancer (MDAMB231 and MCF7) and non-cancerous (HEK 293) cell lines by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Cell growth assay was performed to analyze the effect of the different potencies on the growth kinetics of breast cancer cells. MT and 6C were evaluated for the presence of nanoparticles by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results: MT decreased the viability of breast cancer (MDAMB231 and MCF7) and non-cancerous (HEK 293) cells. However, the other potencies (3X, 6C and 30C) decreased the viability of only breast cancer cells without affecting the viability of the non-cancerous cells. All the potencies, MT, 3X, 6C and 30C, reduced growth kinetics of breast cancer cells, more specifically at 1:10 dilution at 24, 48 and 72 h. Under SEM, MT appeared as a mesh-like structure whereas under TEM, it showed presence of nanoclusters. On the other hand, 6C potency contained 20 nm sized nanoparticles. Conclusion: The current study reports the anticancer activity of homeopathic preparations of TC against breast cancer and reveals their nanoparticulate nature. These preliminary results warrant further mechanistic studies at both in vitro and in vivo levels to evaluate the potential of TC as nanomedicine in breast cancer.}, doi = {10.1016/j.homp.2016.02.004}, author = {Wani, Kirtee and Shah, Nilesh and Prabhune, Asmita and Jadhav, Arun and Ranjekar, Prabhakar and Kaul-Ghanekar, Ruchika} } @article {43166, title = {Fluoride-mediated dephosphonylation of α-diazo-β-carbonyl phosphonates}, journal = {Organic Letters}, volume = {19}, year = {2016}, month = {DEC}, pages = {372 - 375}, abstract = {The possibility of fluoride-mediated selective dephosphonylation of α-diazo-β-carbonyl phosphonates such as the Ohira-Bestmann reagent has been proposed and executed. The resulting α-diazocarbonyl intermediates undergo a (3 + 2)-cycloaddition at room temperature with conjugated olefins and benzynes. Interestingly, under the current conditions, the resulting cycloaddition products underwent either N-acylation (with excess α-diazo-β-carbonyl phosphonates) or Michael addition (with conjugated olefins).}, author = {Phatake, Ravindra S. and Mullapudi, Venkanna Babu and Wakchaure, Vivek Chandrakant and Ramana, Chepuri V.} } @article { ISI:000378741200010, title = {Fusarium oxysporum mediates systems metabolic reprogramming of chickpea roots as revealed by a combination of proteomics and metabolomics}, journal = {Plant Biotechnology Journal}, volume = {14}, number = {7}, year = {2016}, month = {JUL}, pages = {1589-1603}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Molecular changes elicited by plants in response to fungal attack and how this affects plant-pathogen interaction, including susceptibility or resistance, remain elusive. We studied the dynamics in root metabolism during compatible and incompatible interactions between chickpea and Fusarium oxysporum f. sp. ciceri (Foc), using quantitative label-free proteomics and NMR-based metabolomics. Results demonstrated differential expression of proteins and metabolites upon Foc inoculations in the resistant plants compared with the susceptible ones. Additionally, expression analysis of candidate genes supported the proteomic and metabolic variations in the chickpea roots upon Foc inoculation. In particular, we found that the resistant plants revealed significant increase in the carbon and nitrogen metabolism; generation of reactive oxygen species (ROS), lignification and phytoalexins. The levels of some of the pathogenesis-related proteins were significantly higher upon Foc inoculation in the resistant plant. Interestingly, results also exhibited the crucial role of altered Yang cycle, which contributed in different methylation reactions and unfolded protein response in the chickpea roots against Foc. Overall, the observed modulations in the metabolic flux as outcome of several orchestrated molecular events are determinant of plant{\textquoteright}s role in chickpea-Foc interactions.

}, keywords = {Chickpea, fusarium oxysporum, Metabolomics, NMR, plant-pathogen interaction, proteomics}, issn = {1467-7644}, doi = {10.1111/pbi.12522}, author = {Kumar, Yashwant and Zhang, Limin and Panigrahi, Priyabrata and Dholakia, Bhushan B. and Dewangan, Veena and Chavan, Sachin G. and Kunjir, Shrikant M. and Wu, Xiangyu and Li, Ning and Rajmohanan, Pattuparambil R. and Kadoo, Narendra Y. and Giri, Ashok P. and Tang, Huiru and Gupta, Vidya S.} } @article { ISI:000371021000006, title = {GAME9 regulates the biosynthesis of steroidal alkaloids and upstream isoprenoids in the plant mevalonate pathway}, journal = {Nature Communications}, volume = {7}, year = {2016}, month = {FEB}, pages = {Article Number: 10654}, publisher = {NATURE PUBLISHING GROUP}, address = {MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND}, abstract = {

Steroidal glycoalkaloids (SGAs) are cholesterol-derived molecules produced by solanaceous species. They contribute to pathogen defence but are toxic to humans and considered as anti-nutritional compounds. Here we show that GLYCOALKALOID METABOLISM 9 (GAME9), an APETALA2/Ethylene Response Factor, related to regulators of alkaloid production in tobacco and Catharanthus roseus, controls SGA biosynthesis. GAME9 knockdown and overexpression in tomato and potato alters expression of SGAs and upstream mevalonate pathway genes including the cholesterol biosynthesis gene STEROL SIDE CHAIN REDUCTASE 2 (SSR2). Levels of SGAs, C24-alkylsterols and the upstream mevalonate and cholesterol pathways intermediates are modified in these plants. Delta(7)-STEROL-C5(6)-DESATURASE (C5-SD) in the hitherto unresolved cholesterol pathway is a direct target of GAME9. Transactivation and promoter-binding assays show that GAME9 exerts its activity either directly or cooperatively with the SlMYC2 transcription factor as in the case of the C5-SD gene promoter. Our findings provide insight into the regulation of SGA biosynthesis and means for manipulating these metabolites in crops.

}, issn = {2041-1723}, doi = {10.1038/ncomms10654}, author = {Cardenas, Pablo D. and Sonawane, Prashant D. and Pollier, Jacob and Vanden Bossche, Robin and Dewangan, Veena and Weithorn, Efrat and Tal, Lior and Meir, Sagit and Rogachev, Ilana and Malitsky, Sergey and Giri, Ashok P. and Goossens, Alain and Burdman, Saul and Aharoni, Asaph} } @article {43011, title = {Graphene quantum dot-based on-chip electrochemical DNA hybridization sensor for pancreatic cancer}, journal = {Reports in Electrochemistry}, volume = {6}, year = {2016}, month = {NOV}, pages = {31-40}, doi = {10.2147/RIE.S83253}, author = {Joshi, Preeti Nigam and Waghmode, S} } @article { ISI:000365857100003, title = {Green synthesis of silver nanoparticles from purple acid phosphatase apoenzyme isolated from a new source limonia acidissima}, journal = {Journal of Experimental Nanoscience}, volume = {11}, number = {1}, year = {2016}, month = {JAN}, pages = {28-37}, publisher = {TAYLOR \& FRANCIS LTD}, address = {4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND}, abstract = {

Green synthesis of nanoparticles is regarded as a safe and non-toxic process whereas conventional synthesis using chemical methods produces toxic substance. This study provides a novel insight for enzymatic synthesis method of silver nanoparticles using purple acid phosphatase, isolated from Limonia acidissima (wood apple) as a new source and used in the synthesis of silver nanoparticles. Stable silver nanoparticles were produced by sonochemical method using apoenzyme as a stabilising and capping agent and were characterised by various physicochemical techniques like UV-Visible spectroscopy, Fourier-transform infrared, X-ray diffraction and transmission electron microscopy. X-ray study shows that nanoparticles are composed of silver and silver oxide. The synthesised nanoparticles exhibited excellent antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus.

}, keywords = {green synthesis, Limonia acidissima, purple acid phosphatase, silver nanoparticles}, issn = {1745-8080}, doi = {10.1080/17458080.2015.1025300}, author = {Pawar, Omkar and Deshpande, Neelima and Dagade, Sharda and Waghmode, Shobha and Joshi, Preeti Nigam} } @article { ISI:000370211400055, title = {Highly transparent wafer-scale synthesis of crystalline WS2 nanoparticle thin film for photodetector and humidity-sensing applications}, journal = {ACS Applied Materials \& Interfaces}, volume = {8}, number = {5}, year = {2016}, month = {FEB}, pages = {3359-3365}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

In the present investigation, we report a one-step synthesis method of wafer-scale highly crystalline tungsten disulfide (WS2) nanoparticle thin film by using a modified hot wire chemical vapor deposition (HW-CVD) technique. The average size of WS2 nanoparticle is found to be 25-40 nm over an entire 4 in. wafer of quartz substrate. The low-angle XRD data of WS2 nanoparticle shows the highly crystalline nature of sample along with orientation (002) direction. Furthermore, Raman spectroscopy shows two prominent phonon vibration modes of E12g and A1g at similar to 356 and similar to 420 cm(-1), respectively, indicating high purity of material. The TEM analysis shows good crystalline quality of sample. The synthesized WS2 nanoparticle thin film based device shows good response to humidity and good photosensitivity along with good long-term stability of the device. It was found that the resistance of the films decreases with increasing relative humidity (RH). The maximum humidity sensitivity of 469\% along with response time of similar to 12 s and recovery time of similar to 13 s were observed for the WS2 thin film humidity sensor device. In the case of photodetection, the response time of similar to 51 s and recovery time of similar to 88 s were observed with sensitivity similar to 137\% under white light illumination. Our results open up several avenues to grow other transition metal dichalcogenide nanoparticle thin film for large-area nanoelectronics as well as industrial applications.

}, keywords = {chemical vapor deposition, humidity sensor, nanoparticle, photosensor, thin film, tungsten disulfide}, issn = {1944-8244}, doi = {10.1021/acsami.5b11325}, author = {Pawbake, Amit S. and Waykar, Ravindra G. and Late, Dattatray J. and Jadkar, Sandesh R.} } @article {45860, title = {Hydrogel-derived soft materials for biomimetic and energy-related functions}, journal = {Australian Journal of Chemistry}, volume = {69}, year = {2016}, month = {AUG}, pages = {2-7}, type = {Article}, abstract = {Supramolecular assembly of molecules leading to gelation of large amount of solvents is always a fascinating topic of research. In the very recent past, the exciting developments have marked hydrogels as intriguing materials with excellent features. Hydrogel scaffolds enable the accommodation of organic and/or inorganic guest materials to deliver diverse applications. Hydrogels have been exploited to generate soft materials with mechanical anisotropy, tunable rigidity, self-healing properties, as well as photocatalytic capabilities towards H2 production. Remarkably, the combination of a photocatalyst and a light-harvesting system in the gel matrix provides a unique means to photocatalytic H2 production. The biomimetic applications of hydrogels have also generated much attraction due to their potential demonstrations. The diverse applications underline the significance of such a soft gel medium to reach the final goal. Herein, important reports pertaining to the use of hydrogels as an effective way to generate advanced materials for biomimetic and energy-related issues are discussed. }, doi = {10.1071/CH15304}, author = {Goudappagouda, and Wakchaure, V. C. and Ranjeesh, K. C. and Babu, S. S.} } @article { ISI:000375647900005, title = {Incorporation of rigid polyaromatic groups in polybenzimidazole-based polymeric ionic liquids: assertive effects on gas permeation properties}, journal = {Polymer}, volume = {93}, year = {2016}, month = {JUN}, pages = {30-36}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Polymeric ionic liquids (PILs) have emerged as promising membrane materials for CO2 separation. The present work is aimed at investigating the effects of incorporation of rigid polyaromatic hydrocarbons, viz., pyrene and anthracene, in polybenzimidazole-based PILs. The effects of substituent and anion variation on the gas permeation properties of PILs using pure gases were examined at 20 atm upstream pressure. The results were correlated with physical properties of PILs. The pyrene substituted PIL exhibited similar to 10 fold increase in CO2 permeability as compared to its precursor polymer PBI-BuI. The combination of a CO2 specific anion and bulky group substitution offered higher CO2 permeability as well as appreciable permselectivity than their structural analogue that was devoid of IL functionality. The permeation properties of present PILs were superior to those of conventional glassy polymers such as polysulfone, matrimid and polycarbonate which are widely studied for their gas permeation properties. (C) 2016 Elsevier Ltd. All rights reserved.

}, keywords = {Gas permeation, membranes, Polymeric ionic liquids}, issn = {0032-3861}, doi = {10.1016/j.polymer.2016.03.093}, author = {Shaligram, Sayali V. and Rewar, Anita S. and Wadgaonkar, Prakash P. and Kharul, Ulhas K.} } @article {45864, title = {Isolation and virtual screening of antimicrobial prodigiosin pigment from oxalotrophic Serratia marcescens OX_R strain}, journal = {Journal of Applied Pharmaceutical Science}, volume = {6}, year = {2016}, month = {NOV}, pages = {052-058}, type = {Article}, abstract = {Prodigiosin a multifaceted secondary metabolite produced by Serratia spp. having great potential as a pharmaceutical. In the present study we demonstrate that oxalate supplementation in peptone glycerol production media increased organoleptic characters and yield of prodigiosin pigment extracted from oxalotrophic Serratia marcescens OX_R isolated from Indian bat guano sample. The pigment was demonstrated in-vitro as an antibacterial agent against common opportunistic skin surface pathogen Staphylococcus aureus NCIM 5021 strain as killing activity by agar well diffusion method. The docking analysis and pharmacophore modelling indicated that the probable mechanism of action of the prodigiosin was against Staphylococcus aureus DNA gyrase protein. The pigment was also found to efficiently dye both cotton and latex polymer. In summary, we describe here an oxalotrophic Serratia marcescens which may serve as a potent and economical resource of prodigiosin which owing to its dyeing and anti-bacterial activities finds future avenues to be developed as dressing material for nosocomial subjects or burn victim patients.}, doi = {10.7324/JAPS.2016.601108}, author = {Suryavanshi, M. V. and Waghmode, S. R. and Bharti, N. and Choudhari, P. B. and Hingamire, T. B. and Shouche, Y. S.} } @article { ISI:000379314700006, title = {Low-overpotential electrocatalytic water splitting with noble-metal-free nanoparticles supported in a sp(3) n-rich flexible COF}, journal = {Advanced Energy Materials}, volume = {6}, number = {13}, year = {2016}, month = {JUL}, pages = {Article No. 1600110}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY}, abstract = {

Covalent organic frameworks (COFs) are crystalline organic polymers with tunable structures. Here, a COF is prepared using building units with highly flexible tetrahedral sp(3) nitrogens. This flexibility gives rise to structural changes which generate mesopores capable of confining very small (\<2 nm sized) non-noble-metal-based nanoparticles (NPs). This nanocomposite shows exceptional activity toward the oxygen-evolution reaction from alkaline water with an overpotential of 258 mV at a current density of 10 mA cm(-2). The overpotential observed in the COF-nanoparticle system is the best in class, and is close to the current record of approximate to 200 mV for any noble-metalfree electrocatalytic water splitting system-the Fe-Co-Ni metal-oxide-film system. Also, it possesses outstanding kinetics (Tafel slope of 38.9 mV dec(-1)) for the reaction. The COF is able to stabilize such small-sized NP in the absence of any capping agent because of the COF-Ni(OH)(2) interactions arising from the N-rich backbone of the COF. Density-functional-theory modeling of the interaction between the hexagonal Ni(OH)(2) nanosheets and the COF shows that in the most favorable configuration the Ni(OH)(2) nanosheets are sandwiched between the sp(3) nitrogens of the adjacent COF layers and this can be crucial to maximizing their synergistic interactions.

}, issn = {1614-6832}, doi = {10.1002/aenm.201600110}, author = {Mullangi, Dinesh and Dhavale, Vishal M. and Shalini, Sorout and Nandi, Shyamapada and Collins, Sean and Woo, Tom and Kurungot, Sreekumar and Vaidhyanathan, Ramanathan} } @article { ISI:000369665800035, title = {Mechanochemically synthesized covalent organic framework as a proton-conducting solid electrolyte}, journal = {Journal of Materials Chemistry A}, volume = {4}, number = {7}, year = {2016}, month = {JAN}, pages = {2682-2690}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Mechanochemistry has become an increasingly important synthetic tool for a waste-free environment. However, the poor quality of the so-derived materials in terms of their crystallinity and porosity has been their major drawback for any practical applications. In this report, we have for the first time successfully leveraged such characteristics to show that the mechanochemically synthesized bipyridine based covalent organic framework (COF) outperforms its conventional solvothermal counterpart as an efficient solid-state electrolyte in PEM fuel cells. Marking the first such attempt in COFs, a Membrane Electrode Assembly (MEA) fabricated using the mechanochemically synthesized COF was observed to inhibit the fuel crossover and build up a stable Open Circuit Voltage (OCV = 0.93 V at 50 degrees C), thereby establishing itself as an effective solid electrolyte material (with a proton conductivity of 1.4 x 10(-2) S cm(-1)), while the solvothermally synthesized COF proved ineffective under similar conditions.

}, issn = {2050-7488}, doi = {10.1039/c5ta10521h}, author = {Shinde, Digambar Balaji and Aiyappa, Harshitha Barike and Bhadra, Mohitosh and Biswal, Bishnu P. and Wadge, Pritish and Kandambeth, Sharath and Garai, Bikash and Kundu, Tanay and Kurungot, Sreekumar and Banerjee, Rahul} } @article { ISI:000382079800019, title = {Modulation of charge carrier mobility by side-chain engineering of bi(thienylenevinylene)thiophene containing PPE-PPVs}, journal = {RSC Advances}, volume = {6}, number = {57}, year = {2016}, month = {MAY}, pages = {51642-51648}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Four 2-dimensional conjugated poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene) polymers containing a lateral bi(thienylenevinylene)thiophene unit (BTE-PVs) were synthesised and characterised. The investigated polymers share the same conjugated structure, but differ in the anchoring positions of solubilising linear octyloxy/branched 2-ethylhexyloxy side-chains. UV-vis spectra of the polymers in dilute chloroform solutions and as thin films were studied. X-Ray diffraction patterns as well as the bulk charge transport of polymer films cast from chlorobenzene solutions were also investigated. A dramatic effect of the solubilising side-chains on the charge carrier mobility of BTE-PV films was observed, with bulk hole mobility values ranging between 1.3 x 10(-5) cm(2) V-1 s(-1) and 2.2 x 10(-2) cm(2) V-1 s(-1), which is not ascribable to evident structural variations of the polymer films. It is shown that the combination of linear octyloxy and branched 2-ethylhexyloxy side-chains is favorable for the charge transport properties of BTE-PVs, compared to the incorporation of only linear or only branched side-chains.

}, issn = {2046-2069}, doi = {10.1039/c6ra00858e}, author = {Jadhav, Rupali R. and Camaioni, Nadia and Oppelt, Kerstin and Tinti, Francesca and Gazzano, Massimo and Fattori, Valeria and Wadgaonkar, Prakash P. and Rathgeber, Silke and Hoppe, Harald and Egbe, Daniel A. M.} } @article { ISI:000374073800014, title = {Naphthoquinone based chemosensor 2-(2 {\textquoteleft}-aminoethylpyridine)-3-chloro-1,4-naphthoquinone: detection of metal ions, X-ray -crystal structures and DFT studies}, journal = {Journal of Molecular Structure}, volume = {1114}, year = {2016}, month = {JUN}, pages = {132-143}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Naphthoquinone based Chemosensor 2; 2-(2{\textquoteright}-aminoethylpyridine)-3-chloro-1,4-napthoquinone have been synthesized and characterized. Chemosensor 2 crystallizes in the orthorhombic space group Pbcn and shows extensive intramolecular as well as intermolecular hydrogen bonding interactions. Each molecule of Chemosensor 2 showed interaction with five neighboring molecules via C-H center dot center dot center dot N, N-H center dot center dot center dot N, C-H center dot center dot center dot Cl and C-H center dot center dot center dot O interactions. Slipped pi-pi stacking interaction was observed in adjacent quinonoid and benzenoid rings. Chemosensor abilities of Chemosensor 2 ligand have been evaluated with metal ions viz. Cu2+, Ni2+, Zn2+, Co2+, Fe3+, Mn2+, Cr3+, Hg2+, La3+ and Cd2+ in methanol, methanol-water mixture and in presence of mild base triethylamine. Stoichiometry of Chemosensor 2 with metal ions such as Cu2+, Ni2+, Zn2+ and Co2+ ions was determined by Jobs method in methanol and were found as 1:1 for Cu2+ and 2:1 for Ni2+, Zn2+ Co2+. The variation in the metal ligand ratio is observed in aqueous media for Cu2+. Chemosensor 2 can be used selectively for naked eye detection of Cu2+ ions. The association constant obtained in methanol shows the trend Cu2+\>Ni2+\>Co2+. Cu2+ and two (Ni-1 and Ni-2) Ni2+ complexes were synthesized. Ni-2 complex showed coordination of Chemosensor 2 ligands was through pyridine nitrogen{\textquoteright}s only. The Chemosensor 2 and its deprotonated forms in methanol, water and triethylamine were also studied by TD-DFT studies. (C) 2016 Elsevier B.V. All rights reserved.

}, keywords = {Aminonaphthoquinone, Chemosensor, hydrogen bonding, Naphthoquinone, pi-pi stacking, TD-DFT}, issn = {0022-2860}, doi = {10.1016/j.molstruc.2016.02.065}, author = {Patil, Amit and Ware, Anuja P. and Bhand, Sujit and Chakravarty, Debamitra K. and Gonnade, Rajesh G. and Pingale, Subhash S. and Salunke-Gawali, Sunita} } @article { ISI:000374351200005, title = {Next-generation ammonia pretreatment enhances cellulosic biofuel production}, journal = {Energy \& Environmental Science}, volume = {9}, number = {4}, year = {2016}, month = {FEB}, pages = {1215-1223}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A new liquid ammonia pretreatment methodology called Extractive Ammonia (EA) was developed to simultaneously convert native crystalline cellulose I-beta (CI) to a highly digestible cellulose IIII (CIII) allomorph and selectively extract up to B45\% of the lignin from lignocellulosic biomass with near-quantitative retention of all polysaccharides. EA pretreated corn stover yielded a higher fermentable sugar yield compared to the older Ammonia Fiber Expansion (AFEX) process while using 60\% lower enzyme loading. The EA process preserves extracted lignin functionalities, offering the potential to co-produce lignin-derived fuels and chemicals in the biorefinery. The single-stage EA fractionation process achieves high biofuel yields (18.2 kg ethanol per 100 kg untreated corn stover, dry weight basis), comparable to those achieved using ionic liquid pretreatments. The EA process achieves these ethanol yields at industrially-relevant conditions using low enzyme loading (7.5 mg protein per g glucan) and high solids loading (8\% glucan, w/v).

}, issn = {1754-5692}, doi = {10.1039/c5ee03051j}, author = {Sousa, Leonardo da Costa and Jin, Mingjie and Chundawat, Shishir P. S. and Bokade, Vijay V. and Tang, Xiaoyu and Azarpira, Ali and Lu, Fachuang and Avci, Utku and Humpula, James and Uppugundla, Nirmal and Gunawan, Christa and Pattathil, Sivakumar and Cheh, Albert M. and Kothari, Ninad and Kumar, Rajeev and Ralph, John and Hahn, Michael G. and Wyman, Charles E. and Singh, Seema and Simmons, Blake A. and Dale, Bruce E. and Balan, Venkatesh} } @article { ISI:000369603400016, title = {Phenothiazine and carbazole substituted pyrene based electroluminescent organic semiconductors for OLED devices}, journal = {Journal of Materials Chemistry C}, volume = {4}, number = {5}, year = {2016}, month = {DEC}, pages = {1009-1018}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Due to their easy availability, low cost and opportunities for exploiting reactions of bromo substituents, 1,3,6,8-tetrabromopyrene has attracted major attention in the organic electronics community for designing and constructing novel classes of pyrene based organic semiconducting functional materials. In the present work, 1,3,6,8-tetrabromo pyrene was transformed into the corresponding tetrasubstituted carbazole and phenothiazine derivatives using the classical Suzuki coupling reaction. These newly synthesized materials with a carbazole substituent (PY-CA) and a phenothiazine substituent (PY-PH) were characterised thoroughly and were successfully used as an active light-emitting layer in organic light emitting diodes which resulted in blue and green emission with promising device performance. PY-CA exhibited the maximum brightness at around 2500 cd m(-2) and the power efficiency of 1.5 lm W-1 while that of PY-PH exhibited 2116 cd m(-2) and 0.45 lm W-1 respectively.

}, issn = {2050-7526}, doi = {10.1039/c5tc03690a}, author = {Salunke, Jagadish K. and Wong, F. L. and Feron, Krishna and Manzhos, Sergei and Lo, Ming Fai and Shinde, Durgaprasad and Patil, Abhijeet and Lee, C. S. and Roy, V. A. L. and Sonar, Prashant and Wadgaonkar, Prakash P.} } @article { ISI:000375559600001, title = {Phytogenic silver, gold, and bimetallic nanoparticles as novel antitubercular agents}, journal = {International Journal of Nanomedicine}, volume = {11}, year = {2016}, month = {MAY}, pages = {1889{\textemdash}1897}, publisher = {DOVE MEDICAL PRESS LTD}, address = {PO BOX 300-008, ALBANY, AUCKLAND 0752, NEW ZEALAND}, abstract = {

Purpose: Multi- and extensively drug-resistant tuberculosis (TB) is a global threat to human health. It requires immediate action to seek new antitubercular compounds and devise alternate strategies. Nanomaterials, in the present scenario, have opened new avenues in medicine, diagnosis, and therapeutics. In view of this, the current study aims to determine the efficacy of phytogenic metal nanoparticles to inhibit mycobacteria. Methods: Silver (AgNPs), gold (AuNPs), and gold-silver bimetallic (Au-AgNPs) nanoparticles synthesized from medicinal plants, such as Barleria prionitis, Plumbago zeylanica, and Syzygium cumini, were tested against Mycobacterium tuberculosis and M. bovis BCG. In vitro and ex vivo macrophage infection model assays were designed to determine minimum inhibitory concentration (MIC) and half maximal inhibitory concentration of nanoparticles. Microscopic analyses were carried out to demonstrate intracellular uptake of nanoparticles in macrophages. Besides this, biocompatibility, specificity, and selectivity of nanoparticles were also established with respect to human cell lines. Results: Au-AgNPs exhibited highest antitubercular activity, with MIC of \<2.56 mu g/mL, followed by AgNPs. AuNPs did not show such activity at concentrations of up to 100 mu g/mL. In vitro and ex vivo macrophage infection model assays revealed the inhibition of both active and dormant stage mycobacteria on exposure to Au-AgNPs. These nanoparticles were capable of entering macrophage cells and exhibited up to 45\% cytotoxicity at 30 mu g/mL (ten times MIC concentration) after 48 hours. Among these, Au-AgNPs synthesized from S. cumini were found to be more specific toward mycobacteria, with their selectivity index in the range of 94-108. Conclusion: This is the first study to report the antimycobacterial activity of AuNPs, AgNPs, and Au-AgNPs synthesized from medicinal plants. Among these, Au-AgNPs from S. cumini showed profound efficiency, specificity, and selectivity to kill mycobacteria. These should be investigated further to develop novel TB nanoantibiotics.

}, keywords = {Antimycobacterial agent, Cytotoxicity, drug resistance, Mycobacteria, Nanoparticles, tuberculosis}, issn = {1178-2013}, doi = {10.2147/IJN.S102488}, author = {Singh, Richa and Nawale, Laxman and Arkile, Manisha A. and Wadhwani, Sweety and Shedbalkar, Utkarsha and Chopade, Snehal and Sarkar, Dhiman and Chopade, Balu Ananda} } @article { ISI:000377425900059, title = {Problem solving and environmentally benign approach toward diversity oriented synthesis of novel 2-amino-3-phenyl (or Alkyl) sulfonyl-4H-chromenes at ambient temperature}, journal = {ACS Sustainable Chemistry \& Engineering}, volume = {4}, number = {6}, year = {2016}, month = {JUN}, pages = {3450-3464}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

A problem solving, environmentally benign, and diversity oriented protocol has been described for multi component synthesis of medicinally privileged 2-amino-3-phenyl (or methyl) sulfonyl-4H-chromenes by one-pot, three component condensation among aldehydes, phenyl (or methyl) sulphonyl acetonitrile, and alpha-naphthol, 3-dimethylamino phenol, 4-hydroxy-N-methyl-quinoline-2-one as well as 4-hydroxycarbazole, using diethylamine as an efficient organo catalyst. The catalyst employed is commercially available, inexpensive, and nontoxic. Ambient reaction conditions, very high yields, wide scope, and avoidance of conventional isolation as well as chromatographic purification have improved the practical utility of this protocol manifold.

}, keywords = {2-Amino-3-methylsulfonyl-4H-chromenes, 2-Amino-3-phenylsulfonyl-4H-chromenes, diethylamine, green chemistry, Multicomponent synthesis, organocatalyst}, issn = {2168-0485}, doi = {10.1021/acssuschemeng.6b00484}, author = {Pandit, Kapil S. and Kupwade, Ravindra V. and Chavan, Pramod V. and Desai, Uday V. and Wadgaonkar, Prakash P. and Kodam, Kisan M.} } @article { ISI:000380943900048, title = {Proton play in the formation of low molecular weight chitosan (LWCS) by hydrolyzing chitosan with a carbon based solid acid}, journal = {Carbohydrate Polymers}, volume = {151}, year = {2016}, month = {OCT}, pages = {417-425}, publisher = {ELSEVIER SCI LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, abstract = {

Low molecular weight chitosan (LWCS) constitute a special class of value added chemicals that are primarily obtained from crustacean shells, which are the main water pollutants from crabs and shrimp processing centers. Unlike chitin and chitosan, LWCS possess improved solubility in water and aqueous solutions, making them widely applicable in numerous fields ranging from drug delivery to waste water treatment. Among the methods employed for their production, chemical breakdown by strong liquid acids has yielded good success. However, this method is met with severe concerns arising from the harsh nature of liquid acids, which may corrode the reactors for commercial synthesis, and their limited reusability. The physical methods like ultrasound and microwave are energy intensive in nature, while the enzymatic methods are expensive and offers limited scope for reuse. We have attempted to overcome these problems by employing carbon based solid acid (CSA) for hydrolyzing chitosan to LWCS. CSA can be easily produced using activated carbon, a cost-effective and easily available raw material. Reactions were carried out between chitosan and CSA in a hydrothermal glass reactor and the products, separated by cold centrifugation, were purified and dried. The dried products were characterized for their molecular weight and solubility. Results indicated more than ten-fold decrease in the molecular weight of chitosan and the product exhibited water solubility. The CSA could be used upto four times, without regeneration, to give a consistent quality product. The aqueous solution of resulting LWCS exhibited a pH of 6.03 +/- 0.11, as against the acidic pH range of solutions of commercially available LWCS, indicating its suitability for biomedical applications. Our investigation facilitates a {\textquoteleft}green approach{\textquoteright} that may be employed for commercial production of value added chemicals from waste products of marine industry. (C) 2016 Elsevier Ltd. All rights reserved.

}, keywords = {Carbon based solid acid, Chitosan, green synthesis, Hydrolysis, Low molecular weight chitosan}, issn = {0144-8617}, doi = {10.1016/j.carbpol.2016.05.082}, author = {Krishnan, R. Akhil and Deshmukh, Pranjal and Agarwal, Siddharth and Purohit, Poorvi and Dhoble, Deepa Arun and Waske, Prashant and Khandekar, Dileep and Jain, Ratnesh and Dandekar, Prajakta} } @article { ISI:000371560100018, title = {Rapid methane hydrate formation to develop a cost effective large scale energy storage system}, journal = {Chemical Engineering Journal}, volume = {290}, year = {2016}, month = {APR}, pages = {161-173}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

Natural gas (NG) is the cleanest burning fossil fuel and its usage can significantly reduce CO2 emissions from power plants. With its widespread use, there is an ever increasing need to develop technologies to store NG on a large scale. NG storage via clathrate hydrates is the best option for a large scale storage system because of its non-explosive nature, mild storage conditions, high volumetric capacity and being an environmentally benign process. In this work, we demonstrate a new method to achieve rapid methane hydrate formation in an unstirred tank reactor configuration (UTR) at moderate temperature and pressure conditions employing tetrahydrofuran (THF) as a promoter. For the first time, THF is reported to act both as a thermodynamic and an excellent kinetic promoter for methane hydrate formation. We demonstrate a multi-scale experimental validation of our method to a volumetric sample scale-up factor of 120 and internal reactor diameter scale-up factor of 10. Further, new insights on the dissociation behavior of the hydrates are reported. There is a competitive edge for storing NG via clathrate hydrates compared to compressed natural gas storage both in terms of cost and safety. (C) 2016 Elsevier B.V. All rights reserved.

}, keywords = {Energy storage, Enhanced kinetics, Gas hydrates, Natural gas storage, Tetrahydrofuran, Unstirred tank reactor}, issn = {1385-8947}, doi = {10.1016/j.cej.2016.01.026}, author = {Veluswamy, Hari Prakash and Wong, Alison Jia Hui and Babu, Ponnivalavan and Kumar, Rajnish and Kulprathipanja, Santi and Rangsunvigit, Pramoch and Linga, Praveen} } @article {45873, title = {Role of helical spring locked washer in bolted join tanalysis: A review}, journal = {International Journal of Structural Integrity}, volume = {7}, year = {2016}, month = {JUN}, pages = {346-358}, type = {Article}, abstract = {Purpose-The purpose of this paper is to give a brief introduction of helical spring locked washer along with extensive literatures survey on role of helical spring locked washer in bolted joint analysis. It is very small component of bolted joint assembly, but it play vital role in holding the assembly components together. Helical shape of it produces spring effect in the assembly which is used for keeping the assembly in tension and that is lock the assembly under dynamic loading due to vibrations to avoid the accident. Design/methodology/approach-The critical literatures survey identifies role of helical spring locked washer in different areas such as design optimization, mechanism of loosening-resistant components, bolted joint analysis, finite element-based modeling, analysis and simulation. The related literatures show contribution of helical spring washers in evaluation of anti-loosening performance of assemblies as compare to other types of washers. Findings-It proposed that design optimization of helical spring locked washer is needed as it improves the performance in the form of load-deflection characteristics, load bearing capacity and provides the best locking force for optimize functionality. Originality/value-The originality or value of this paper is to finding research gaps in literatures by dividing literatures into seven different research areas and concentrating the only on role of helical spring locked washer in bolted joint analysis. }, doi = {10.1108/IJSI-04-2015-0012}, author = {Wagh, H. K. and Desale, G. R. and Tripathi, K.} } @article { ISI:000369515700086, title = {Solution chemistry-based nano-structuring of copper dendrites for efficient use in catalysis and superhydrophobic surfaces}, journal = {RSC Advances}, volume = {6}, number = {10}, year = {2016}, month = {JAN}, pages = {8416-8430}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Despite their performance and economic advantages over Ag and Au, there have been no focused research efforts on the nano-structuring of Cu dendrites with respect to fine-tuning their structure/morphology towards the efficiency enhancement of suitable applications. Reported here is a simple, versatile, environmentally-friendly and galvanic replacement reaction-based solution chemistry methodology to synthesize highly nano-structured copper dendrites targeted towards the efficiency enhancement of desired applications. Herein, copper is deposited galvanically on an Al foil in the presence of NaCl/HCl, wherein the chloride anions augment an uninterrupted replacement reaction. The growth process of Cu dendrites has been probed in detail. The presence of acid, the type of Cu2+ precursor salt, the Cu2+ ion concentration, the surfactant concentration and the reaction temperature are all demonstrated to provide useful means of modulating the surface structure/morphology of the dendrites. Notably, dendrites formed in the presence of acid are found to be highly nano-structured. Moreover, it is also found that the morphology/structure of the obtained Cu deposit depends considerably upon the choice of the Cu2+ precursor salt, a parameter that has been completely overlooked in the past. The acid-induced nano-structuring of the dendrites is exploited for enhancing their efficiency in the catalytic reduction of para-nitrophenol and for fabricating self-cleaning superhydrophobic surfaces. These nano-structured dendrites are demonstrated to have the highest ever normalized rate constant for the catalytic reduction reaction. Superhydrophobic surfaces fabricated using these dendrites demonstrate excellent self-cleaning abilities, showing a high contact angle (159 degrees) with low contact angle hysteresis (2 degrees). This facile synthetic strategy for the fabrication of highly nano-structured Cu dendrites is expected to open up avenues for the production of Cu-based low-cost functional nano/micro-materials.

}, issn = {2046-2069}, doi = {10.1039/c5ra22683j}, author = {Bakthavatsalam, Rangarajan and Ghosh, Subrata and Biswas, Ratul Kumar and Saxena, Aayushi and Raja, Alagar and Thotiyl, Musthafa Ottakam and Wadhai, Sandip and Banpurkar, Arun G. and Kundu, Janardan} } @article {43632, title = {Spatially branched CdS-Bi2S3 heteroarchitecture: single step hydrothermal synthesis approach with enhanced field emission performance and highly responsive broadband photodetection}, journal = {RSC Advances}, volume = {6}, year = {2016}, month = {SEP}, pages = {95092-95100}, abstract = {This report explores the controlled hierarchical synthesis of CdS nanostructure branches on Bi2S3 nanorod cores via a facile single step hydrothermal route. Morphological and structural studies reveal the formation of CdS-Bi2S3 heteroarchitecture with excellent stoichiometry between the constituent elements. The growth of CdS over Bi2S3 strongly depends on optimization of the reaction conditions, especially low PVP concentration. Furthermore, the as-synthesized CdS-Bi2S3 heteroarchitecture demonstrates multifunctionality in field emission and photoresponse. Interestingly, the CdS-Bi2S3 heteroarchitecture shows enhanced field emission properties such as low turn-on field (similar to 1.8 V mu m(-1) for 10 mu A cm(2)), high emission current density and better current stability in comparison to Bi2S3 and other nanostructures. The as-synthesized CdS-Bi2S3 heteroarchitecture exhibits considerable response and recovery times, similar to 207 ms and 315 ms, respectively in comparison to bare Bi2S3 nanostructures (similar to 655 ms and 678 ms). The present results demonstrate CdS-Bi2S3 heteroarchitecture as a potential candidate for future optoelectronic device applications.}, doi = {10.1039/c6ra21085f}, author = {Bankar, Prashant K. and Pawar, Mahendra S. and Pawbake, Amit S. and Warule, Sambhaji S. and Late, Dattatray J. and More, Mahendra A.} } @article { ISI:000372766400005, title = {Surface tailored PS/TiO2 composite nanofiber membrane for copper removal from water}, journal = {Journal of Colloid and Interface Science}, volume = {469}, year = {2016}, month = {MAY}, pages = {31-37}, publisher = {ACADEMIC PRESS INC ELSEVIER SCIENCE}, address = {525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA}, abstract = {

Polystyrene (PS)/TiO2 composite nanofiber membranes have been fabricated by electrospinning process for Cu2+ ions removal from water. The surface properties of the polystyrene nanofibers were modulated by introducing TiO2 nanoparticles. The contact angle of the PS nanofiber membrane was found to be decreased with increasing concentration of TiO2, depicted enhanced hydrophilicity. These membranes were highly effective in adsorbing Cu2+ ions from water. The adsorption capacity of these membranes was found to be 522 mg/g, which is significantly higher than the results reported by other researchers. This was attributed to enhanced hydrophilicity of the PS/TiO2 composite nanofiber membranes and effective adsorption property of TiO2 nanoparticles. (C) 2016 Elsevier Inc. All rights reserved.

}, keywords = {electrospinning, Metal ion adsorption, Nanofiber, TiO2, Water treatment/purification}, issn = {0021-9797}, doi = {10.1016/j.jcis.2016.01.054}, author = {Wanjale, Santosh and Birajdar, Mallinath S. and Jog, Jyoti Prakash and Neppalli, Ramesh and Causin, Valerio and Karger-Kocsis, Jozsef and Lee, Jonghwi and Panzade, Prasad} } @article { ISI:000373492800012, title = {Synthesis and properties of poly(arylene ether)s based on 3-pentadecyl 4,4{\textquoteright}-biphenol}, journal = {Polymer International}, volume = {65}, number = {5}, year = {2016}, month = {MAY}, pages = {567-576}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

A new biphenol, 3-pentadecyl 4,4-biphenol, was synthesized starting from 3-pentadecylphenol and was polycondensed with 4,4-difluorobenzophenone, 1,3-bis(4-fluorobenzoyl)benzene and bis(4-fluorophenyl)sulfone to obtain poly(arylene ether)s with biphenylene linkages in the backbone and pendent pentadecyl chains. Inherent viscosities and number-average molecular weights (M-n) of the poly(arylene ether)s were in the range 0.50 - 0.81 dL g(-1) and 2.2 x 10(4) - 8.3 x 10(4), respectively. Detailed NMR spectroscopic studies of the poly(arylene ether)s indicated the presence of constitutional isomerism which existed because of the non-symmetrical structure of 3-pentadecyl 4,4-biphenol. The poly(arylene ether)s readily dissolved in common organic solvents such as dichloromethane, chloroform and tetrahydrofuran and could be cast into tough, transparent and flexible films from their chloroform solutions. The poly(arylene ether)s exhibited T-g values in the range 35-60 degrees C which are lower than that of reference poly(arylene ether)s without pentadecyl chains. The 10\% decomposition temperatures (T-10) of the poly(arylene ether)s were in the range 410-455 degrees C indicating their good thermal stability. A gas permeation study of poly(ether sulfone) containing pendent pentadecyl chains revealed a moderate increase in permeability for helium, hydrogen and oxygen. However, there was a large increase in permeability for carbon dioxide which could be attributed to the internal plasticization effect of pendent pentadecyl chains. (c) 2016 Society of Chemical Industry

}, keywords = {cashew nut shell liquid (CNSL), gas permeation study, pentadecyl, poly(arylene ether)s, thermal stability}, issn = {0959-8103}, doi = {10.1002/pi.5095}, author = {Tawade, Bhausaheb V. and Shaligram, Sayali V. and Valsange, Nitin G. and Kharul, Ulhas K. and Wadgaonkar, Prakash P.} } @article { ISI:000369679500020, title = {Synthesis and self-assembly of dumbbell shaped ZnO sub-micron structures using low temperature chemical bath deposition technique}, journal = {Materials Chemistry and Physics}, volume = {169}, year = {2016}, month = {FEB}, pages = {152-157}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

We report well dispersed horizontal growth of ZnO sub-micron structures using simplest technique ever known i.e. chemical bath deposition (CBD). A set of samples were prepared under two different cases A) dumbbell shaped ZnO grown in CBD bath and B) tubular ZnO structures evolved from dumbbell shaped structures by dissolution mechanism. Single phase wurtzite ZnO formation is confirmed using X-ray diffraction (XRD) technique in both cases. From the morphological investigations performed using scanning electron microscopy (SEM), sample prepared under case A indicate formation of hex bit tool (HBT) shaped ZnO crystals, which observed to self-organize to form dumbbell structures. Further these microstructures are then converted into tubular structures as a fragment of post CBD process. The possible mechanism responsible for the self-assembly of HBT units to form dumbbell structures is discussed. Observed free excitonic peak located at 370 nm in photoluminescence (PL) spectra recorded at 18 K indicate that the micro/nanostructures synthesized using CBD are of high optical quality. (C) 2015 Elsevier B.V. All rights reserved.

}, keywords = {Electron microscopy (STEM, Microstructure, Nanostructures, Optical properties, Photoluminescence spectroscopy, Raman spectroscopy and scattering, TEM and SEM)}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2015.11.042}, author = {Borade, P. and Joshi, K. U. and Gokarna, A. and Lerondel, G. and Walke, P. and Late, Dattatray J. and Jejurikar, S. M.} } @article {43621, title = {Synthesis and study of calixarene-doped polypyrrole-TiO2/ZnO composites: antimicrobial activity and electrochemical sensors}, journal = {Journal of Polymer Research}, volume = {23}, year = {2016}, month = {JAN}, abstract = {The present communication describes the synthesis of an electroactive nanocomposite of calixarene- doped polypyrrole ( PPY) containing an oxide of Ti/ Zn. The additive TiO2/ ZnO serves as an oxidizing agent for the polymerization, thus avoiding the use of hazardous organic solvents while calixarene doping stabilizes the polymer. The materials synthesized herein were characterized by UV- visible spectroscopy, FT- IR spectroscopy, scanning electron microscopy ( SEM), transmission electron microscopy ( TEM), energy- dispersive X- ray spectroscopy ( EDX), X- ray photoelectron spectroscopy ( XPS), and cyclic voltammetry ( CV) of synthesized nanocomposites. It was revealed that the resulting calixarene- doped polypyrrole- TiO2/ ZnO nanocomposite has ( 1) long- time stability, ( 2) significant electrochemical activity for sensing formaldehyde, and ( 3) good antimicrobial activity.}, doi = {10.1007/s10965-016-0921-9}, author = {Waghmode, Babasaheb J. and Husain, Zahid and Joshi, Meenal and Sathaye, Shivaram D. and Patil, Kashinath R. and Malkhede, Dipalee D.} } @article { ISI:000377612300008, title = {Synthesis of revised structure of klaivanolide (acetylmelodorinol)}, journal = {Arkivoc}, number = {2}, year = {2016}, month = {OCT}, pages = {116-122}, publisher = {ARKAT USA INC}, address = {C/O ALAN R KATRITZKY, UNIV FLORIDA, DEPT CHEMISTRY, PO BOX 117200, GAINESVILLE, FL 32611 USA}, abstract = {

Klaivanolide (acetylmelodorinol) is an anti-leishmanial/anti-trypanosomal agent isolated from Uvaria klaineana and the structure was originally assigned as a 7-membered lactone with extended conjugation and S-configuration at the lactone junction. Very recently, the structure of klaivanolide was revised as previously known compound acetylmelodorinol. Now, we have synthesized the revised structure in racemic form using a short route.

}, keywords = {acetylmelodorinol, Klaivanolide, leishmaniasis, Natural product}, issn = {1551-7004}, doi = {10.3998/ark.5550190.p009.231}, author = {Raut, Gajanan N. and Wagh, Sachin B. and Reddy, D. Srinivasa} } @article {43430, title = {Wide band gap and conducting tungsten carbide(WC) thin films prepared by hot wire chemical vapor deposition(HW-CVD) method}, journal = {Materials Letters}, volume = {183}, year = {2016}, month = {NOV}, pages = {315-317}, abstract = {

In this letter, we report synthesis of tungsten carbide (WC) thin films having wide band gap(3.22-3.3 eV) with high electrical conductivity (80-1260 S/cm) by HW-CVD using heated using heated W filament and Tetra-fluoro-methane (CF4) gas. Formation of WC was confirmed by low angle XRD, Raman spectroscopy and x-ray photoelectron spectroscopy. UV-Visible spectroscopy analysis revealed that the synthesized films have high transmission at wavelength 500 nm. Electrical properties measured using Hall measurement show that these films are semiconductor. The obtained results imply that the growth of WC thin films is mainly from the atomic species(W and C) evaporated from the hot filament. The HW-CVD opens a novel route to synthesize wide band gap and conducting WC at a cost-efficient way for DSSCs and hydrogen evolution reaction (HER). (C) 2016 Elsevier B. V. All rights reserved.

}, doi = {10.1016/j.matlet.2016.07.132}, author = {Pawbake, Amit and Waykar, Ravindra and Jadhavar, Ashok and Kulkarni, Rupali and Waman, Vaishali and Date, Abhijit and Late, Dattatray J. and Pathan, Habib and Jadkar, Sandesh} } @article {43493, title = {Acetone and methanol fruit extracts of terminalia paniculata inhibit HIV-1 infection in vitro}, journal = {Natural Product Research}, volume = {31}, year = {2017}, month = {JAN}, pages = {1468-1471}, abstract = {In this study, we report the in vitro anti-HIV1 activity of acetone and methanol extracts of fruit of Terminalia paniculata. Cytotoxicity tests were conducted on TZM-bl cells and peripheral blood mononuclear cells (PBMC), the CC50 values of both the extracts were 260g/mL. Using TZM-bl cells, the extracts were tested for their ability to inhibit replication of two primary isolates HIV-1 (X4, Subtype D) and HIV-1 (R5, Subtype C). The activity against HIV-1 primary isolate (R5, Subtype C) was confirmed using activated PBMC and by quantification of HIV-1 p24 antigen. Both the extracts showed anti-HIV1 activity in a dose-dependent manner. The EC50 values of the acetone and methanol extracts of T. paniculata were 10.3g/mL. The enzymatic assays were performed to determine the mechanism of action which indicated that the anti-HIV1 activity might be due to inhibition of reverse transcriptase (77.7\% inhibition) and protease (69.9\% inhibition) enzymes. }, doi = {10.1080/14786419.2016.1258561}, author = {Durge, Ankita and Jadaun, Pratiksha and Wadhwani, Ashish and Chinchansure, Ashish A. and Said, Madhukar and Thulasiram, H. V. and Joshi, Swati P. and Kulkarni, Smita S.} } @article {45702, title = {Aromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups: synthesis and characterization}, journal = {Journal of Polymer Research}, volume = {24}, year = {2017}, month = {MAR }, pages = {57}, type = {Article}, abstract = {

A new bisphenol, 1,1-bis-[(4-hydroxyphenyl)-1-(4-phenylsulfonyl) phenyl)] ethane (DPSBP) was synthesized starting from diphenylsulfide and was characterized by spectroscopic methods. DPSBP was polycondensed with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of IPC and TPC (50: 50 mol\%) by phase-transfer catalysed interfacial polymerization method to obtain aromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups. A series of copolyesters was also obtained by polycondensation of varying molar proportions of DPSBP and bisphenol-A (BPA) with TPC. (Co) polyesters exhibited inherent viscosities in the range 0.56-1.57 dLg(-1) and number average molecular weights (Mn) were in the range 28,650-80,230 g/mol. Polyesters dissolved readily in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran and aprotic polar solvents such as N-methylpyrrolidone, and N, N-dimethylacetamide. Tough, transparent and flexible films of polyesters could be cast from their chloroform solutions. X-Ray diffraction studies indicated amorphous nature of aromatic polyesters. Polyesters showed T-g values in the range 223-257 degrees C while T-10 values were in the range of 469-484 degrees C indicating their excellent thermal stability.

}, keywords = {Aromatic polyesters, Bulky pendent group, solubility, thermal stability}, issn = {1022-9760}, doi = {10.1007/s10965-017-1217-4}, author = {Bapat, Snehalata P. and Jadhav, Sushilkumar A. and Valsange, Nitin G. and Tawade, Bhausaheb V. and Honkhambe, Pandurang N. and Chavan, Nayaku N. and Wadgaonkar, Prakash P.} } @article {43973, title = {Calixarene based nanocomposite materials for high performance supercapacitor electrode}, journal = {New Journal of Chemistry}, volume = {41}, year = {2017}, month = {JUL}, type = {Article}, abstract = {A functionalised calixarene {4-Sulphatocalix [6] arene Hydrate (SC6)} stabilises MoS2/partially reduced graphene oxide (rGO) nanosheet. Such stabilised SC6-rGO/SC6-MoS2 and SC6 doped polyaniline (PANI) together forms a nanocomposite hybrid material for supercapacitor electrode. It was fabricated by an in situ polymerization method. Transmission electron microscopy (TEM) results suggest that PANI nanostructures grow homogeneously onto the surfaces of SC6 functionalised MoS2. Calixarene acts as a dopant for PANI as well as a stabiliser for the 2D nanosheets of rGO/MoS2. The characterisation of composites together with basic components was done by using various techniques namely, solid-state FT-IRspectroscopy, X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The electrochemical performance was analysed by cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectrometry (EIS). It was found that the SC6 functionalised MoS2 and SC6 doped PANI formed a uniform nanocomposite. The synthesised composites show high specific capacitance (691 F/g) and good cycling stability during the charge-discharge process when used as supercapacitor electrodes. The improvement in electrochemical performance of composites is assigned to synergistic effect of SC6 stabilised MoS2 and doped PANI. Our investigation highlighted the importance of use of calixarene in composites for above stated supercapacitor performance. The role of calixarene in the present study opens a way for the application of alike materials in the composite supercapacitors for energy storage applications.}, doi = {10.1039/C7NJ01125C}, author = {Waghmode, Babasaheb J. and Soni, Roby and Patil, Kashinath Rangu and Malkhede, Dipalee D.} } @article {43852, title = {Cascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping}, journal = {Chemical Communications}, volume = {53}, year = {2017}, month = {JUL}, pages = {7072-7075}, type = {Article}, abstract = {Light harvesting donor-acceptor assemblies are indispensable to efficiently tap photons. In an attempt to improve the light harvesting efficiency of an acceptor doped assembly, we design and synthesize a donor-acceptor-donor triad which exhibits an exceptional intramolecular energy transfer with excellent efficiency. Moreover, a facile cascade energy transfer (energy funnelling) is observed in the presence of a series of second acceptors (63-91\% efficiency) with tunable emission colours. Self-assembled nanosheets formed by the triad in the presence of acceptors exhibit cascade energy transfer assisted tunable emission. In addition, use of chiral acceptors induces chirality to the triad and results in the formation of chiral nanosheets alongwith cascade energy transfer. Here chiral induction, nanosheet formation and cascade energy transfer in the presence of chiral acceptors are used as tools to probe the intercalation of acceptor molecules in the donor scaffold.}, doi = {10.1039/c7cc02994b}, author = {Goudappagouda and Wakchaure, Vivek Chandrakant and Ranjeesh, Kayaramkodath Chandran and Abhai, Chalona Antony Ralph and Babu, Sukumaran Santhosh} } @article {45752, title = {Catalyst-free oxidation of sulfides to sulfoxides and diethylamine catalyzed oxidation of sulfides to sulfones using oxone as an oxidant}, journal = {Research on Chemical Intermediates}, volume = {43}, year = {2017}, month = {DEC}, pages = {6875-6888}, type = {Article}, abstract = {

We describe here our journey from the failure of our attempts in controlled oxidation of sulfides to sulfoxides using an Oxone(A (R))-KBr combination to our success in the development of a catalyst-free protocol for the oxidation of sulfides to sulfoxides using Oxone as an oxidant. We also describe the failure of our attempts at the oxidation of sulfides to sulfones using an excess of Oxone-KBr as well as Oxone, and our success towards the development of a rapid, scalable and chromatography-free protocol for the oxidation of sulfides to sulfones using diethylamine-Oxone as an unprecedented catalyst-oxidant combination. [GRAPHICS] .

}, keywords = {diethylamine, organocatalysis, Oxidation, Oxone, Sulfones, Sulfoxides}, issn = {0922-6168}, doi = {10.1007/s11164-017-3026-0}, author = {Kupwade, R. V. and Khot, S. S. and Lad, U. P. and Desai, U. V. and Wadgaonkar, P. P.} } @article {43831, title = {Catalytic conversion of biomass}, journal = {Chemcatchem}, volume = {9}, year = {2017}, month = {JUL}, pages = {2613-2614}, type = {Article}, doi = {10.1002/cctc.201700884}, author = {Dhepe, Paresh and Tomishige, Keiichi and Wu, Kevin C. -W.} } @article {43376, title = {Clickable polyurethanes based on s- triazine ring containing aromatic diisocyanate bearing pendent alkyne group: synthesis and postmodification}, journal = {Journal of Polymer Science Part A Polymer Chemistry}, volume = {55}, year = {2017}, month = {MAR}, pages = {1008-1020}, type = {Article}, abstract = {A new s-triazine ring containing aromatic diisocyanate bearing a pendent alkyne group, namely, 2,4-bis(4-isocyanatophenoxy)-6-(prop-2-yn-1-yloxy)-1,3,5-triazine was synthesized and reacted with various diols viz., 1,10-decanediol, tetraethylene glycol and polyethylene glycols in the presence of dibutyltin dilaurate as the catalyst to obtain a series of linear polyurethanes. The selected polyurethanes possessing pendent alkyne groups were postmodified with chemically diverse azides viz., 1-(azidomethyl)benzene, 1-(azidomethyl)pyrene, and methoxy end-caped poly(ethylene glycol) azide via copper-catalysed azide-alkyne Huisgen 1,3-dipolar cycloaddition. FTIR and 1H NMR spectra indicated quantitative click reaction. UV{\textendash}vis and fluorescence spectroscopic analysis confirmed complete incorporation of pyrenyl groups indicating the formation of fluorescence active polyurethane by postmodification with 1-(azidomethyl)pyrene. TG analysis of polyurethanes indicated two stage weight loss and their thermal stability, as judged by T10 values, was governed by weight percent of urethane linkages. The water contact angle measurements revealed improved wettability with increased content of PEG either in the backbone of polyurethanes or as grafted chains. DLS and TEM studies confirmed that certain polyurethanes possessing PEG segments displayed self-assembly in aqueous solution, which was further supported by pyrene encapsulation studies using UV{\textendash}vis spectroscopy. {\textcopyright} 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1008{\textendash}1020}, keywords = {Click chemistry, Diisocynate, Polyethelene Glycol, polyurethanes, Self- Assembly}, doi = {10.1002/pola.28461}, author = {Garg, Kavita and Chatterjee, Deepshikha and Wadgaonkar, Prakash} } @article {43781, title = {Click-chemistry-based multicomponent condensation approach for design and synthesis of spirochromene-tethered 1,2,3-triazoles as potential antitubercular agents}, journal = {Research on Chemical Intermediates}, volume = {43}, year = {2017}, month = {OCT}, pages = {5675-5690}, type = {Article}, doi = {10.1007/s11164-017-2955-y}, author = {Chavan, Pramod V. and Pandit, Kapil S. and Desai, Uday V. and Wadgaonkar, Prakash P. and Nawale, Laxman and Bhansali, Sujit and Sarkar, Dhiman} } @article {45744, title = {Concurrent synthesis of SnO/SnO2 nanocomposites and their enhanced photocatalytic activity}, journal = {Journal of Solid State Electrochemistry}, volume = {21}, year = {2017}, month = {JAN}, pages = {9-17}, type = {Article}, abstract = {

The SnO/SnO2 nanocomposites were synthesized using semisolvothermal reaction technique. These nanocomposites were prepared using different combination of solvents viz., ethanol, water, and ethylene glycol at 180 A degrees C for 24 h. The synthesized nanocomposites were analyzed with various characterization techniques. Structural analysis indicates the formation of tetragonal phase of SnO2 for the sample prepared in ethanol, whereas for other solvent combinations, the mixture of SnO and SnO2 having tetragonal crystal structures were observed. The optical study shows enhanced absorbance in the visible region for all the prepared SnO/SnO2 nanocomposites. The observed band gap was found to be in the range of 3.0 to 3.25 eV. Microstructural determinations confirm the formation of nanostructures having spherical as well as rod-like morphology. The size of nanoparticles in ethanol-mediated solvent was found to be in the range of 5 to 7 nm. Thermogravimetric analysis indicate the weight gain around 1.3 wt\% confirming the conversion of SnO to SnO2 material. The photocatalytic activity of synthesized nanocomposites was evaluated by following the aqueous methylene blue (MB) degradation. The sample prepared in ethylene glycol-mediated solvent showed highest photoactivity having apparent rate constant (K-app) 0.62 x 10(-2) min(-1).

}, keywords = {Dye-degradation, Nanocomposite, Photocatalysis, tin oxide}, issn = {1432-8488}, doi = {10.1007/s10008-016-3328-y}, author = {Roy, Animesh and Arbuj, Sudhir and Waghadkar, Yogesh and Shinde, Manish and Umarji, Govind and Rane, Sunit and Patil, Kashinath and Gosavi, Suresh and Chauhan, Ratna} } @article {45768, title = {Crystallisation-enhanced bulk hole mobility in phenothiazine-based organic semiconductors}, journal = {Scientific Reports}, volume = {7}, year = {2017}, month = {APR }, pages = {46268}, type = {Article}, abstract = {

A series of three novel donor-acceptor systems based on C(3)-malononitrile-substituted phenothiazines was synthesised in good overall yields and their thermal, spectroscopic, and electrochemical properties were characterised. The compounds were prepared through a sequence of Ullmann-coupling, Vilsmeier-Haack formylation and Knoevenagel-condensation, followed by Suzuki-coupling reactions for introduction of aryl substitutents at C(7) position of the phenothiazine. The introduction of a donor unit at the C(7) position exhibited a weak impact on the optical and electrochemical characteristics of the compounds and led to amorphous films with bulk hole mobilities in the typical range reported for phenothiazines, despite the higher charge delocalisation as attested by computational studies. In contrast, highly ordered films were formed when using the C(7)-unsubstituted 3-malononitrile phenothiazine, exhibiting an outstanding mobility of 1 x 10(-3) cm(2) V-1 s(-1), the highest reported for this class of compounds. Computational conformational analysis of the new phenothizanes suggested that free rotation of the substitutents at the C(7) position suppresses the ordering of the system, thereby hampering suitable packing of the new materials needed for high charge carrier mobility.

}, issn = {2045-2322}, doi = {10.1038/srep46268}, author = {Shinde, D. B. and Salunke, Jagadish K. and Candeias, Nuno R. and Tinti, Francesca and Gazzano, Massimo and Wadgaonkar, P. P. and Priimagi, Arri and Camaioni, Nadia and Vivo, Paola} } @article {43930, title = {Diethylamine Dess-Martin periodinane: an efficient catalyst-oxidant combination in a sequential, one-pot synthesis of difficult to access 2-amino-3,5-dicarbonitrile-6-sulfanylpyridines at ambient temperature}, journal = {RSC Advances}, volume = {7}, year = {2017}, month = {AUG}, pages = {38877-38883}, type = {Article}, abstract = {Herein, diethylamine Dess{\textendash}Martin periodinane has been demonstrated for the first time as an efficient catalyst{\textendash}oxidant combination in a sequential, one-pot synthesis of medicinally privileged but difficult to access 2-amino-3,5-dicarbonitrile-6-sulfanylpyridines via a pseudo-four component reaction between 2,6-disubstituted benzaldehydes, malononitrile, and thiols. Ambient reaction conditions, excellent yields, and total avoidance of conventional isolation as well as purification are the noteworthy merits of this developed protocol.}, doi = {10.1039/C7RA07738F}, author = {Kupwade, Ravindra V. and Khot, Supriya and Kulkarni, M. A. and Desai, Uday V. and Wadgaonkar, Prakash P.} } @article {44152, title = {Direct production of furfural in one-pot fashion from raw biomass using bronsted acidic ionic liquids}, journal = {Scientific Reports}, volume = {7}, year = {2017}, month = {OCT}, pages = {Article Number: 13508}, type = {Article}, abstract = {The conversion of raw biomass into C5-sugars and furfural was demonstrated with the one-pot method using Bronsted acidic ionic liquids (BAILs) without any mineral acids or metal halides. Various BAILs were synthesized and characterized using NMR, FT-IR, TGA, and CHNS microanalysis and were used as the catalyst for raw biomass conversion. The remarkably high yield (i.e. 88\%) of C5 sugars from bagasse can be obtained using 1-methyl-3(3-sulfopropyl)-imidazolium hydrogen sulfate ([C3SO3HMIM][HSO4]) BAIL catalyst in a water medium. Similarly, the [C3SO3HMIM][HSO4] BAIL also converts the bagasse into furfural with very high yield (73\%) in one-pot method using a water/toluene biphasic solvent system.}, doi = {10.1038/s41598-017-13946-4}, author = {Matsagar, Babasaheb M. and Hossain, Shahriar A. and Islam, Tofazzal and Alamri, Hatem R. and Alothman, Zeid A. and Yamauchi, Yusuke and Dhepe, Paresh L. and Wu, Kevin C. W.} } @article {43481, title = {Fluoride-mediated dephosphonylation of alpha-diazo-beta-carbonyl phosphonates}, journal = {Organic Letters}, volume = {19}, year = {2017}, month = {JAN}, pages = {372-375}, abstract = {The possibility of fluoride-mediated selective dephosphonylation of alpha-diazo-beta-carbonyl phosphonates such as the Ohira-Bestmann reagent has been proposed and executed. The resulting alpha-diazocarbonyl intermediates undergo a (3 + 2)pcycloaddition at room temperature with conjugated olefins and benzynes. Interestingly, under the current conditions, the resulting cycloaddition products underwent either N-acylation (with excess alpha-diazo-beta-carbonyl phosphonates) or Michael addition (with conjugated olefins).}, doi = {10.1021/acs.orglett.6b03573}, author = {Phatake, Ravindra S. and Mullapudi, Venkannababu and Wakchaure, Vivek C. and Ramana, Chepuri V.} } @article {43804, title = {Healable network polymers bearing flexible poly(Lauryl Methacrylate) chains via thermo-reversible furan-maleimide diels-alder reaction}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {55}, year = {2017}, month = {AUG}, pages = {2700-2712}, type = {Article}, abstract = {A new ATRP initiator containing two furyl rings, namely, bis(furan-2-ylmethyl) 2-bromopentanedioate was synthesized starting from commercially available L-glutamic acid as a precursor. Well-defined bisfuryl-terminated poly(lauryl methacrylate) macromonomers with molecular weight and dispersity in the range 5000-12,000 g mol(-1) and 1.30-1.37, respectively, were synthesized employing the initiator by atom transfer radical polymerization (ATRP). Independently, 1,1{\textquoteright},1"(nitrilotris(ethane-2,1-diyl)) tris(1H-pyrrole-2,5-dione) was synthesized as a tris-maleimide counterpart for furan-maleimide click reaction. Thermo-reversible network polymer bearing flexible poly(lauryl methacrylate; (PLMA) chains was obtained by furan-maleimide Diels-Alder click reaction of bisfurylterminated PLMA with 1,1{\textquoteright},1"-(nitrilotris(ethane-2,1-diyl)) tris(1Hpyrrole-2,5-dione). The prepared network polymer showed retro-Diels-Alder reaction in the temperature range 110-170 degrees C as determined from DSC analysis. The presence of low Tg (-40 degrees C) PLMA chains induced chain mobility to the network structure which led to the complete scratch healing of the coating at 60 degrees C in five days due to furan-maleimide adduct formation. The storage modulus of the network polymer was found to be 3.7 x 10(4) Pa at the constant angular frequency of 5 rad/ sec and strain of 0.5\%. The regular reversal of storage (G0) and loss modulus (G") was observed with repeated heating (40 to 110 degrees C) and cooling cycles (110 to 40 degrees C) at constant angular frequency and strain. (C) 2017 Wiley Periodicals, Inc.}, keywords = {ethane, Monomers, polymerization}, doi = {10.1002/pola.28677}, author = {Patil, Sachin S. and Torris, Arun and Wadgaonkar, Prakash P.} } @article {43850, title = {Hexaphosphate-derived phosphorus-functionalized carbon for lithium-ion battery anode}, journal = {Chemistryselect}, volume = {2}, year = {2017}, month = {JUL}, pages = {5600-5607}, type = {Article}, abstract = {

We show that high-temperature annealing of a dried hexaphosphate, namely phytic acid, renders activated (micro-porous) and phosphorus-functionalized graphene like carbon in a one-step process. At high enough temperature few volatile phosphates serve as porogen-forming entities while other groups reactively functionalize the carbon surface. The optimized material has high effective surface area due to the presence of defect states. As an anode material for Li-ion battery, it exhibits a reversible capacity that is double that of the graphite and is stable for 1000 cycles even at a high current of 5 A g(-1). This result is attributed to the concurrent presence of micropores and phosphorus containing groups in the carbon matrix.

}, doi = {10.1002/slct.201700909}, author = {Gawli, Yogesh and Wahid, Malik and Fernandez, Rohan and Kothari, Dushyant and Shelke, Manjusha and Ogale, Satishchandra B.} } @article {43855, title = {Improved tolerance against helicoverpa armigera in transgenic tomato over-expressing multi-domain proteinase inhibitor gene from capsicum annuum}, journal = {Physiology and Molecular Biology of Plants}, volume = {23}, year = {2017}, month = {JUL}, pages = {597-604}, type = {Article}, abstract = {Plant proteinase inhibitors (PIs) are plant defense proteins and considered as potential candidates for engineering plant resistances against herbivores. Capsicum annuum proteinase inhibitor (CanPI7) is a multi-domain potato type II inhibitor (Pin-II) containing four inhibitory repeat domains (IRD), which target major classes of digestive enzymes in the gut of Helicoverpa armigera larvae. Stable integration and expression of the transgene in T1 transgenic generation, were confirmed by established molecular techniques. Protein extract of transgenic tomato lines showed increased inhibitory activity against H. armigera gut proteinases, supporting those domains of CanPI7 protein to be effective and active. When T1 generation plants were analyzed, they exhibited antibiosis effect against first instar larvae of H. armigera. Further, larvae fed on transgenic tomato leaves showed delayed growth relative to larvae fed on control plants, but did not change mortality rates significantly. Thus, better crop protection can be achieved in transgenic tomato by overexpression of multi-domain proteinase inhibitor CanPI7 gene against H. armigera larvae.}, doi = {10.1007/s12298-017-0456-5}, author = {Tanpure, Rahul S. and Barbole, Ranjit S. and Dawkar, Vishal V. and Waichal, Yashashree A. and Joshi, Rakesh S. and Giri, Ashok P. and Gupta, Vidya S.} } @article {44401, title = {In situ grown nickel nanoparticles in a calixarene nanoreactor on a graphene-MoS2 support for efficient water electrolysis}, journal = {Sustainable Energy \& Fuels}, volume = {1}, year = {2017}, month = {AUG}, pages = {1329-1338}, abstract = {Electrochemical production of hydrogen, facilitated in electrolysers, holds great promise for energy storage and solar fuel production. Catalysis of the oxygen evolution reaction (OER) is a bottleneck of this process. However, the sluggish OER kinetics and the utilization of precious metal catalysts are key obstacles in the broad deployment of this energy technology. We report the preparation and use of an inexpensive GrMoS(2)SC(8)Ni nanocomposite material as a highly effective OER catalyst in an alkaline electrolyte. Experimental investigations have shown that improvements can be realized in the catalytic performance of Ni metal if it is a component of the composite material. We propose an explanation for these enhancements based on a hydrogen acceptor concept. This concept comprises the stabilization of an *-OOH intermediate, which effectively lowers the potential needed for breaking bonds on the surface. Herein, an inexpensive immobilized SC8 layer was used as the nanoreactor to synthesize metallic Ni nanoparticles (NPs) through an in situ redox process. The process was applied to form immobilized NPs on flat and curved 2D surfaces. The outstanding OER performance of Ni NPs could be attributed to their large surface area, efficient mass and charge transport, and high structural stability arising from the unique SC8 cage structure, built on the GrMoS(2) substrate. The GrMoS(2)SC(8)Ni nanocomposite shows the highest activity, exhibiting a 214 mV overpotential at 10 mA cm(-2) (equivalent to 10\% efficiency of solarto-fuel conversion) and a Tafel slope of 31 mV dec(-1) in 1 M KOH solution. It further demonstrates high stability as there is no apparent OER activity loss (based on a chronoamperometry test) or particle aggregation (based on SEM image observation) after a 10 h anodization test. The facile preparation method and high efficiency and durability enable this electrocatalyst to be a promising candidate for future large-scale applications in water splitting. Thus, this work opens a new avenue toward the development of highly efficient, inexpensive OER catalysts.}, doi = {10.1039/c7se00190h}, author = {Waghmode, Babasaheb J. and Bhange, Siddheshwar N. and Unni, SreeKuttan M. and Patil, Kashinath R. and Malkhede, Dipalee D.} } @article {43459, title = {Investigation of the biocompatibility and cytotoxicity associated with ROP initiator and its role in bulk polymerization of L-lactide}, journal = {Polymer}, volume = {111}, year = {2017}, month = {FEB}, pages = {244-251}, abstract = {Poly (L-lactide) (PLLA) is one of the most attractive polymers for use in biomedical applications. In such applications it is necessary to reduce the use of toxic chemicals and catalysts used in PLLA synthesis, to minimize any adverse effects. In view of this, we have performed ring opening polymerization (ROP) of Llactide (LA) using biocompatible initiator, namely, Zinc L-Proline (ZnP) in bulk. High molecular weight PLLA (Mw up to 1.45 x 10(5) Da) was obtained using the ZnP complex. The ZnP complex is safe, easy to prepare, store and handle. H-1 and C-13 NMR spectra of PLLA were used to determine the extent of monomer conversion and stereo sequence respectively. Differential Scanning Calorimetry (DSC) and Size Exclusion Chromatography (SEC) were used to determine thermal properties, Mn, Mw and polydispersity index respectively. The mechanism of ROP of LA in the presence of ZnP was studied using Density Functional Theory (DFf) which was in good agreement with results from H-1 NMR and Matrix-Assisted Laser Desorption/Ionization Spectrometry (MALDI-TOF). Biocompatibility/non toxicity of PLLA prepared using ZnP was studied in-vitro using MTT assay by examining the proliferation rate of mouse myoblast C2C12 cell line. Escherichia coli and Staphylococcus aureus were used for the study of antibacterial activity of PLLA. (C) 2017 Elsevier Ltd. All rights reserved.}, doi = {10.1016/j.polymer.2017.01.058}, author = {Parwe, Sharad P. and Warkad, Shrikant D. and Mane, Manoj V. and Shedage, Pranita S. and Garnaik, Baijayantimala} } @article {43954, title = {Multicolour and nearly white light emission in YP0.8V0.2O4:Sm3+ nanorods: controlled energy transfer}, journal = {Journal of Alloys and Compounds}, volume = {726}, year = {2017}, month = {DEC}, pages = {1161-1167}, type = {Journal Article}, abstract = {Nanorods of YP0.8V0.2O4:Sm{\textthreesuperior}$^{+}$ have been synthesized under hydrothermal conditions. Substitution of vanadium (V$^{5}$$^{+}$) sites in YVO4 by phosphorus ions (P$^{5}$$^{+}$) has been confirmed by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electron microscopy. Careful selection of Sm{\textthreesuperior}$^{+}$ concentration in YP0.8V0.2O4 enables to achieve the controlled energy transfer from the VO4{\textthreesuperior}$^{-}$ absorption to the excited states of Sm{\textthreesuperior}$^{+}$ ions. The controlled energy transfer has been confirmed from the steady state luminescence and decay lifetime studies of VO4{\textthreesuperior}$^{-}$ emission. With the controlled retention of VO4{\textthreesuperior}$^{-}$ emission, tuning of light emission from the singly (Sm{\textthreesuperior}$^{+}$) doped YP0.8V0.2O4 nanorods is realized. At a particular doping concentration of Sm{\textthreesuperior}$^{+}$ (1.25 at.\%), a nearly white light emission is observed. The quantum yield of this nearly white light emission is found to be \~{}28\%. Tunability of the light and white light emission are supported by CIE chromaticity. The energy transfer efficiency from the VO4{\textthreesuperior}$^{-}$ absorption to the excited states of Sm{\textthreesuperior}$^{+}$ ion in YP0.8V0.2O4 reaches upto \~{}86\% with the doping concentration of 2.25 at.\%. }, keywords = {Energy Transfer, Luminescence, Multicolor, Nanorod}, doi = {10.1016/j.jallcom.2017.08.099}, author = {Singh, N.S.}, editor = {Wangkhem, R.} } @article {43940, title = {New pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence}, journal = {New Journal of Chemistry}, volume = {41}, year = {2017}, month = {OCT}, pages = {11383-11390}, type = {Article}, abstract = {A new pyrene cored small organic molecule viz. 1,3,6,8-tetrakis(4-((5-(9H-carbazol-9-yl) pentyl)oxy) phenyl)pyrene (PY-II) was designed and synthesized. The carbazole moiety with an alkyl spacer was introduced at 1, 3, 6 and 8 positions of the pyrene core to improve the charge transport properties and solution processability. PY-II exhibited excellent solubility in common organic solvents and high thermal stability up to 345 degrees C. The photoluminescence quantum yield (PLQY) of PY-II in solution was found to be 0.9 with bright blue emission near 450 nm which is just appropriate for the human eye. The solution processed non-doped OLED device fabricated using PY-II as an emissive layer afforded a pure blue emission with CIE coordinates of 0.16 and 0.16, a power efficiency of 0.17 lm W-1, a maximum current efficiency of 0.41 cd A(-1) and a maximum brightness of 202 cd m(-2).}, doi = {10.1039/c7nj01921a}, author = {Valsange, Nitin G. and Wong, F. L. and Shinde, Durgaprasad and Lee, C. S. and Roy, V. A. L. and Manzhos, Sergei and Feron, K. and Chang, Samuel and Katoh, Ryuzi and Sonar, Prashant and Wadgaonkar, Prakash P.} } @article {44042, title = {Nutty carbon: morphology replicating hard carbon from walnut shell for na ion battery anode}, journal = {ACS Omega}, volume = {2}, year = {2017}, month = {JUL}, chapter = {3601{\textendash}3609}, abstract = {
Abstract Image

Efficient Na ion intercalation/deintercalation in the semigraphitic lattice of a hard carbon derived from the walnut shell is demonstrated. High-temperature (1000 {\textdegree}C) pyrolysis of walnut shells under an inert atmosphere yields a hard carbon with a low surface area (59 m2\ g{\textendash}1) and a large interplanar\ c\ axis separation of 0.39{\textendash}0.36 nm as compared to 0.32 nm for graphite, suitable for Na ion intercalation/deintercalation. A stable reversible capacity of 257 mAh g{\textendash}1\ is observed at a current density of 50 mA g{\textendash}1\ for such nutshell-derived carbon (NDC) with an impressive rate performance. No loss of electrochemical performance is observed for high current cycling (100 mA g{\textendash}1\ {\textrightarrow} 2 A g{\textendash}1\ {\textrightarrow} 100 mA g{\textendash}1). Additionally, the NDC shows remarkably stable electrochemical performance up to 300 charge{\textendash}discharge cycles at 100 mA g{\textendash}1\ with a minimal drop in capacity.

}, keywords = {Batteries, Biological and Medicinal chemistry, Biological materials, diffraction, Electric Properties, Electrode-electrolyte interface, spectra, Surface structure, Thermal properties}, doi = {10.1021/acsomega.7b00633}, author = {Wahid, M. and Gawli, Y. and Puthusseri, D. and Kumar, A. and Shelke, M. V. and Ogale, S.} } @article {44116, title = {Overcoming the lack of oral availability of cyclic hexapeptides: design of a selective and orally available ligand for the integrin alpha v beta 3}, journal = {Angewandte Chemie-International Edition}, volume = {56}, year = {2017}, month = {DEC}, pages = {16405-16409}, type = {Article}, abstract = {Ahighly systematic approach for the development of both orally bioavailable and bioactive cyclic N-methylated hexapeptides as high affinity ligands for the integrin alpha v beta 3 is based on two concepts: a) screening of systematically designed libraries with spatial diversity and b) masking of the peptide charge with a lipophilic protecting group. The key steps of the method are 1) initial design of a combinatorial library of Nmethylated analogues of the stem peptide cyclo(d-Ala-Ala(5)); 2) selection of cyclic peptides with the highest intestinal permeability; 3) design of sublibraries with the bioactive RGD sequence in all possible positions; 4) selection of the best ligands for RGD-recognizing integrin subtypes; 5) finetuning of the affinity and selectivity by additional Ala to Xaa substitutions; 6) protection of the charged functional groups according to the prodrug concept to regain intestinal and oral permeability; 7) proof of biological effects in mice after oral administration.}, doi = {10.1002/anie.201709709}, author = {Weinmueller, Michael and Rechenmacher, Florian and Marelli, Udaya Kiran and Reichart, Florian and Kapp, Tobias G. and Raeder, Andreas F. B. and Di Leva, Francesco Saverio and Marinelli, Luciana and Novellino, Ettore and Munoz-Felix, Jose M. and Hodivala-Dilke, Kairbaan and Schumacher, Adi and Fanous, Joseph and Gilon, Chaim and Hoffman, Amnon and Kessler, Horst} } @article {43796, title = {Partially bio-based poly(amide imide)s by polycondensation of aromatic diacylhydrazides based on lignin-derived phenolic acids and aromatic dianhydrides: synthesis, characterization, and computational studies}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {55}, year = {2017}, month = {NOV}, pages = {3636-3645}, type = {Article}, abstract = {

Two new bio-based diacylhydrazide monomers, namely, 4,4-(propane-1,3-diylbis(oxy))bis(3-methoxybenzohydrazide) and 4,4-(propane-1,3-diylbis(oxy))bis(3,5-dimethoxybenzohydrazide) were synthesized starting from lignin-derived phenolic acids, namely, vanillic acid and syringic acid. A series of poly(amide imide)s was synthesized by polycondensation of these diacylhydrazide monomers with commercially available aromatic dianhydrides. Poly(amide imide)s showed inherent viscosity in the range 0.44-0.56 dLg(-1) and exhibited good solubility in organic solvents. Poly(amide imide)s could be cast into transparent, flexible, and tough films from their N,N-dimethylacetamide solutions. Poly(amide imide)s showed 10\% weight loss in the temperature range 340-364 degrees C indicating their good thermal stability. Glass transition temperature (T-g) of poly(amide imides)s were measured by DSC and DMA which were in the range 201-223 degrees C and 214-248 degrees C, respectively. The T-g values of poly(amide imide)s were dependent on the number methoxy substituents on aromatic rings of diacylhydrazide monomers. Molecular dynamics simulation studies revealed that chain rigidity is the dominant factor for observed trends in T-g. (c) 2017 Wiley Periodicals, Inc.

}, keywords = {Biobased Polymers, Computational studies, Glass-transaction temperature, lignin, Monomers, Plant oils, Polyimide, Reneable resources, Renewable resources, Step-growth polymers, structure-property relations, Sustanaible Polymers, Thermal night, Thermosetting resins, Vanillin}, issn = {0887-624X}, doi = {10.1002/pola.28748}, author = {Kuhire, Sachin S. and Sharma, Pragati and Chakrabarty, Suman and Wadgaonkar, Prakash P.} } @article {43897, title = {Partially bio-based processable polyimides based on aromatic diamine derived from cardanol}, journal = {green Materials}, volume = {5}, year = {2017}, month = {JUN}, type = {Article}, abstract = {A partially bio-based aromatic diamine, namely, 1,1-bis(4-aminophenyl)-3-pentadecylcyclohexane (BAC15) was synthesized starting from cardanol. A series of polyimides were synthesized by one-step high-temperature solution polycondensation of BAC15 with aromatic dianhydrides. Copolyimides were also synthesised by polycondensation of various compositions of BAC15 and 4,4{\textquoteright}-oxydianiline with 3,3{\textquoteright},4,4{\textquoteright}-biphenyl tetracarboxylic dianhydride. Inherent viscosities and number average molecular weights of (co)polyimides were in the range 0.33-1.4 dL/g and 14700-31900 g/mol, respectively, indicating formation of reasonably high molecular weight polymers. Polyimides were soluble in common organic solvents such as chloroform, dichloromethane and tetrahydrofuran and could be cast into transparent, flexible and tough films from their solutions in chloroform. (Co)polyimides exhibited Tg in the range 161{\textendash}254 {\textdegree}C. The lowering of Tg could be attributed to the presence of flexible pentadecyl chains which act as {\textquotedblleft}packing disruptive{\textquotedblright} groups. The temperature at 10\% weight loss (T10) of (co)polyimides was in the range 490{\textendash}515 {\textdegree}C demonstrating their good thermal stability. The virtue of solubility and large gap between Tg and T10 offers (co)polyimides opportunities of both solution as well as melt processability. Copolyimides containing pendent pentadecyl chains exhibited pretilt angle in the range 2.51-2.75{\textdegree} indicating their potential application as alignment layer in liquid crystal display devices.}, doi = {10.1680/jgrma.17.00010}, author = {Shingte, Rahul D. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.} } @article {42969, title = {Phenothiazine-based D-A-π-A dyes for highly efficient dye sensitized solar cells: effect of internal acceptor and non-conjugated π-spacer on device performance}, journal = {ChemPlusChem}, volume = {82}, year = {2017}, month = {FEB}, pages = {280-286}, abstract = {Three new D-A-pi-A metal-free organic dyes based on phenothiazine as a donor (D) and non-conjugated pi-spacer were designed and synthesized. The incorporation of different {\textquoteright}internal acceptors{\textquoteright} (electron traps) such as benzothiadiazole (BTD), benzotriazole (BTA), and pyridine were shown to allow systematic tuning of the energy levels and the photophysical properties. The AI-1 dye showed lower electronic disorder compared with the other two dyes. The efficiencies achieved with AI-1, AI-2, and AI-3 dyes were 8.5\% (J(sc) = 15.42 mA cm(-2), V-oc = 0.78 V, FF = 68\%), 7\% (J(sc) = 12.8 mA cm(-2), V-oc = 0.78 V, FF = 68\%) and 6.7\% (J(sc) = 11.57 mA cm(-2), V-oc = 0.82 V, FF = 68.26 \%), respectively. The incorporation of non-conjugated phenothiazine as a p-spacer in D-A-pi-A dyes showed remarkable enhancement in the photovoltaic performance of dye-sensitized solar cell (DSSC) devices. The sealed DSSC devices with iodide/tri-iodide (I-/I-3(-) @)based liquid electrolyte showed promising stability under ambient conditions.}, doi = {10.1002/cplu.201600492}, author = {Nagane, Satyawan and Ichake, Amol and Agrawal, Ishita and Sadhanala, Aditya and Friend, Richard H. and Ogale, Satishchandra and Wadgaonkar, Prakash P.} } @article {43666, title = {Photo-induced cytotoxicity and anti-metastatic activity of ruthenium(II)-polypyridyl complexes functionalized with tyrosine or tryptophan}, journal = {Dalton Transactions}, volume = {46}, year = {2017}, month = {MAY}, pages = {6634-6644}, abstract = {The synergistic effect of oxygen, light, and photosensitizer (PS) has found applications in medicine for the treatment of cancer through photodynamic therapy (PDT). Induction of apoptosis to cancerous cells will prevent tumor metastasis that spreads cancer cells to the neighboring organs/tissues. Herein, we report the two apoptotic Ru(II)-polypyridyl complexes that are functionalized with pendant amino acid moieties tyrosine (1) and tryptophan (2), respectively. These two water soluble complexes were found to interact strongly (K-a(1) = (1.18 +/- 0.28) x 10(5) M-1 and K-a(2) = (1.57 +/- 0.77) x 10(5) M-1) with CT-DNA. Isothermal titration calorimetry (ITC) studies revealed that these complexes bind to CT-DNA through an entropically driven process. Both the complexes showed photo-induced cytotoxicity and exhibit apoptotic activity under photo-irradiation conditions. The comet assay indicated that these complexes can damage cellular DNA, which is attributed to the significant build-up of O-1(2) level even on irradiation with low intensity light (10 J cm(-2), lambda(Range) 450-480 nm). This photoinduced DNA damage and apoptosis in A549 cells was induced by reactive oxygen species (ROS) and occurred through up-regulation of apoptotic marker caspase-3. Control experiments under dark conditions revealed an insignificant cytotoxicity towards these cells for two photosensitive molecules.}, doi = {10.1039/c7dt00670e}, author = {Ramu, Vadde and Aute, Sunil and Taye, Nandaraj and Guha, Rweetuparna and Walker, Michael G. and Mogare, Devaraj and Parulekar, Apoorva and Thomas, Jim A. and Chattopadhyay, Samit and Das, Amitava} } @article {43377, title = {Poly(ether urethane)s from aromatic diisocyanates based on lignin-derived phenolic acids}, journal = {Polymer International}, year = {2017}, month = {JAN}, doi = {10.1002/pi.5333}, author = {Kuhire, Sachin and Nagane, Samadhan S. and Wadgaonkar, Prakash} } @article {45742, title = {Ratiometric sensor for DNA based on a dual emission Ru(dppz) light-switch complex}, journal = {Dalton Transactions}, volume = {46}, year = {2017}, month = {MAY }, pages = {6079-6086}, type = {Article}, abstract = {

Herein we describe the DNA binding properties of two new water-soluble ruthenium complexes; experimental and computational data reveal that both complexes display dual emission from MLCT and LLCT excited states. The interaction of the new complexes with DNA was also investigated. Although one of the complexes only binds DNA though groove binding, the second complex has separate ligands capable of groove binding and intercalation. Nevertheless, it was found that both complexes interact with duplex DNA with high affinity. DNA induced distinctive changes in the emission of the complexes; although the groove binding complex only displays a modest increase in emission on binding, the complex that contains the intercalating Ru-II(dppz) moiety displays a large increase in MLCT-based emission on DNA binding while emission from the LLCT excited state is unaffected. This means that the complex functions as the first ratiometric sensor for DNA.

}, issn = {1477-9226}, doi = {10.1039/c7dt00801e}, author = {Walker, Michael G. and Ramu, Vadde and Meijer, Anthony J. H. M. and Das, Amitava and Thomas, Jim A.} } @article {43885, title = {Spectroscopic and reactivity comparisons of a pair of bTAML complexes with Fe-V=O and Fe-IV=O units}, journal = {Inorganic Chemistry}, volume = {56}, year = {2017}, month = {JUN}, pages = {6352-6361}, type = {Article}, abstract = {In this report we compare the geometric and electronic structures and reactivities of [Fe-V(O)](-) and [Fe-IV(O)](2-) species supported by the same ancillary nonheme biuret tetraamido macrocyclic ligand (bTAML). Resonance Raman studies show that the Fe-O vibration of the [Fe-IV(O)](2-) complex 2 is at 798 cm(-1), compared to 862 cm(-1) for the corresponding [Fe-V(O)](-) species 3, a 64 cm(-1) frequency difference reasonably reproduced by density functional theory calculations. These values are, respectively, the lowest and the highest frequencies observed thus far for nonheme high-valent Fe-O complexes. Extended X-ray absorption fine structure analysis of 3 reveals an Fe-O bond length of 1.59 angstrom, which is 0.05 angstrom shorter than that found in complex 2. The redox potentials of 2 and 3 are 0.44 V (measured at pH 12) and 1.19 V (measured at pH 7) versus normal hydrogen electrode, respectively, corresponding to the [Fe-IV(O)](2-)/[Fe-III(OH)](2-) and [Fe-V(O)](-)/[Fe-IV(O)](2-) couples. Consistent with its higher potential (even after correcting for the pH difference), 3 oxidizes benzyl alcohol at pH 7 with a second-order rate constant that is 2500-fold bigger than that for 2 at pH 12. Furthermore, 2 exhibits a classical kinteic isotope effect (KIE) of 3 in the oxidation of benzyl alcohol to benzaldehyde versus a nonclassical KIE of 12 for 3, emphasizing the reactivity differences between 2 and 3.}, doi = {10.1021/acs.inorgchem.7b00448}, author = {Pattanayak, Santanu and Jasniewsk, Andrew J. and Rana, Atanu and Draksharapu, Apparao and Singh, Kundan K. and Weitz, Andrew and Hendrich, Michael and Que, Lawrence, Jr. and Dey, Abhishek and Sen Gupta, Sayam} } @inbook {44022, title = {Step-growth polymers from cashew nut shell liquid (CNSL)-based aromatic difunctional monomers}, booktitle = {Cashew Nut Shell Liquid}, year = {2017}, pages = {163-214}, abstract = {

Cashew nut shell liquid (CNSL) is an attractive renewable resource material which is available in abundance (44,50,000 tonnes worldwide and 7,53,000 tonnes in India in 2013) at low cost (around 0.27 $/kg in 2015) and is mainly composed of anacardic acid, cardanol, cardol and 2-methyl cardol. Cardanol is obtained as a major product during hot oil extraction or roasting process of CNSL. Cardanol possesses interesting structural features. The aromatic ring of cardanol can undergo electrophilic substitution reactions; the unsaturated side chain can undergo epoxidation, hydrogenation, metathesis, etc., while the phenolic hydroxyl group can undergo various reactions such as esterification and alkylation. Such opportunities of chemical modifications offered by cardanol have been extensively explored to synthesise a range of interesting aromatic difunctional monomers that have subsequently been utilised to prepare a host of step-growth polymers. Summarised herein are research efforts that have contributed towards the synthesis of step-growth polymers based on aromatic difunctional monomers derived from cardanol. The properties of high-performance polymers, with a particular focus on processability and thermal characteristics, are highlighted.

}, doi = {10.1007/978-3-319-47455-7_9}, author = {Chatterjee, Deepshikha and Sadavarte, Nilakshi V. and Shingte, Rahul D. and More, Arvind S. and Tawade, Bhausaheb V. and Kulkarni, Arun D. and Ichake, Amol B. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article {45675, title = {Structure and short time degradation studies of sodium zirconium phosphate ceramics loaded with simulated fast breeder (FBR) waste}, journal = {Journal of Nuclear Materials}, volume = {487 }, year = {2017}, month = {APR}, pages = {5-12}, type = {Article}, abstract = {Sodium zirconium phosphate (NZP) ceramics have been prepared using conventional sintering and hot isostatic pressing (HIP) routes. The structure of NZP ceramics, prepared using the HIP route, has been compared with conventionally sintered NZP using a combination of X-ray diffraction (XRD) and (P-31 and Na-23) nuclear magnetic resonance (NMR) spectroscopy techniques. It is observed that NZP with no waste loading is aggressive toward the steel HIP -can during hot isostatic compaction and significant fraction of cations from the steel enter the ceramic material. Waste loaded NZP samples (10 wt\% simulated FBR waste) show significantly low can -interaction and primary NZP phase is evident in this material. Upon exposure of can -interacted and waste loaded NZP to boiling water and steam, P-31 NMR does not detect any major modifications in the network structure. However, the Na-23 NMR spectra indicate migration of Na+ ions from the surface and possible re -crystallization. This is corroborated by Small -Angle Neutron Scattering (SANS) data and Scanning Electron Microscopy (SEM) measurements carried out on these samples.}, doi = {10.1016/j.jnucmat.2017.01.054}, author = {Ananthanarayanan, A. and Ambashta, R. D. and Sudarsan, V. and Ajithkumar, T. and Sen, D. and Mazumder, S. and Wattal, P. K.} } @article {44142, title = {Study on doped heterojunctions in TiO2 nanotubes: an efficient photocatalyst for solar water splitting}, journal = {Scientific Reports}, volume = {7}, year = {2017}, month = {OCT}, pages = {Article Number: 14314}, type = {Article}, abstract = {The two important factors that affect sunlight assisted water splitting ability of TiO2 are its charge recombination and large band gap. We report the first demonstration of nitrogen doped triphase (anatase-rutile-brookite) TiO2 nanotubes as sun light active photocatalyst for water splitting with high quantum efficiency. Nitrogen doped triphase TiO2 nanotubes, corresponding to different nitrogen concentrations, are synthesized electrochemically. Increase in nitrogen concentration in triphase TiO2 nanotubes is found to induce brookite to anatase phase transformation. The variation in density of intra-band states (Ti3+ and N 2p states) with increase in nitrogen doping are found to be critical in tuning the photocatalytic activity of TiO2 nanotubes. The presence of bulk heterojunctions in single nanotube of different nitrogen doped TiO2 samples is confirmed from HRTEM analysis. The most active nitrogen doped triphase TiO2 nanotubes are found to be 12 times efficient compared to pristine triphase TiO2, for solar hydrogen generation. The band alignment and charge transfer pathways in nitrogen doped TiO2 with triphase heterojunctions are delineated. Bulk heterojunctions among the three phases present in the nanotubes with intra-band defect states is shown to enhance the photocatalytic activity tremendously. Our study also confirms the theory that three phase system is efficient in photocatalysis compared to two phase system.}, doi = {10.1038/s41598-017-14463-0}, author = {Preethi, L. K. and Antony, Rajini P. and Mathews, Tom and Walczak, Lukasz and Gopinath, Chinnakonda S.} } @article {43500, title = {Sulfamic acid-catalyzed, environmentally benign synthesis of bis-tetronic acids at ambient temperature}, journal = {Research on Chemical Intermediates}, volume = {43}, year = {2017}, month = {JAN}, pages = {141-152}, abstract = {An enviro-economic protocol has been described for the synthesis of bis-tetronic acids by pseudo-three-component condensation between aldehydes/isatins and tetronic acid using sulfamic acid as a solid acid catalyst. Easy commercial availability of the catalyst at extremely low cost, excellent yields and avoidance of conventional purification procedures are the main merits of this energy efficient protocol.}, doi = {10.1007/s11164-016-2611-y}, author = {Pandit, Kapil S. and Desai, Uday V. and Wadgaonkar, Prakash P. and Kodam, Kisan M.} } @article {42973, title = {Synthesis and characterization of polyhydrazides and poly(1,3,4-oxadiazole)s containing multiple arylene ether linkages and pendent pentadecyl chains}, journal = {High Performance Polymers}, volume = {29}, year = {2017}, month = {SEP}, chapter = {836-848}, abstract = {

A new diacylhydrazide monomer, namely, 4-(4-(4-(4-(hydrazinocarbonyl)phenoxy)-2-pentadecylphenoxy)phenoxy) benzohydrazide (HPPDPB), was synthesized starting from 4-(4-hydroxyphenoxy)-3-pentadecylphenol. HPPDPB was polycondensed with terephthalic acid chloride (TPC), isophthalic acid chloride (IPC) and a mixture of TPC and IPC (50:50 mol\%) to obtain polyhydrazides containing multiple arylene ether linkages in the backbone and pendent pentadecyl chains. Polyhydrazides were subsequently cyclized in the presence of phosphorus oxychloride to obtain the corresponding poly(1,3,4-oxadiazole)s. Polyhydrazides and poly(1,3,4-oxadiazole)s exhibited inherent viscosities in the range 0.65{\textendash}0.72 dL g-1 and 0.54{\textendash}0.62 dL g-1, respectively, which indicated the formation of reasonably high-molecular weight polymers. Polyhydrazides were soluble in polar aprotic solvents such as N,N-dimethylformamide, N,N-dimethylacetamide (DMAc), 1-methyl-2-pyrrolidinone and pyridine whereas poly(1,3,4-oxadiazole)s exhibited excellent solubility even in common organic solvents such as chloroform, dichloromethane and tetrahydrofuran. Tough, transparent and flexible films of polyhydrazides and poly(1,3,4-oxadiazole)s could be cast from DMAc and chloroform solutions, respectively. X-Ray diffraction studies revealed amorphous nature of polyhydrazides and poly(1,3,4-oxadiazole)s and the formation of layered structure was observed due to ordered packing of pentadecyl chains. The 10\% decomposition temperature (T 10) values for poly(1,3,4-oxadiazole)s were in the range 425{\textendash}440{\textdegree}C indicating their good thermal stability. Glass transition temperature (T g) values of polyhydrazides and poly(1,3,4-oxadiazole)s were in the range 175{\textendash}192{\textdegree}C and 92{\textendash}103{\textdegree}C, respectively. The excellent solubility characteristics and the large gap between T g (92{\textendash}103{\textdegree}C) and T 10 (425{\textendash}440{\textdegree}C) values give poly(1,3,4-oxadiazole)-containing pendent pentadecyl chains better opportunities for processability.

}, doi = {10.1177/0954008316660368}, author = {Tawade, Bhausaheb V. and Valsange, Nitin G. and Wadgaonkar, Prakash P.} } @article {43686, title = {Synthesis of gamma-WO3 thin films by hot wire-CVD and investigation of its humidity sensing properties}, journal = {Physica Status Solidi A-Applications and Materials Science}, volume = {214}, year = {2017}, month = {MAY}, pages = {Article Number: 1600717}, type = {Article}, abstract = {In this study, monoclinic tungsten oxide (gamma-WO3) have been grown in a single step using HW-CVD method by resistively heating W filaments in a constant O-2 pressure. The formation of gamma-WO3 was confirmed using low angle-XRD and Raman spectroscopy analysis. Low angle-XRD analysis revealed that as-deposited WO3 film are highly crystalline and the crystallites have preferred orientation along the (002) direction. HRTEM analysis and SAED pattern also show the highly crystalline nature of WO3 with d spacing of similar to 0.38 nm, having an orientation along the (002) direction. Surface topography investigated by SEM analysis shows the formation of a uniform and homogeneous cauliflower like morphology throughout the substrate surface without flaws and cracks. A humidity sensing device incorporating WO3 is also fabricated, which shows a maximum humidity sensitivity factor of similar to 3954\% along with a response time of similar to 14 s and a recovery time of similar to 25 s. The obtained results demonstrate that it is possible to synthesize WO3 in a single step by HW-CVD method and to fabricate a humidity sensor by using it. (C) 2017 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim}, doi = {10.1002/pssa.201600717}, author = {Jadkar, Vijaya and Pawbake, Amit and Waykar, Ravindra and Jadhavar, Ashok and Date, Abhijit and Late, Dattatray and Pathan, Habib and Gosavi, Suresh and Jadkar, Sandesh} } @article {44033, title = {Synthesis of orthorhombic-molybdenum trioxide (α-MoO3) thin films by hot wire-CVD and investigations of its humidity sensing properties}, journal = {Journal of Materials Science Materials in Electronics}, volume = {1}, year = {2017}, month = {JUL}, type = {Article}, abstract = {In present work, we report synthesis of orthorhombic-molybdenum trioxide (α-MoO 3) thin films using home-build hot wire-CVD (HW-CVD) method simply by heating the Mo filament in a controlled O 2 atmosphere. The formation of α-MoO 3 was confirmed by low angle-XRD and Raman spectroscopy. Low angle-XRD analysis revealed that α-MoO 3 crystallites have orientations along (110), (101) and (111) directions while Raman spectroscopy analysis shows two prominent vibrational modes ~819 and ~994 cm -1 associated with Mo 2{\textendash}O and Mo=O respectively. SEM and TEM analysis show the formation of nano-sheets like morphology of α-MoO 3 thin films. The SAED pattern shows highly crystalline nature of α-MoO 3. The humidity-sensing properties were investigated at room temperature by fabricating the two probe device. The humidity sensing results showed n-type behavior of α-MoO 3. The maximum humidity sensitivity of ~6957\% along with response time of ~66 s and recovery time of ~5 s were observed for α-MoO 3 thin film humidity sensor device. Our results have opened up a new avenue to grow α-MoO 3 for humidity sensor applications.}, doi = {10.1007/s10854-017-7473-6}, author = {Jadkar, Vijaya and Pawbake, Amit S. and Waykar,Ravindra G. and Jadhavar, Ashok Arjun and Mayabadi, Azam and Date, Abhijit and Late, Dattatray J. and Pathan, Habib M. and Gosavi, Suresh W. and Jadkar, Sandesh R.} } @article {43375, title = {Temperature and pH dual stimuli responsive PCL- b -PNIPAAm block copolymer assemblies and the cargo release studies}, journal = {Journal of Polymer Science Part A Polymer Chemistry}, volume = {55}, year = {2017}, month = {FEB}, pages = {1383-1396}, type = {Article}, chapter = {1383-1396}, abstract = {A new atom transfer radical polymerization (ATRP) initiator, namely, 2-(1-(2-azidoethoxy)ethoxy)ethyl 2-bromo-2-methylpropanoate containing both {\textquotedblleft}cleavable{\textquotedblright} acetal linkage and {\textquotedblleft}clickable{\textquotedblright} azido group was synthesized. Well-defined azido-terminated poly(N-isopropylacrylamide)s (PNIPAAm-N3)s with molecular weights and dispersity in the range 11,000{\textendash}19,000 g mol-1 and 1.20{\textendash}1.28, respectively, were synthesized employing the initiator by ATRP. Acetal containing PCL-b-PNIPAAm block copolymer was obtained by alkyne{\textendash}azide click reaction of azido-terminated PNIPAAm-N3 with propargyl-terminated PCL. Critical aggregation concentration (CAC) of PCL-b-PNIPAAm copolymer in aqueous solution was found to be 8.99 {\texttimes} 10-6 M. Lower critical solution temperature (LCST) of PCL-b-PNIPAAm copolymer was found to be 32 {\textdegree}C which was lower than that of the precursor PNIPAAm-N3 (36.4 {\textdegree}C). The effect of dual stimuli viz. temperature and pH on size and morphology of the assemblies of PCL-b-PNIPAAm block copolymer revealed that the copolymer below LCST assembled in spherical micelles which subsequently transformed to unstable vesicles above the LCST. Heating these assemblies above 40 {\textdegree}C led to the precipitation of PCL-b-PNIPAAm block copolymer. Whereas, at decreased pH, micelles of PCL-b-PNIPAAm copolymer disintegrate due to the cleavage of acetal linkage and precipitation of hydrophobic hydroxyl-terminated PCL. The encapsulated pyrene release kinetics from the micelles of synthesized PCL-b-PNIPAAm copolymer was found to be faster at higher temperature and at lower pH. {\textcopyright} 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017}, doi = {10.1002/pola.28508}, author = {Patil, Sachin S. and Wadgaonkar, Prakash} } @article {43342, title = {Thermo-reversible sol-gel transition of aqueous solutions of patchy polymers}, journal = {RSC Advances}, volume = {7}, year = {2017}, month = {JAN}, pages = {5101-5110}, abstract = {While aqueous solutions of several amphiphilic thermo-reversible polymers show gelation upon heating, there are fewer examples of polymer solutions that exhibit gelation when cooled. This paper reports an interesting phenomenon of abrupt thermoreversible gelation of aqueous solutions of a hydrophobically modified polymer upon cooling. A high molecular weight precursor copolymer (PCP, (M-w) over bar approximate to 5 x 10(6) g mol(-1)) of N, N-dimethylacrylamide (70 mol\%) and acrylic acid (30 mol\%) was modified by reacting 10 mol\% of the acrylic acid groups with n-dodecyl amine to form a hydrophobically modified copolymer (HMCP). The composition of the copolymer was ascertained using NMR spectroscopy. Cooling the solution of PCP at a controlled rate resulted in a gradual increase in its low shear viscosity as dictated by the flow activation energy. In contrast, cooling the solution of HMCP under identical conditions resulted in an abrupt and large non-Arrhenius increase in viscosity at a specific transition temperature, which decreased with decrease in polymer concentration. Fluorescence measurements and dynamic light scattering data showed that abrupt gelation happened upon cooling, when polymer coils percolate accompanied with concomitant transition in chain conformation from compact micellar coils formed by intra-chain hydrophobic associations to swollen polymer coils connected by inter-chain hydrophobic interactions.}, doi = {10.1039/c6ra27030a}, author = {Parmar, Indravadan A. and Shedge, Aarti S. and Badiger, Manohar V. and Wadgaonkar, Prakash P. and Lele, Ashish K.} } @article {43936, title = {Vitro study of novel microparticle based silk fibroin scaffold with osteoblast-like cells for load-bearing osteo-regenerative applications}, journal = {RSC Advances}, volume = {7}, year = {2017}, month = {MAY}, pages = {26551 - 26558}, type = {Article}, abstract = {Silk Fibroin (SF) is today considered to be one of the most favorable materials for bone tissue engineering. We have prepared novel SF microparticle based 3D scaffolds, with appropriate pore size, pore interconnectivity and porosity, excellent mechanical properties and tunable bioresorption, while retaining the inherent biocompatibility of SF. These properties make them ideal candidates for osteoregenerative applications. Here, we report the in vitro cell viability, cell adhesion and proliferation with osetoblastic differentiation of MG 63 osteoblast-like cell line on these scaffolds. In addition, we have also modified the surface of these scaffolds using collagen type I and chitosan biopolymers. Our results show that although the SF scaffold does support in vitro cell attachment, proliferation and differentiation, this performance can be further enhanced using the surface coating approach. Also, the ALP activity and bone mineralization was found to be particularly superior in the chitosan modified scaffolds.}, doi = {10.1039/c7ra03288a}, author = {Parekh, Nimisha Anant and Hushye, Chandni and Warunkar, Saniya and Gupta, Sayam Sen and Nisal, Anuya} } @article {44385, title = {Advanced glycation end products modulate amyloidogenic APP processing and tau phosphorylation: a mechanistic link between glycation and the development of alzheimer{\textquoteright}s disease}, journal = {ACS Chemical Neuroscience}, volume = {9}, year = {2018}, month = {MAY}, pages = {988-1000}, abstract = {Advanced glycation end products (AGEs) are implicated in the pathology of Alzheimer{\textquoteright}s disease (AD), as they induce neurodegeneration following interaction with the receptor for AGE (RAGE). This study aimed to establish a mechanistic link between AGE-RAGE signaling and AD pathology. AGE-induced changes in the neuro2a proteome were monitored by SWATH-MS. Western blotting and cell-based reporter assays were used to investigate AGE-RAGE regulated APP processing and tau phosphorylation in primary cortical neurons. Selected protein expression was validated in brain samples affected by AD. The AGE-RAGE axis altered proteome included increased expression of cathepsin B and asparagine endopeptidase (AEP), which mediated an increase in A beta(1-)(42) formation and tau phosphorylation, respectively. Elevated cathepsin B, AEP, RAGE, and pTau levels were found in human AD brain, coincident with enhanced AGEs. This study demonstrates that the AGE-RAGE axis regulates A beta(1-)(42) formation and tau phosphorylation via increased cathepsin B and AEP, providing a new molecular link between AGEs and AD pathology.}, doi = {10.1021/acschemneuro.7b00410}, author = {Batkulwar, Kedar and Godbole, Rashmi and Banarjee, Reema and Kassaar, Omar and Williams, Robert J. and Kulkarni, Mahesh J.} } @article {44646, title = {Calixarene intercalated NiCo layered double hydroxide for enhanced oxygen evolution catalysis}, journal = {ACS Sustainable Chemistry \& Engineering}, volume = {6}, year = {2018}, month = {AUG}, pages = {9649-9660}, abstract = {

Water splitting provides a promising, sustainable way to resolve problems arising due to depleting fossil fuels. The success needs development of low-cost and high-performance electrode materials. The oxygen evolution reaction (OER) is a crucial reaction in water splitting. The combined Ni and Co oxide developed nanostructures having a small overpotential and fast kinetics of OER. They have drawn considerable attention, because of their theoretically high efficiency, high abundance, low cost, and environmental benignity in comparison with precious metal oxides, such as RuO2 and IrO2. However, the desired efficiency needs the developments of enhanced specific active area and conductivity. In the present communication, we address these issues. Specifically, exfoliation of layer double hydroxide (LDH) is applied to enhance the active surface area. The study reveals that intercalation by calixarene in NiCo LDH affords a multifunctional interlayer to deliver a large active surface area and fast electron transport toward the carbon nano-onion (CNO) support. It favorably lowers the overpotentials in OER (290 mV) and attains Tafel slope of 31 mV/decade. Enhanced conductivity is achieved using CNO as a support for the calixarene intercalated NiCo LDH. These developments offer a synergistic effect in achieving superior electrocatalytic activity for OER. This work gives insight into designing binder-free electrodes in alkaline media with good stability for advanced OER activity.

}, keywords = {Calixarene, electrocatalyst, Exfoliation, NiCo LDH, Oxygen Evolution Reaction}, issn = {2168-0485}, doi = {10.1021/acssuschemeng.7b04788}, author = {Waghmode, Babasaheb J. and Gaikwad, Aarti P. and Rode, V, Chandrashekhar and Sathaye, Shivaram D. and Patil, Kashinath R. and Malkhede, Dipalee D.} } @article {44198, title = {Catalyst-free oxidation of sulfides to sulfoxides and diethylamine catalyzed oxidation of sulfides to sulfones using Oxone as an oxidant (vol 43, pg 6875, 2017)}, journal = {Research on Chemical Intermediates}, volume = {44}, year = {2018}, month = {FEB}, pages = {1437}, type = {Article}, issn = {0922-6168}, doi = {10.1007/s11164-017-3137-7}, author = {Kupwade, R. V. and Khot, S. S. and Lad, U. P. and Desai, U. V. and Wadgaonkar, P. P.} } @article {45430, title = {CSGID solves structures and identifies phenotypes for five enzymes in toxoplasma gondii}, journal = {Frontiers in Cellular and Infection Microbiology}, volume = {8}, year = {2018}, month = {OCT}, type = {Article}, abstract = {

Toxoplasma gondii, an Apicomplexan parasite, causes significant morbidity and mortality, including severe disease in immunocompromised hosts and devastating congenital disease, with no effective treatment for the bradyzoite stage. To address this, we used the Tropical Disease Research database, crystallography, molecular modeling, and antisense to identify and characterize a range of potential therapeutic targets for toxoplasmosis. Phosphoglycerate mutase II (PGMII), nucleoside diphosphate kinase (NDK), ribulose phosphate 3-epimerase (RPE), ribose-5-phosphate isomerase (RPI), and ornithine aminotransferase (OAT) were structurally characterized. Crystallography revealed insights into the overall structure, protein oligomeric states and molecular details of active sites important for ligand recognition. Literature and molecular modeling suggested potential inhibitors and druggability. The targets were further studied with vivoPMO to interrupt enzyme synthesis, identifying the targets as potentially important to parasitic replication and, therefore, of therapeutic interest. Targeted vivoPMO resulted in statistically significant perturbation of parasite replication without concomitant host cell toxicity, consistent with a previous CRISPR/Cas9 screen showing PGM, RPE, and RPI contribute to parasite fitness. PGM, RPE, and RPI have the greatest promise for affecting replication in tachyzoites. These targets are shared between other medically important parasites and may have wider therapeutic potential.

}, issn = { 2235-2988}, doi = {10.3389/fcimb.2018.00352}, author = {Lykins, Joseph D. and Filippova, Ekaterina V and Halavaty, Andrei S. and Minasov, George and Zhou, Ying and Dubrovska, Ievgeniia and Flores, Kristin J. and Shuvalova, Ludmilla A. and Ruan, Jiapeng and El Bissati, Kamal and Dovgin, Sarah and Roberts, Craig W. and Woods, Stuart and Moulton, Jon D. and Moulton, Hong and Mcphillie, Martin J. and Muench, Stephen P. and Fishwick, Colin W. G. and Sabini, Elisabetta and Shanmugam, Dhanasekaran and Roos, David S. and Mcleod, Rima and Anderson, Wayne F. and Ngo, Huan M.} } @article {44449, title = {Design and development of a test rig to investigate the load deflection characteristics of helical spring lock washers}, journal = {International Journal of Structural Integrity}, volume = {9}, year = {2018}, month = {MAR}, abstract = {Purpose The helical spring lock washer is a part of nut-bolt joint assembly used in different industries like automobile, aerospace, mechanical, chemical, electrical, electronics, etc. It works as a part of temporary joint and plays important role in loosening behavior of assembly under dynamic (vibrations) conditions. Thus, it is necessary to investigate the performance of helical spring lock washer under different controlled operating conditions in order to satisfy its functional requirement. Design/methodology/approach In the present investigation, a novel test rig is designed and developed to determine the load deflection characteristics of helical spring lock washers. The test rig facilitates the controlled linear displacement of the Helical Spring Lock (HSL) washer with predetermined angular rotation of the handle gives the corresponding reaction load on the display. Additionally, the repeatability and reproducibility of the test rig was carried out. Findings The newly designed and developed test rig is enough capable to differentiate the load deflection characteristics during compressive loading and unloading of helical spring lock washers. Additionally, the loss of strain energy can be determined from the load deflection characteristics of helical spring lock washer. Originality/value The present test rig is designed and developed to investigate the load deflection characteristics under compressive loading and unloading of Helical spring lock washer. The test rig has least count of 0.4905N for load measurement and 0.01389 mm for linear displacement.}, doi = {10.1108/IJSI-11-2017-0062}, author = {Wagh, Hemant and Desale, Girish R.} } @article {44451, title = {Design and synthesis of 2-amino-thiophene-tethered ureidopenicillin analogs with potentantibacterial and antitubercular activity}, journal = {ChemistrySelect}, volume = {3}, year = {2018}, month = {MAR}, pages = {3122-3126}, abstract = {Ureidopenicillins are a class of penicillins which are antibiotics active against gram-negative bacteria. Herein, we report the synthesis of 2-aminothiophene-tethered ureidopenicillin analogues and their in vitro antibacterial and antitubercular activity. Intriguingly, unlike the reported ureidopenicillins which are active against gram-negative bacteria, the synthesised 2-aminothiophene-tethered ureidopenicillins were significantly active against Gram-positive bacterial strains and showed moderate inhibition towards gram-negative bacterial strains. Among all the analogs, compound 1b containing 2-aminothiophene moiety with minimum inhibitory concentration (MIC): 0.29, 0.32, > 10, > 10 mg/ml for Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa, respectively, showed better anti-bacterial profile as compared to cephalexin and equipotent to ampicillin and amoxicillin on gram-positive bacterial strains. All the derivatives were also screened for anti-TB activity against mycobacterium tuberculosis H37Ra. Among the series, cycloocta-thiophene-tethered cephalexin analog 3c displayed excellent antitubercular activity with MIC values 0.78 mg/ml. Low cytotoxicity and high selectivity index indicate the efficacy of 3c against mycobacterial infections. The results from present study offer a novel approach to modify the existing drug class of ureidopenicillins to yield antimicrobials with promising utility.}, doi = {10.1002/slct.201800027}, author = {Wagh, Mahendra A. and Baravkar, Sachin B. and Jedhe, Ganesh S. and Borkute, Rachna and Choudhari, Amit S. and Sarkar, Dhiman and Sanjayan, Gangadhar J.} } @article {44584, title = {Design, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {56}, year = {2018}, month = {AUG}, pages = {1721-1729}, abstract = {Film-forming polymers containing ionic groups have attracted considerable attention as emerging materials for gas separation applications. The aim of this article was to synthesize new film-forming polyimides containing imidazolium groups (PI-IMs) and establish their structure-performance relationship. In this context, a new aromatic diamine, namely, N-1-(4-aminophenyl)-N-1-(4-(2-phenyl-1H-imidazol-1-yl)phenyl)benzene-1,4-diamine (ImTPADA), was synthesized and polycondensed with three aromatic dianhydrides, namely, 4,4-(hexafluoroisopropylidene)diphthalic anhydride, 4,4-(4,4-isopropylidenediphenoxy) bis(phthalic anhydride), and 4,4-oxydiphthalic anhydride to form the corresponding polyimides containing pendent 2-phenylimidazole groups (PI-IEs). Next, PI-IMs were prepared by N-quaternization of pendent 2-phenylimidazole groups present in PI-6FDA using methyl iodide followed by anion exchange with bis(trifluoromethane)sulfonimide lithium salt (LiTf2N). PI-IEs and PI-IMs exhibited reasonably high molecular weights, amorphous nature, good solubility, and could be cast into self-standing films from their DMAc solutions. Thermogravimetric analysis showed that 10\% weight loss temperature of PI-IEs and PI-IMs were in the range 545-475 degrees C and 303-306 degrees C, respectively. Gas permeability analysis of films of PI-IEs and PI-IMs was investigated by variable-volume method and it was observed that incorporation of ionic groups into PI-6FDA resulted in increased permeability while maintaining selectivity. In particular, polymer bearing Tf2N- anion exhibited high CO2 permeability (33.3 Barr) and high selectivity for CO2/CH4 (41.1) and CO2/N-2 (35.4). (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1721-1729}, doi = {10.1002/pola.29053}, author = {Shrimant, Bharat and Kharul, Ulhas K. and Wadgaonkar, Prakash P.} } @article {44200, title = {Electrospinning of non-ionic cellulose ethers/polyvinyl alcohol nanofibers: characterization and applications}, journal = {Carbohydrate Polymers}, volume = {181}, year = {2018}, month = {FEB }, pages = {175-182}, type = {Article}, abstract = {

The morphology of spin-coated films and electrospun fibers of ethyl hydroxy ethyl cellulose (EHEC), hydrophobically modified ethyl hydroxy ethyl cellulose (HM-EHEC) and their blends with Poly(vinyl alcohol) (PVA) was examined by AFM, SEM and contact angle measurements. These polysaccharides upon blending with PVA exhibited smooth surface which was evidenced by Atomic Force Microscopy (AFM) observation. The electrospinnability of above polysaccharides with PVA was demonstrated for the first time. The oriented fibers could be obtained using a rotating disc collector. Contact angles of spin-coated films and electrospun fibers were discussed in terms of hydrophobicity and wetting characteristics. Further, The nanofibers of EHEC/PVA were in-situ crosslinked using citric acid and were used for controlled release of an antibacterial drug, Chlorhexidine Digluconate (ChD). In-vitro studies of cytotoxicity, cell growth and cell proliferation were performed using L929 mouse fibroblast cells. These nanofiber mats show potential in drug delivery and as scaffolds in tissue engineering applications.

}, keywords = {cellulose, drug delivery, electrospinning, Ethyl hydroxy ethyl cellulose, Hydrophobically modified ethyl hydroxy ethyl, scaffold, Spin coating}, issn = {0144-8617}, doi = {10.1016/j.carbpol.2017.10.070}, author = {Wali, Ashwini and Zhang, Yucheng and Sengupta, Poulomi and Higaki, Yuji and Takahara, Atsushi and Badiger, Manohar V.} } @article {43992, title = {Erratum to: catalyst-free oxidation of sulfides to sulfoxides and diethylamine catalyzed oxidation of sulfides to sulfones using oxone as an oxidant}, journal = {Research on Chemical Intermediates}, volume = {44}, year = {2018}, month = {FEB}, pages = {1437{\textendash}1437}, type = {Journal Article}, abstract = {

We describe here our journey from the failure of our attempts in controlled oxidation of sulfides to sulfoxides using an Oxone{\textregistered}{\textendash}KBr combination to our success in the development of a catalyst-free protocol for the oxidation of sulfides to sulfoxides using Oxone as an oxidant. We also describe the failure of our attempts at the oxidation of sulfides to sulfones using an excess of Oxone{\textendash}KBr as well as Oxone, and our success towards the development of a rapid, scalable and chromatography-free protocol for the oxidation of sulfides to sulfones using diethylamine{\textendash}Oxone as an unprecedented catalyst{\textendash}oxidant combination.

}, keywords = {diethylamine, organocatalysis, Oxidation, Oxone, Sulfones, Sulfoxides}, doi = {10.1007/s11164-017-3137-7}, author = {Kupwade, R. V.}, editor = {Khot, S. S.} } @article {45492, title = {Evaluation of humidity sensor based on PVP-RGO nanocomposites}, journal = {IEEE sensors journal }, volume = {18}, year = {2018}, month = {NOV}, pages = {9097-9104}, type = {Article }, abstract = {

his paper describes the humidity sensing properties of one step in situ synthesized poly (N-vinyl pyrrolidone)- reduced graphene oxide (PVP-RGO) nanocomposites. Different PVP-RGO nanocomposites were obtained by varying PVP/GO weight \%ratio as x/50 mg, wherein x = 25, 50, and 75 mg, respectively. The real-time adsorption kinetics of the water molecules during the humidity sensing were also discussed using Elovich model, pseudo first and second order equations. The increase in humidity response of 1.5 PVP-RGO nanocomposite is attributed to the presence of large amount of oxygen functionalities. The above observation was corroborated using spectroscopic analysis. The optimized PVP-RGO nanocomposite showed faster response kinetics with response and recovery times of 10 and 20 s, respectively. The present humidity sensor shows remarkable linearity over the range of 20-90\%RH. More specifically, sensitivity was correlated with oxygen functionalities created due to variation of PVP during the functionalization of RGO nanosheets.

}, issn = { 1530-437X}, doi = {10.1109/JSEN.2018.2870324}, author = {Bhangare, Bhagyashri and Jagtap, Shweta and Ramgir, Niranjan and Waichal, Rupali and Muthe, K. P. and Gupta, S. K. and Gadkari, Sanjay C. and Aswal, D. K. and Gosavi, Suresh} } @article {44357, title = {Favorable 2 {\textquoteright}-substitution in the loop region of a thrombin-binding DNA aptamer}, journal = {Bioorganic \& Medicinal Chemistry Letters}, volume = {28}, year = {2018}, month = {JUN}, pages = {1765-1768}, type = {Article}, abstract = {Simple 2{\textquoteright}-OMe-chemical modification in the loop region of the 15mer G-rich DNA sequence GGTTGGTGTGGTTGG is reported. The G-quadruplex structure of this thrombin-binding aptamer (TBA), is stabilized by single modifications (T -> 2{\textquoteright}-OMe-U), depending on the position of the modification. The structural stability also renders significantly increased inhibition of thrombin-induced fibrin polymerization, a process closely associated with blood-clotting. (C) 2018 Elsevier Ltd. All rights reserved.}, doi = {10.1016/j.bmcl.2018.04.027}, author = {Awachat, Ragini and Wagh, Atish A. and Aher, Manisha and Fernandes, Moneesha and Kumar, Vaijayanti A.} } @article {45401, title = {From a helix to a small cycle: metadynamics-inspired alpha v beta 6 integrin selective ligands}, journal = {Angewandte Chemie-International Edition}, volume = {57}, year = {2018}, month = {OCT}, pages = {14645-14649}, type = {Article}, abstract = {The RGD-recognizing alpha v beta 6 integrin has only recently emerged as a major target for cancer diagnosis and therapy. Thus, the development of selective, low-molecular-weight ligands of this receptor is still in great demand. Here, a metadynamics-driven design strategy allowed us to successfully convert a helical nonapeptide into a cyclic pentapeptide (6) showing remarkable potency and alpha v beta 6 specificity. NMR and docking studies elucidated the reasons for the high affinity and selectivity of this compound, setting the ground for the rational design of new alpha v beta 6-specific small peptides or even peptidomimetics. In vivo PET imaging studies demonstrated the potential use of 6 for medical applications.}, issn = { 1433-7851}, doi = {10.1002/anie.201803250}, author = {Di Leva, Francesco Saverio and Tomassi, Stefano and Di Maro, Salvatore and Reichart, Florian and Notni, Johannes and Dangi, Abha and Marelli, Udaya Kiran and Brancaccio, Diego and Merlino, Francesco and Wester, Hans-Juergen and Novellino, Ettore and Kessler, Horst and Marinelli, Luciana} } @article {45447, title = { Glucose isomerization catalyzed by bone char and the selective production of 5-hydroxymethylfurfural in aqueous media}, journal = {Sustainable Energy \& Fuels}, volume = {2}, year = {2018}, month = {OCT}, pages = { 2148-2153}, type = {Article}, abstract = {The selective production of 5-hydroxymethylfurfural (HMF) is important, and it is difficult with glucose substrates in a water solvent. Here we demonstrate a selective method for glucose-to-HMF conversion using the combined catalysis of bone char and 1-methyl-3-(3-sulfopropyl)-imidazolium hydrogen sulfate acidic ionic liquid catalysts with a high HMF selectivity (54\%) in water.}, issn = {2398-4902}, doi = {10.1039/c8se00339d}, author = {Matsagar, Babasaheb M. and Van Nguyen, Chi and Hossain, Md. Shahriar A. and Islam, Md. Tofazzal and Yamauchi, Yusuke and Dhepe, Paresh L. and Wu, Kevin C. -W.} } @article {45446, title = { Glycolysis is important for optimal asexual growth and formation of mature tissue cysts by Toxoplasma gondii}, journal = {International Journal for Parasitology }, volume = {48}, year = {2018}, month = {OCT}, pages = {955-968}, type = {Article}, abstract = {Toxoplasma gondii can grow and replicate using either glucose or glutamine as the major carbon source. Here, we have studied the essentiality of glycolysis in the tachyzoite and bradyzoite stages of T. gondii, using transgenic parasites that lack a functional hexokinase gene (Delta hk) in RH (Type-1) and Prugniaud (Type-II) strain parasites. Tachyzoite stage 411k parasites exhibit a fitness defect similar to that reported previously for the major glucose transporter mutant, and remain virulent in mice. However, although Prugniaud strain Delta hk tachyzoites were capable of transforming into bradyzoites in vitro, they were severely compromised in their ability to make mature bradyzoite cysts in the brain tissue of mice. Isotopic labelling studies reveal that glucose-deprived tacyzoites utilise glutamine to replenish glycolytic and pentose phosphate pathway intermediates via gluconeogenesis. Interestingly, while glutaminedeprived intracellular Delta hk tachyzoites continued to replicate, extracellular parasites were unable to efficiently invade host cells. Further, studies on mutant tachyzoites lacking a functional phosphoenolpyruvate carboxykinase (Delta pepck1) revealed that glutaminolysis is the sole source of gluconeogenic flux in glucose-deprived parasites. In addition, glutaminolysis is essential for sustaining oxidative phosphorylation in zihk parasites, while wild type (wt) and Delta pepck1 parasites can obtain ATP from either glycolysis or oxidative phosphorylation. This study provides insights into the role of nutrient metabolism during asexual propagation and development of T. gondii, and validates the versatile nature of central carbon and energy metabolism in this parasite. (C) 2018 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved.}, issn = { 0020-7519}, doi = {10.1016/j.ijpara.2018.05.013}, author = {Shukla, Anurag and Olszewski, Kellen L. and Llinas, Manuel and Rommereim, Leah M. and Fox, Barbara A. and Bzik, David J. and Xia, Dong and Wastling, Jonathan and Beiting, Daniel and Roos, David S. and Shanmugam, Dhanasekaran} } @article {44634, title = {High surface area nanoporous carbon derived from high quality jute from Bangladesh}, journal = {Materials Chemistry and Physics}, volume = {216}, year = {2018}, month = {SEP}, pages = {491-495}, type = {Article}, abstract = {

We report an economically viable and environment-friendly strategy for the preparation of nanoporous carbon (NC) from jute which is one of the most abundant natural fibers produced in Bangladesh and some South Asian countries. Nitrogen adsorption-desorption isotherms, X-ray diffraction, Raman spectroscopy, UV spectroscopy, and scanning/transmission electron microscopy were performed to characterize the obtained NC. Three different types of jute-derived NCs have been synthesized at three different temperatures, 700 degrees C, 800 degrees C and 900 degrees C. The NC prepared at 800 degrees C resulted in a high surface area (981 m(2) g(-2)) and was associated with the retention of the original fibrous shapes. This study shows a promising future for jute as a natural precursor for NCs for a myriad of applications ranging from water purification to gas separation to energy conversion and storage.

}, keywords = {Adsorbents, Graphitization, Jute, Nanoporous carbons, porous materials}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2018.05.082}, author = {Khan, Junayet Hossain and Lin, Jianjian and Young, Christine and Matsagar, Babasaheb M. and Wu, Kevin C. W. and Dhepe, Paresh L. and Islam, Md Tofazzal and Rahman, Md Mahbubur and Shrestha, Lok Kumar and Alshehri, Saad M. and Ahamad, Tansir and Salunkhe, Rahul R. and Kumar, Nanjundan Ashok and Martin, Darren J. and Yamauchi, Yusuke and Hossain, Md Shahriar A.} } @article {44586, title = {Integrated transcriptomic and proteomic analyses suggest the participation of endogenous protease inhibitors in the regulation of protease gene expression in helicoverpa armigera}, journal = {Molecular \& Cellular Proteomics}, volume = {17}, year = {2018}, month = {JUL}, pages = {1324-1336}, abstract = {Insects adapt to plant protease inhibitors (PIs) present in their diet by differentially regulating multiple digestive proteases. However, mechanisms regulating protease gene expression in insects are largely enigmatic. Ingestion of multi-domain recombinant Capsicum annuum protease inhibitor-7 (CanPI-7) arrests growth and development of Helicoverpa armigera (Lepidoptera: Noctuidae). Using de novo RNA sequencing and proteomic analysis, we examined the response of H. armigera larvae fed on recombinant CanPI-7 at different time intervals. Here, we present evidence supporting a dynamic transition in H. armigera protease expression on CanPI-7 feeding with general down-regulation of protease genes at early time points (0.5 to 6 h) and significant up-regulation of specific trypsin, chymotrypsin and aminopeptidase genes at later time points (12 to 48 h). Further, coexpression of H. armigera endogenous PIs with several digestive protease genes were apparent. In addition to the differential expression of endogenous H. armigera PIs, we also observed a distinct novel isoform of endogenous PI in CanPI-7 fed H. armigera larvae. Based on present and earlier studies, we propose potential mechanism of protease regulation in H. armigera and subsequent adaptation strategy to cope with anti-nutritional components of plants.}, doi = {10.1074/mcp.RA117.000533}, author = {Lomate, Purushottam R. and Dewangan, Veena and Mahajan, Neha S. and Kumar, Yashwant and Kulkarni, Abhijeet and Wang, Li and Saxena, Smita and Gupta, Vidya S. and Giri, Ashok P.} } @article {44164, title = {Intrinsically microporous polyimides containing spirobisindane and phenazine units: synthesis, characterization and gas permeation properties}, journal = {Journal of Polymer Science Part A - Polymer Chemistry}, volume = {56}, year = {2018}, month = {APR }, pages = {766-775}, abstract = {A new diamine containing spirobisindane and phenazine units, namely, 3,3,3,3-tetramethyl-2,2,3,3-tetrahydro-1,1-spirobi[cyclopenta[b]phen azine]-7,7-diamine (TTSBIDA) was synthesized starting from commercially available 5,5,6,6-tetrahydroxy-3,3,3,3-tetramethyl-1,1-spirobisindane (TTSBI). TTSBI was oxidized to 3,3,3,3-tetramethyl-2,2,3,3-tetrahydro-1,1-spirobi[indene]-5,5,6,6-tet raone (TTSBIQ) which was subsequently condensed with 4-nitro-1,2-phenylenediamine to obtain 3,3,3,3-tetramethyl-7,7-dinitro-2,2,3,3-tetrahydro-1,1-spirobi[cyclope nta[b]phenazine] (TTSBIDN). TTSBIDN was converted into TTSBIDA by reduction of the nitro groups using hydrazine hydrate in the presence of Pd/C as the catalyst. A series of new polyimides of intrinsic microporosity (PIM-PIs) were synthesized by polycondensation of TTSBIDA with commercially available aromatic dianhydrides. PIM-PIs exhibited amorphous nature, high thermal stability (T-10\>480 degrees C) and intrinsic microporosity (BET surface area=59-289 m(2)/g). The gas permeation characteristics of films of selected PIM-PIs were evaluated and they exhibited appreciable gas permeability as well as high selectivity. The CO2 and O-2 permeability of PIM-PIs were in the range 185.4-39.2 and 30.6-6.2 Barrer, respectively. Notably, polyimide derived from TTSBIDA and 4,4-(hexafluoroisopropylidene)diphthalic anhydride (PIM-PI-6FDA) exhibited high CO2 and O-2 permeability of 185.4 and 30.6 Barrer with CO2/CH4 and O-2/N-2 selectivity of 43.1 and 5.1, respectively. The data of PIM-PI-6FDA for CO2/CH4 and O-2/N-2 gas pairs were located near Robeson upper bound. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 766-775}, keywords = {Gas permeability, intrinsic microporosity, polyimides, spirobisindane}, issn = {0887-624X}, doi = {10.1002/pola.28950}, author = {Shrimant, Bharat and Dangat, Yuvraj and Kharul, Ulhas K. and Wadgaonkar, Prakash P.} } @article {44194, title = {Marginally hydrogenated triphasic titania nanotubes for effective visible-light photocatalytic hydrogen generation}, journal = {Energy Technology}, volume = {6}, year = {2018}, month = {FEB}, pages = {280-288}, type = {Article}, abstract = {

We report the first demonstration of hydrogen-annealed triphase TiO nanotubes (anatase-rutile-brookite) (T-ARB) as a visible-light-active photocatalyst for water splitting with high quantum efficiency. As-synthesized T-ARB was annealed under hydrogen atmosphere at 250 and 4508 degrees C for 2 h. We found that the tubular structures were retained in the hydrogenated TiO2 samples. It was observed that the concentrations of Ti3+ and the oxygen vacancies and their distribution significantly increased with respect to the hydrogen annealing temperature. Such changes in defects were found to be critical in enhancing the photocatalytic activity of the hydrogen-annealed triphase TiO2 nanotubes. The triphase TiO2 nanotubes hydrogen annealed at 450 degrees C were 16 times more efficient than pristine TiO2. Such an increase in the photocatalytic activity was explained by a triphase band diagram with defect states below the conduction band of each phase, which facilitated visible-light activity and easy transfer of charge carriers from one phase to another. Our study showed that the well-designed multiphase construction with oxygen vacancies enhanced the photocatalytic activity tremendously owing to the presence of a higher number of phase junctions.

}, keywords = {charge transfer, Defects, Hydrogenation, titania, water splitting}, issn = {2194-4288}, doi = {10.1002/ente.201700406}, author = {Preethi, Laguduva K. and Mathews, Tom and Walczak, Lukasz and Gopinath, Chinnakonda S.} } @article {44516, title = {Mechanism of the formation of microphase separated water clusters in a water-mediated physical network of perfluoropolyether tetraol}, journal = {Soft Matter}, volume = {14}, year = {2018}, month = {MAR}, pages = {2339-2345}, abstract = {

Perfluoropolyether tetraol (PFPE tetraol) possesses a hydrophobic perfluoropolyether chain in the backbone and two hydroxyl groups at each chain terminal, which facilitates the formation of hydrogen bonds with water molecules resulting in the formation an extended physical network. About 3 wt\% water was required for the formation of the microphase separated physical network of PFPE tetraol. The mechanism responsible for the microphase separation of water clusters in the physical network was studied using a combination of techniques such as NMR spectroscopy, molecular dynamics (MD) simulations and DSC. MD simulation studies provided evidence for the formation of clusters in the PFPE tetraol physical network and the size of these clusters increased gradually with an increase in the extent of hydration. Both MD simulations and NMR spectroscopy studies revealed that these clusters position themselves away from the hydrophobic backbone or vice versa. The presence of intra-and inter-chain aggregation possibility among hydrophilic groups was evident. DSC results demonstrated the presence of tightly and loosely bound water molecules to the terminal hydroxyl groups of PFPE tetraol through hydrogen bonding. The data from all the three techniques established the formation of a physical network driven by hydrogen bonding between the hydrophilic end groups of PFPE tetraol and water molecules. The flexible nature of the PFPE tetraol backbone and its low solubility parameter favour clustering of water molecules at the terminal groups and result in the formation of a gel.

}, issn = {1744-683X}, doi = {10.1039/c7sm02181j}, author = {Deshpande, Ashwini A. and Torris, Arun A. T. and Pahari, Swagata and Menon, Shamal K. and Badiger, Manohar V. and Rajamohanan, P. R. and Wadgaonkar, Prakash P. and Roy, Sudip and Tonelli, Claudio} } @article {44520, title = {Mechano-responsive room temperature luminescence variations of boron conjugated pyrene in air}, journal = {Chemical Communications}, volume = {54}, year = {2018}, month = {JUN}, pages = {6028-6031}, abstract = {

Stimuli responsive tunable luminescence is a promising field of research. Even though mechanofluorescence is widely studied, mechanophosphorescence remains unexplored. Here we report the mechano-driven fluorescence and phosphorescence variations of a pyrene tetraboronic ester derivative. The fluorochromic and room temperature phosphorescence features are supported by theoretical studies and single crystal analysis. The mechanically ground fluorescence active but phosphorescence inactive pyrene tetraboronic ester exhibits room temperature phosphorescence in air withmechanical force. The efficient intermolecular electronic coupling in the dimer formed upon scratching enables a good communication between singlet and triplet states, hence resulting in room temperature mechanophosphorescence.

}, issn = {1359-7345}, doi = {10.1039/c8cc03494j}, author = {Wakchaure, Vivek C. and Ranjeesh, Kayaramkodath C. and Goudappagouda and Das, Tamal and Vanka, Kumar and Gonnade, Rajesh and Babu, Sukumaran S.} } @article {45474, title = { Nitrosporeusine analogue ameliorates Chandipura virus induced inflammatory response in CNS via NF kappa b inactivation in microglia}, journal = {PLOS Neglected Tropical Diseases}, volume = {12}, year = {2018}, month = {JUL}, type = {Article}, abstract = {Chandipura Virus (CHPV), a negative-stranded RNA virus belonging to the Rhabdoviridae family, has been previously reported to bring neuronal apoptosis by activating several factors leading to neurodegeneration. Following virus infection of the central nervous system, microglia, the ontogenetic and functional equivalents of macrophages in somatic tissues gets activated and starts secreting chemokines, thereby recruiting peripheral leukocytes into the brain parenchyma. In the present study, we have systemically examined the effect of CHPV on microglia and the activation of cellular signalling pathways leading to chemokine expression upon CHPV infection. Protein and mRNA expression profiles of chemokine genes revealed that CHPV infection strongly induces the expression of CXC chemokine ligand 10 (CXCL10) and CC chemokine ligand 5 (CCL5) in microglia. CHPV infection triggered the activation of signalling pathways mediated by mitogen-activated protein kinases, including p38, JNK 1 and 2, and nuclear factor kappa B (NF-kappaB). CHPV-induced expression of CXCL10 and CCL5 was achieved by the activation of p38 and NF-kappaB pathways. Considering the important role of inflammation in neurodegeneration, we have targeted NF-kappaB using a newly synthesised natural product nitrosporeusine analogue and showed incapability of microglial supernatant of inducing apoptosis in neurons after treatment.}, issn = {1935-2735}, doi = {10.1371/journal.pntd.0006648}, author = {Verma, Abhishek Kumar and Waghmare, Trushnal S. and Jachak, Gorakhnath R. and Philkhana, Satish Chandra and Reddy, D. Srinivasa and Basu, Anirban} } @article {44597, title = {N-Methylation of isoDGR peptides: discovery of a selective alpha 5 beta 1-integrin ligand as a potent tumor imaging agent}, journal = {Journal of Medicinal Chemistry}, volume = {61}, year = {2018}, month = {MAR}, pages = {2490-2499}, type = {Article}, abstract = {

Specific targeting of the integrin subtype alpha 5 beta 1 possesses high potential in cancer diagnosis and therapy. Through sequential N-methylation, we successfully converted the biselective alpha 5 beta 1/alpha v beta 6 peptide c(phg-isoDGR-k) into a potent peptidic RGD binding aSfil subtype selective ligand c(phg-isoDGR-(NMe)k). Nuclear magnetic resonance spectroscopy and molecular modeling clarified the molecular basis of its improved selectivity profile. To demonstrate its potential in vivo, c(phg-isoDGR-(NMe)k) was trimerized with the chelator TRAP and used as a positron-emission tomography tracer for monitoring alpha 5 beta 1 integrin expression in a M21 mouse xenograft.

}, issn = {0022-2623}, doi = {10.1021/acs.jmedchem.7b01752}, author = {Kapp, Tobias G. and Di Leva, Francesco Saverio and Notni, Johannes and Raeder, Andreas F. B. and Fottner, Maximilian and Reichart, Florian and Reich, Dominik and Wurzer, Alexander and Steiger, Katja and Novellino, Ettore and Marelli, Udaya Kiran and Wester, Hans-Juergen and Marinelli, Luciana and Kessler, Horst} } @article {44548, title = {Phenazine-containing poly(phenylenevinylene): a new polymer with impressive field emission properties}, journal = {Journal of Polymer Research}, volume = {25}, year = {2018}, month = {FEB}, pages = {Article Number: 61}, abstract = {

Phenazine-containing poly(phenylenevinylene) (P(PHN-PV)) was synthesized using Wittig-Horner polycondensation of the appropriately designed monomers viz. 5,10-dioctyl-5,10-dihydrophenazine-2,7-dicarbaldehyde and tetraethyl ((2,5-bis((2-ethylhexyl) oxy)-1,4 phenylene) bis(methylene)) bis(phosphonate). The design embraces the specific motivation of incorporating the nitrogen-containing heterocycle viz. .phenazine in poly(phenylenevinylene) backbone. P(PHN-PV) exhibited reversible redox properties. In the field emission measurements performed on the film of P(F{\textquoteright}HN-PV), the turn-on field was observed to be 1.93 V/mu m for the current density of 10 mu A/cm(2). The maximum current density of similar to 4.87 mA/cm(2) was achieved at the applied field of 3.84 V/mu m. The emission current showed impressive stability for 6 h at a constant current of 1 mu A (current density of about 20 mu A/cm(2)). These results emphasize the role of phenazine heterocycle with lone pair of electrons on nitrogen in lowering the oxidation onset and in turn reduction of the turn-on voltage.

}, keywords = {field emission, Phenazine, Poly(phenylenevinylene)}, issn = {1022-9760}, doi = {10.1007/s10965-017-1428-8}, author = {Chhatre, Shraddha and Ichake, Amol and Harpale, Kashmira and Patil, Sumati and Deshpande, Aparna and More, Mahendra and Wadgaonkar, Prakash P.} } @article {45402, title = {Spatial-temporal spectroscopy characterizations and electronic structure of methylammonium perovskites}, journal = {MRS Communications}, volume = {8}, year = {2018}, month = {SEP}, pages = {961-969}, type = {Article}, abstract = {

Using time-resolved laser-scanning confocal microscopy and ultrafast optical pump/THz probe spectroscopy, we measure photoluminescence (PL) and THz-conductivity in perovskite micro-crystals and films. PL quenching and lifetime variations occur from local heterogeneity. Ultrafast THz-spectra measure sharp quantum transitions from excitonic Rydberg states, providing weakly bound excitons with a binding energy of similar to 13.5 meV at low temperatures. Ab-initio electronic structure calculations give a direct band gap of 1.64 eV, a dielectric constant of similar to 18, heavy electrons, and light holes, resulting in weakly bound excitons, consistent with the binding energies from the experiment. The complementary spectroscopy and simulations reveal fundamental insights into perovskite light-matter interactions.

}, doi = {10.1557/mrc.2018.114}, author = {Liu, Zhaoyu and Bhamu, K. C. and Luo, Liang and Shah, Satvik and Park, Joong-Mok and Cheng, Di and Long, Men and Biswas, Rana and Fungara, F. and Shiner, Ruth and Shiner, Joseph and Vela, Javier and Wang, Jigang} } @article {45418, title = {Spiro [fluorene-9,9 {\textquoteright}-xanthene]-containing copolymers of intrinsic microporosity: synthesis, characterization and gas permeation properties}, journal = {Reactive \& Functional Polymers}, volume = {133}, year = {2018}, month = {2018}, pages = {153-160}, type = {Article}, abstract = {In the present study, a new bis(catechol) containing spiro[fluorene-9,9{\textquoteright}-xanthene], namely, 4,4{\textquoteright}-(spiro(fluorene9,9{\textquoteright}-xanthene]-2{\textquoteright},7{\textquoteright}-diyl)bis(benzene-1,2-diol) (THSFX) was designed and synthesized. Polycondensation reactions of THSFX and varying compositions of THSFX and 5,5{\textquoteright},6,6{\textquoteright}-tetrahydroxy-3,3,3{\textquoteright},3{\textquoteright}-tetramethyl-1,1{\textquoteright}-spirobisindane (TTSBI) were carried out with 2,3,5,6-tetrafluoroterephthalonitrile (TFTPN) to obtain a homopolymer and copolymers, respectively. The organo-soluble polymers exhibited reasonably high molecular weights (23300-34,100 g/mol) and could be cast into self-standing films from their chloroform solutions. X-Ray diffraction studies indicated that PIMs were amorphous in nature. These polymers exhibited high thermal stability (T-10 = 490-510 degrees C) and possessed intrinsic microporosity with high BET surface area (360-796 m(2)/g). The gas permeation properties of SFX-PIM-25 and SFX-PIM-33 were evaluated and they exhibited high gas permeability (CO2 = 3595-4034 Barrer). The gas permeability data of SFX-PIM-25 and SFX-PIM-33 was located close to 1991 Robson upper bound for CO2/N-2, CO2/CH4 and O-2/N-2 gas pairs}, issn = {1381-5148 }, doi = {10.1016/j.reactfunctpolym.2018.10.008}, author = {Shrimant, Bharat and Kharul, Ulhas K. and Wadgaonkar, Prakash P.} } @article {45366, title = {Synthesis and anticancer activity of conformationally constrained Smac mimetics containing pseudo beta turns}, journal = {Tetrahedron Letters }, volume = {59}, year = {2018}, month = {SEP}, pages = {3473-3476}, type = {Article}, abstract = {Herein, we report synthesis and in vitro anticancer activity of conformationally constrained Smac mimetics containing reverse turn inducing motifs "Ant-Pro" and "sAnt-Pro". The synthesis of Smac analogs with diverse hydrophobic groups at the C-terminus was carried out using solution phase peptide synthesis. The synthesis of Ant-Pro containing analogs 3a-j was carried out by ring opening of benzoxazinones 7a-c, whereas, their sulfonamide counterparts 4a-h were synthesized by using routine acid-amine coupling reaction. In vitro anticancer studies against breast cancer cell line MDA-MB-231 revealed that some of the new analogs had better anticancer activity than the standard AVPI Smac tetrapeptide. (C) 2018 Published by Elsevier Ltd.}, doi = {10.1016/j.tetlet.2018.08.016}, author = {Baravkar, Sachin B. and Wagh, Mahendra A. and Paul, Debasish and Santra, Manas and Sanjayan, Gangadhar J.} } @article {45400, title = { Synthesis and characterization of partially bio-based polyimides based on biphenylene-containing diisocyanate derived from vanillic acid }, journal = {European Polymer JOurnal }, volume = {109}, year = {2018}, month = { DEC}, pages = {257-264}, type = {Article }, abstract = {A new bio-based biphenylene-containing diisocyanate, namely, 5,5{\textquoteright}-diisocyanato-2,2{\textquoteright},3,3{\textquoteright}-tetramethoxy-1,1{\textquoteright}-biphenyl (BDI) was synthesized starting from vanillic acid - a lignin-derived phenolic acid. A series of new partially bio-based polyimides was prepared by polycondensation of BDI with five commercially available aromatic dianhydrides. Polyimides exhibited good solubility in organic solvents and medium molecular weights (Mn (GPC, polystyrene standard) = 25,100-32,200 g mol(-1)). Polyimides showed good thermal stability with 10\% degradation temperature and glass transition temperature in the range 459-473 degrees C and 262-329 degrees C, respectively.}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2018.09.054}, author = {Kuhire, Sachin S. and Ichake, Amol B. and Grau, Etienne and Cramail, Henri and Wadgaonkar, Prakash P.} } @article {44241, title = {Synthesis, characterization, and gas permeation properties of adamantane-containing polymers of intrinsic microporosity}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {56}, year = {2018}, month = {JAN }, pages = {16-24}, type = {Article}, abstract = {

A new bis(catechol) monomer, namely, 4,4-((1r,3r)-adamantane-2,2-diyl)bis(benzene-1,2diol) (THADM) was synthesized by condensation of 2-adamantanone with veratrole followed by demethylation of the formed (1r,3r)-2,2-bis(3,4 dimethoxyphenyl)adamantane. Polycondensation of THADM and various compositions of THADM and 5,5,6,6-tetrahydroxy-3,3,3,3-tetramethylspirobisindane was performed with 2,3,5,6-tetrafluoroterephthalonitrile (TFTPN) to obtain the homopolymer and copolymers. These polymers demonstrated good solubility in common organic solvents such as dichloromethane, chloroform, and tetrahydrofuran and could be cast into tough films from their chloroform solutions. GPC analysis revealed that number average molecular weights of polymers were in the range 48,100-61,700 gmol(-1), suggesting the formation of reasonably high molecular weight polymers. They possessed intrinsic microporosity with Brunauer-Emmett-Teller (BET) surface area in the range 703-741 m(2)g(-1). Thermogravimetric analysis of polymers indicated that 10\% weight loss temperature was in the range 513-518 degrees C demonstrating their excellent thermal stability. THADM-based polymer of intrinsic microporosity (PIM) showed P(CO2)=1080, P(O-2)=232 and appreciable selectivity [(CO2/CH4)=22.6, (CO2/N-2)=26.7, and (O-2/N-2)= 5.7]. The gas permeability measurements revealed that with increase in the content of adamantane units in PIMs, selectivity increased and permeability decreased, following the trade-off relationship. The gas separation properties of PIMs containing adamantane units were located close to 2008 Robeson upper bound for gas pairs such as CO2/CH4, CO2/N-2, H-2/N-2, and O-2/N-2. (c) 2017 Wiley Periodicals, Inc.

}, keywords = {adamantane, Gas permeation, intrinsic microporosity, membranes, structure-property relations}, issn = {0887-624X}, doi = {10.1002/pola.28710}, author = {Shrimant, Bharat and Shaligram, Sayali V. and Kharul, Ulhas K. and Wadgaonkar, Prakash P.} } @article {44455, title = {Tris-hydroxymethylaminomethane (THAM): An efficient organocatalyst in diversity-oriented and environmentally benign synthesis of spirochromenes}, journal = {Comptes Rendus Chimie}, volume = {21}, year = {2018}, month = {JUN }, pages = {814-821}, type = {Article}, abstract = {

Tris-hydroxymethylaminomethane has been demonstrated to be an efficient organocatalyst in diversity-oriented synthesis of medicinally prevalent spirochromenes by one-pot, three-component reactions between isatins, malononitrile, and enolizable CH acids like dimedone, 4-hydroxycoumarin, 4-hydroxy-N-methylquinolin-2-one, or in situ generated 2-methylpyrazolon-2-one. Biodegradability and extremely low cost of the catalyst are the noteworthy features of this chromatography-free protocol.

}, keywords = {green chemistry, Multicomponent synthesis, organocatalysis, Spirochromenes, Tris-hydroxymethylaminomethane}, issn = {16310748}, doi = {10.1016/j.crci.2018.05.005}, author = {Khot, Supriya S. and Anbhule, Prashant V. and Desai, Uday V. and Wadgaonkar, Prakash P.} } @article {46346, title = {2 {\textquoteleft}-5 {\textquoteleft}-Isomerically linked thrombin-binding aptamer (isoTBA) forms a stable unimolecular parallel G-quadruplex in the presence of Sr2+ Ions}, journal = {ChemistrySelect}, volume = {4}, year = {2019}, month = {SEP }, pages = {10668-10673}, type = {Article}, abstract = {

The ability of the isomeri 2 {\textquoteleft}-5 {\textquoteleft}-phosphodiester-linked thrombin-binding DNA aptamer pentadecamer G(2)T(2)G(2)TGTG(2)T(2)G(2) (isoTBA), to fold into G-quadruplex structures in the presence of different mono- and divalent cations is reported. Strikingly, Sr2+ ions cause isoTBA to fold into a stable parallel unimolecular G-quadruplex, in contrast to the antiparallel unimolecular G-quadruplex fold observed in the presence of K+. IsoTBA being advantageously more stable than TBA to nuclease degradation, may thus be useful in the selective detection of Sr2+ ions, which it can sense with a detection limit of similar to 55 mu M.

}, keywords = {2 {\textquoteleft}-5 {\textquoteleft}-phosphodiester, parallel DNA G-quadruplex, strontium binding, thrombin-binding aptamer, unimolecular G-quadruplex}, issn = {2365-6549}, doi = {10.1002/slct.201902005}, author = {Wagh, Atish A. and Fernandes, Moneesha} } @article {46106, title = {Amphiphilic polypyridyl ruthenium complexes: synthesis, characterization and aggregation studies}, journal = {Polyhedron}, volume = {164}, year = {2019}, month = {MAY }, pages = {96-107}, type = {Article}, abstract = {

{Synthesis and characterization of five amphiphilic ruthenium(11) complexes of the type [Ru(Cn)(3)]center dot(PF6)(2) (Cn = 4,4{\textquoteright}-dialkyl-2,2{\textquoteright}-bipyridine

}, keywords = {2, 2 {\textquoteleft}-bipyridine, Aggregation, Amphiphilic ligand, Metallosurfactant, Ruthenium complexes}, issn = {0277-5387}, doi = {10.1016/j.poly.2019.02.035}, author = {Bhand, Sujit and Lande, Dipali N. and Pereira, Eulalia and Gejji, Shridhar P. and Weyhermueller, Thomas and Chakravarty, Debamitra and Puranik, Vedavati G. and Salunke-Gawali, Sunita} } @article {47157, title = {Aromatic polycarbonates bearing pendant maleimide groups via functional monomer approach: synthesis and characterization}, journal = {Journal of Polymer Research}, volume = {27}, year = {2019}, month = {DEC}, pages = {8}, type = {Article}, abstract = {

A new bisphenol containing pendant maleimide group, viz., 4, 4{\textquoteright}-(5-maleimidopentane-2, 2-diyl) diphenol (BPA-MA), was synthesized starting from commercially available 4, 4{\textquoteright}-bis (4-hydroxyphenyl) pentanoic acid. Aromatic (co)polycarbonates possessing pendant maleimide groups were synthesized by solution polycondensation of BPA-MA or varying mixtures of BPA-MA and bisphenol-A (BPA) with triphosgene in dry dichloromethane in the presence of triethylamine as a base. Inherent viscosities and number average molecular weights of (co)polycarbonates were in the range 0.46-0.66 dL/g and 24,600-36,700, respectively, indicating the formation of reasonably high molecular weight polymers. Tough, transparent, and flexible films could be cast from chloroform solutions of these (co)polycarbonates. (Co)polycarbonates were characterized using FT-IR, H-1 NMR, C-13 NMR spectroscopy, XRD, TGA and DSC analysis. The chemical modification of a representative copolycarbonate containing pendant maleimide groups was carried out quantitatively using thiol-maleimide Michael addition reaction with two thiol compounds, namely, 4-chlorothiophenol and 1-adamantanethiol. Additionally, it was demonstrated that copolycarbonate containing pendant maleimide groups could be used to form insoluble cross-linked gel by reaction with a multifunctional thiol cross-linker, namely, pentaerythritol tetrakis(3-mercaptopropionate).

}, keywords = {Aromatic polycarbonate, Cross-linking, maleimide group, Thiol-maleimide reaction, Triphosgene}, issn = {1022-9760}, doi = {10.1007/s10965-019-1909-z}, author = {Nagane, Samadhan S. and Kuhire, Sachin S. and Ichake, Amol B. and Rajamohanan, P. R. and Wadgaonkar, Prakash P.} } @article {45583, title = {Aromatic polyesters containing cardo perhydrocumyl cyclohexylidene groups: synthesis, characterization and gas permeation study}, journal = {Journal of Macromolecular Science, Part A: Pure and Applied Chemistry}, volume = {56}, year = {2019}, month = {FEB}, pages = {136-145}, type = {Article}, abstract = {

Three bisphenols containing cardo perhydrocumyl cyclohexylidene group, namely; 1,1-bis(4-hydroxyphenyl)-4-perhydrocumylcyclohexane, 1,1-bis(4-hydroxy-3-methylphenyl)-4-perhydrocumylcyclohexane and 1,1-bis(4-hydroxy-3,5-dimethylphenyl)-4-perhydrocumylcyclohexane were synthesized starting from p-cumyl phenol. Each of these bisphenols was polycondensed with both terephthaloyl chloride and isophthaloyl chloride by phase transfer-catalyzed interfacial polymerization to obtain a series of new aromatic polyesters. Inherent viscosities and number average molecular weights of polyesters were in the range 0.51-0.64 dL/g and 17390-41430 g/mol, respectively which indicated the formation of reasonably high molecular weight polymers. The detailed NMR studies revealed that axial and equatorial identity of the phenyl rings of bisphenols was retained in polyesters resulting in constitutional isomerism. Polyesters containing perhydrocumyl cyclohexylidene groups showed excellent solubility in organic solvents viz, chloroform, dichloromethane, 1,1,2,2-tetrachloroethane and tetrahydrofuran. The self-standing films of polyesters could be cast from their chloroform solution. The 10\% weight loss temperatures and glass transition temperatures of polyesters were in the range 453{\textendash}485 {\textdegree}C and 201{\textendash}267 {\textdegree}C, respectively demonstrating their excellent thermal characteristics. The gas permeability study of polyesters was carried out for He, H2 and N2 by variable-volume method. An improvement in permeability and decrease in selectivity was observed due to symmetric methyl substituents while reverse trend was observed in case of polyesters with asymmetric methyl substituents.

}, doi = {10.1080/10601325.2018.1549950}, author = {Shingte, R. D. and Chatterjee, D. and Tawade, B. V. and Shrimant, B. and Wadgaonkar, P.P.} } @article {46072, title = {Aromatic polyesters containing pendant azido groups: synthesis, characterization, chemical modification and thermal cross-linking}, journal = {European Polymer Journal}, volume = {116}, year = {2019}, month = {JUL}, pages = {180-189}, type = {Article}, abstract = {

A partially bio-based bisphenol containing pendant azido group viz., 4,4{\textquoteright}-(5-azidopentane-2,2-diyl) diphenol (AZBPA) was synthesized starting from 4,4{\textquoteright}-bis (4-hydroxyphenyl) pentanoic acid. AZBPA was reacted with isophthaloyl chloride (IPC), terephthaloyl chloride (TPC) and a mixture of IPC/TPC (50:50 mol\%) by phase transfer-catalyzed interfacial polycondensation route to obtain aromatic polyesters containing pendant azido groups. Copolyesters containing pendant azido groups were also synthesized by polycondensation of different molar proportions of AZBPA and commercially available 4,4{\textquoteright}-(1-phenylethane-1,1-diyl) diphenol (BPA-AP) with IPC. Inherent viscosities and number average molecular weights of (co)polyesters were in the range 0.85-1.64 dL/g and 58,900-190,400, respectively, indicating the formation of reasonably high molecular weight polymers. Tough, transparent, and flexible films could be cast from chloroform solutions of these polyesters. X-Ray diffraction analysis showed that (co)polyesters were amorphous in nature. (Co)polyesters were characterized using FT-IR, H-1 NMR spectroscopy, XRD, TGA and DSC analysis. The chemical modification of a representative copolyester containing pendant azido groups was carried out quantitatively using copper-catalyzed azide-alkyne cycloaddition (CuAAC) with two alkynes viz., phenyl acetylene (PA) and ethynyl-4-nitrobenzene (ENB). Additionally, (co)polyesters containing pendant azido groups were thermally cross-linked (170 degrees C/12 h) leading to the formation of network structures based on azide to nitrene decomposition and subsequent reactions on polyester backbone. The selected cross-linked polyesters were characterized by stress-strain measurements. The cross-linked polymers exhibited higher tensile strength and Young{\textquoteright}s modulus and lower \% elongation at break compared to corresponding pristine polyesters containing pendant azido groups.

}, keywords = {Aromatic polyester, Chemical modification, Click chemistry, Pendant azido group, Thermal cross-linking}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2019.04.019}, author = {Nagane, Samadhan S. and Verma, Savita and Tawade, V, Bhausaheb and Sane, Prakash S. and Dhanmane, Sushilkumar A. and Wadgaonkar, Prakash P.} } @article {46076, title = {Bentonite - Clay - supported cuprous iodide nanoparticles (BENT- CuI NPs): a new heterogeneous catalyst in diversity - oriented synthesis of 1, 2, 3-triazoles in aqueous medium}, journal = {Chemistryselect}, volume = {4}, year = {2019}, month = {JUN }, pages = {7144-7150}, type = {Article}, abstract = {

Bentonite clay supported cuprous iodide nanoparticles (BENT-CuI NPs) were prepared and demonstrated for the first time as an efficient heterogeneous catalyst in diversity oriented, green synthesis of 1,2,3-triazoles by one-pot, three component reaction between alkyl halides, arylboronic acids, or epoxides with alkynes and sodium azide in aqueous medium. The catalyst was characterized by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES), Energy Dispersive X-ray Spectroscopy(EDS), Scanning Electron Microscopy (SEM), X-Ray Powder Diffraction (XRD), Transmission Electron Microscopy (TEM) as well as Brunauer-Emmett-Teller (BET) techniques and was found to be reusable for five consecutive runs without significant loss of activity.

}, keywords = {1, 2, 3-triazoles, arylboronic acids, click synthesis, epoxides, green chemistry, heterogeneous catalyst}, issn = {2365-6549}, doi = {10.1002/slct.201900421}, author = {Chavan, V, Pramod and Charate, Shrinivas P. and Desai, V, Uday and Rode, V, Chandrashekhar and Wadgaonkar, Prakash P.} } @article {46064, title = {Boron-conjugated pyrenes as fluorescence-based molecular probes and security markers}, journal = {ChemPlusChem}, year = {2019}, month = {JUL}, type = {Article}, abstract = {

Boron-embedded aromatic hydrocarbons are a class of molecules known for their distinct electronic and/or optoelectronic properties and are thus suitable for many potential applications. Among those, boronic ester and acid containing molecules have been widely used for sensing and molecular recognition applications, respectively. We compared the sensing and molecular recognition properties of two boron-containing pyrene derivatives for fluoride and glucose sensing applications. The presence of four boronate ester groups enabled fluoride ion sensing at the mu M level. The boronic acid derivative is very selective towards glucose compared to other saccharides. Furthermore, we used the mechano-responsive fluorescence changes and self-assembly of these derivatives, respectively, for fluorescence-based inkless and ink (water)-based writing in invisible security labeling applications.

}, keywords = {boron, carbohydrates, mechanoluminescence, pyrene, sensors}, issn = {2192-6506}, doi = {10.1002/cplu.201900280, Early Access Date = JULY, Early Access Year = 2019}, author = {Wakchaure, Vivek Chandrakant and Das, Tamal and Babu, Sukumaran Santhosh} } @article {46297, title = {Cascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping (vol 53, pg 7072, 2017)}, journal = {Chemical Communications}, volume = {55}, year = {2019}, month = {JUN }, pages = {6462-6462}, type = {Correction}, abstract = {

Correction for {\textquoteleft}Cascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping{\textquoteright} by Goudappagouda et al., Chem. Commun., 2017, 53, 7072-7075.

}, issn = {1359-7345}, doi = {10.1039/c9cc90228g}, author = {Goudappagouda and Wakchaure, Vivek Chandrakant and Ranjeesh, Kayaramkodath Chandran and Abhai, Chalona Antony Ralph and Babu, Sukumaran Santhosh} } @article {46204, title = {Charge transfer liquid: a stable donor-acceptor interaction in the solvent-free liquid state}, journal = {Chemical Communications}, volume = {55}, year = {2019}, month = {AUG}, pages = {9371-9374}, type = {Article}, abstract = {

Charge-transfer complexes have been an inspiration to develop many functional soft materials. However, most of those studies have focused on solution based assemblies wherein the explicit control of solvents and their polarity are crucial. In this context, we explore an efficient and stable charge transfer liquid using a solvent-free liquid dialkoxynaphthalene donor and a naphthalenediimide acceptor. It has been observed that irrespective of the donor-acceptor ratio, the charge-transfer liquid exhibited an unprecedented stability and retained characteristic features even at increased temperatures. The underlying intermolecular interactions leading to efficient CT have been examined by NMR techniques together with theoretical modelling studies. The concept of charge transfer liquid will be highly beneficial for the development of processable optoelectronically active materials.

}, doi = {10.1039/c9cc03671g}, author = {Wakchaure, Vivek Chandrakant and Pillai, Lekshmi, V and Goudappagouda and Ranjeesh, Kayaramkodath Chandran and Chakrabarty, Suman and Ravindranathan, Sapna and Rajamohanan, Pattuparambil R and Babu, Sukumaran Santhosh} } @article {46154, title = {Click chemistry based multicomponent approach in the synthesis of spirochromenocarbazole tethered 1,2,3-triazoles as potential anticancer agents}, journal = {Bioorganic Chemistry}, volume = {85}, year = {2019}, month = {APR}, pages = {475-486}, type = {Article}, abstract = {

A series of spirochromenocarbazole tethered 1,2,3-triazoles were synthesized via click chemistry based one-pot, five component reaction between N-propargyl isatins, malononitrile, 4-hydroxycarbazole, aralkyl halides and sodium azide using cellulose supported CuI nanoparticles (Cell-CuI NPs) as the heterogeneous catalyst. Antiproliferative activity of all the synthesized compounds was investigated against panel of cancer cell lines such as MCF-7, MDA-MB-231, HeLa, PANG-1, A-549, and THP-1. Many of the synthesized compounds exhibited good anti-proliferative activity against breast (MCF-7 and MDA-MB-231) and cervical (HeLa) cancer cells with IC50 values less than 10 mu M. In case of MCF-7 cells, among the nine compounds that showed good anti-proliferative activity, compounds 6f and 6j were found to be highly potent (IC50 , = 2.13 mu M and 4.80 mu M, respectively). In case of MDA-MB-231, three compounds (6k, 6j and 6s) showed antiproliferative activity amongst which 6k was the most potent one (IC50 = 3.78 mu M). On the other hand, in cervical cancer HeLa cells, compounds 6b, 6g, 6s and 6u showed excellent antiproliferative activity (IC50 = 4.05, 3.54, 3.83, 3.35 mu M, respectively). All the compounds were found to be nontoxic to the human umbilical vein endothelial cells (HUVECs). AO and EtBr staining and fluorescence microscopy studies of the active compounds (IC50 \< 5 mu M) suggested that these compounds induce cell death by apoptosis.

}, keywords = {1, 2, 3-Triazolylspirochromenocarbazole, Anticancer, Apoptotic assay, Click chemistry, Cytotoxicity, heterogeneous catalysis, Multicomponent synthesis}, issn = {0045-2068}, doi = {10.1016/j.bioorg.2019.01.070}, author = {Chavan, V, Pramod and Desai, V, Uday and Wadgaonkar, Prakash P. and Tapase, Savita R. and Kodam, Kisan M. and Choudhari, Amit and Sarkar, Dhiman} } @article {46168, title = {Design and synthesis of 2-amino-thiophene-proline-conjugates and their anti-tubercular activity against mycobacterium tuberculosis H37Ra}, journal = {ChemistrySelect}, volume = {4}, year = {2019}, month = {MAR }, pages = {2851-2857}, type = {Article}, abstract = {

The emergence of extensively drug resistant tuberculosis (XDRTB) and multi-drug resistant tuberculosis (MDR-TB) has necessitated the development of new drugs with short chemotherapy treatment regime and cost effectiveness. To overcome these challenges, we are reporting the synthesis of a series of 2-amino-thiophene-proline-conjugates which show potent invino and ex-vivo anti-tubercular (anti-TB) activity against mycobacterium tuberculosis (rntb) H37Ra. The synthesis of these 2-amino-thiophene-proline-conjugates was carried out via solution phase peptide coupling reactions using methyl-2aminothiophene-3-carboxylate 8 as an intermediate obtained by modified gewald reaction. Intermediate 8 was coupled with different amino acids to obtain dipeptides 3, 4, 5, 6a and 7. Priliminary anti-TB assay data encoureaged us to synthesize modified proline derivatives 6b-6k via formation of a benzoxazinone intermediate 16. Most of these conjugates are active against mtb H37Ra in both active (A) and dormant (D) strains. They are also active against drug resistant mtb H37Ra strains. A trifluoroethyl ester analog, 6i was the most potent among the series [MIC 1 mu g/mL] along with 6f and 6g [MIC 2-6 mu g/mL]. Cytotoxicity studies suggested that, these compounds are less cytotoxic to human cell lines HeLa, MCF-7, HUVEC and hence possess high selectivity index (SI). Docking studies revealed that the binding mode of most active compounds 6i, 6g and 6f is in accordance with their bioactivity studies having docking score 8.969, 8.446 and 7.865, respectively. More- over, in sllico ADME properties suggest that all the compounds possess drug like properties.

}, keywords = {2-aminothiophene, Anti-tubercular, docking studies, Inh A gene, selectivity index}, issn = {2365-6549}, doi = {10.1002/slct.201803370}, author = {Baravkar, Sachin B. and Wagh, Mahendra A. and Nawale, Laxman U. and Choudhari, Amit S. and Bhansali, Sujit and Sarkar, Dhiman and Sanjayan, Gangadhar J.} } @article {45483, title = {Design and synthesis of aromatic polyesters bearing pendant clickable maleimide groups}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {57}, year = {2019}, month = {MAR }, pages = {630-640}, type = {Article}, abstract = {

A bisphenol bearing pendant maleimide group, namely, N-maleimidoethyl-3, 3-bis(4-hydroxyphenyl)-1-isobenzopyrrolidone (PPH-MA) was synthesized starting from phenolphthalein. Aromatic (co)polyesters bearing pendant maleimide groups were synthesized from PPH-MA and aromatic diacid chlorides, namely, isophthaloyl chloride (IPC), terephthaloyl chloride (TPC), and 50:50 mol \% mixture of IPC and TPC by low temperature solution polycondensation technique. Copolyesters were also synthesized by polycondensation of different molar proportions of PPH-MA and bisphenol A with IPC. Inherent viscosities and number-average molecular weights of aromatic (co)polyesters were in the range of 0.52-0.97 dL/g and 20,200-32,800 g/mol, respectively indicating formation of medium to reasonably high-molecular-weight polymers. C-13 NMR spectral analysis of copolyesters revealed the formation of random copolymers. The 10\% weight loss temperature of (co)polyesters was found in the range 470-484 degrees C, indicating their good thermal stability. A selected aromatic polyester bearing pendant maleimide groups was chemically modified via thiol-maleimide Michael addition reaction with two representative thiol compounds, namely, 4-chlorothiophenol and 1-adamantanethiol to yield post-modified polymers in a quantitative manner. Additionally, it was demonstrated that polyester containing pendant maleimide groups could be used to form insoluble crosslinked gel in the presence of a multifunctional thiol crosslinker. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 630-640

}, keywords = {crosslinking, maleimide group, modification, polyesters, thiol-maleimide}, issn = {0887-624X}, doi = {10.1002/pola.29303}, author = {Nagane, Samadhan S. and Kuhire, Sachin S. and Jadhav, Uday A. and Dhanmane, Sushilkumar A. and Wadgaonkar, Prakash P.} } @article {45576, title = {Enhanced energy density and stability of self-assembled cauliflower of Pd doped monoclinic WO3 nanostructure supercapacitor}, journal = {Materials Chemistry and Physics}, volume = {225}, year = {2019}, month = {MAR}, pages = {192-199}, type = {Article}, abstract = {Enhanced electrochemical performance of WO3 nanostructures by engineering their morphology, structural and surface defect at nanoscale is feasible. Herein we report the effect of Pd doping on the morphological and electrochemical properties of WO3 at nanoscale prepared by a simple hydrothermal method. The synthesized pristine WO3 (cabbage like morphology) and Pd doped WO3 (cauliflower like morphology) are examined by using XRD, XPS, Raman spectra, BET, FE-SEM, TEM. The morphological investigation shows the effective rebuilding of nanosheets assembled cabbage shaped pristine WO3 into nanobricks assembled cauliflower shaped Pd doped WO3 with improvement in crystallinity, surface area and conductivity. As a result, the enhancement in the electrochemical performance of cauliflower shaped Pd-WO3 is recorded four times higher specific capacitance than pristine WO3. Additionally, the excellent cyclic stability (almost ten times higher than pristine WO3) up to 1100 cycles with nearly 86.95\% capacity retention is observed in Pd-WO3 attributed to Pd content and highly modified structural arrangement.}, doi = {10.1016/j.matchemphys.2018.12.077}, author = {Gupta, S. P. and Patil, V. B. and Tarwal, N. L. and Bhame, S. D. and Gosavi, S. W. and Mulla, I. S. and Late, D. J. and Suryavanshi, S. S. and Walke, P. S.} } @article {47175, title = {Experimental investigation on performance of helical spring lock washer under different operating conditions}, journal = {Journal of Failure Analysis and Prevention}, volume = {19}, year = {2019}, month = {JUL}, pages = {992{\textendash}1000}, type = {Article}, abstract = {

In mechanical systems, emphasis has been given to the selection and health monitoring of both bolt and nut in the bolted joint assembly; less attention has been given to the performance of spring washers due to tightening torque, usage duration and reuse. In the present experimental investigation, the load{\textendash}deflection characteristics of helical spring lock (HSL) washer during compressive loading and unloading are determined using newly designed and developed test rig. Also, the load{\textendash}deflection characteristics of the HSL washers are examined for reuse cycles. Additionally, the effect of compressive loading and unloading on the reaction load within elastic limit is determined. Further, the loss of helix height due to compressive loading and its effect on strain energy is examined. The tests have evidenced of loss of helix height and strain energy of HSL washer due to compressive loading which deteriorates its functionality in further usage.

}, doi = {10.1007/s11668-019-00685-z}, author = {Wagh, Hemant Krishnarao and Desale, Girish R.} } @article {46177, title = {High-performing PGM-free AEMFC cathodes from carbon-supported cobalt ferrite nanoparticles}, journal = {Catalysts}, volume = {9}, year = {2019}, month = {MAR}, pages = {264}, type = {Article}, abstract = {

Efficient and durable non-precious metal electrocatalysts for the oxygen reduction reaction (ORR) are highly desirable for several electrochemical devices, including anion exchange membrane fuel cells (AEMFCs). Here, cobalt ferrite (CF) nanoparticles supported on Vulcan XC-72 carbon (CF-VC) were created through a facile, scalable solvothermal method. The nano-sized CF particles were spherical with a narrow particle size distribution. The CF-VC catalyst showed good ORR activity, possessing a half-wave potential of 0.71 V. Although the intrinsic activity of the CF-VC catalyst was not as high as some other platinum group metal (PGM)-free catalysts in the literature, where this catalyst really shined was in operating AEMFCs. When used as the cathode in a single cell 5 cm(-2) AEMFC, the CF-VC containing electrode was able to achieve a peak power density of 1350 mW cm(-2) (iR-corrected: 1660 mW cm(-2)) and a mass transport limited current density of more than 4 A cm(-2) operating on H-2/O-2. Operating on H-2/Air (CO2-free), the same cathode was able to achieve a peak power density of 670 mW cm(-2) (iR-corrected: 730 mW cm(-2)) and a mass transport limited current density of more than 2 A cm(-2). These peak power and achievable current densities are among the highest reported values in the literature to date.

}, keywords = {AEMFC, cobalt, Ferrite, high-performing, non-PGM, vulcan}, issn = {2073-4344}, doi = {10.3390/catal9030264}, author = {Peng, Xiong and Kashyap, Varchaswal and Ng, Benjamin and Kurungot, Sreekumar and Wang, Lianqin and Varcoe, John R. and Mustain, William E.} } @article {46348, title = {Imidazole-linked crystalline two-dimensional polymer with ultrahigh proton-conductivity}, journal = {Journal of the American Chemical Society}, volume = {141}, year = {2019}, month = {SEP}, pages = {14950-14954}, type = {Article}, abstract = {

Proton-exchange membrane fuel cells are promising energy devices for a sustainable future due to green features, high power density, and mild operating conditions. A facile proton-conducting membrane plays a pivotal role to boost the efficiency of fuel cells, and hence focused research in this area is highly desirable. Major issues associated with the successful example of Nafion resulted in the search for alternate proton conducting materials. Even though proton carrier loaded crystalline porous organic frameworks have been used for protonconduction, the weak host-guest interactions limited their practical use. Herein, we developed a crystalline 2D-polymer composed of benzimidazole units as the integral part, prepared by the condensation of aryl acid and diamine in polyphosphoric acid medium. The imidazole linked-2D-polymer exhibits ultrahigh proton conductivity (3.2 X 10(-2) S cm(-1)) (at 95\% relative humidity and 95 degrees C) in the pristine state, which is highest among the undoped porous organic frameworks so far reported. The present strategy of a crystalline proton-conducting 2D-polymer will lead to the development of new high performing crystalline solid proton conductor.

}, issn = {0002-7863}, doi = {10.1021/jacs.9b06080}, author = {Ranjeesh, Kayaramkodath Chandran and Ilathvalappil, Rajith and Veer, Sairam Dnyaneshwar and Peter, Joseph and Wakchaure, Vivek Chandrakant and Goudappagouda and Raj, K. Vipin and Kurungot, Sreekumar and Babu, Sukumaran Santhosh} } @article {45509, title = {New approach for the synthesis of miktoarm star polymers through a combination of thiol-epoxy {\textquoteleft}{\textquoteleft}click{\textquoteright}{\textquoteright} chemistry and ATRP/Ring-opening polymerization techniques}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {57}, year = {2019}, month = {JAN }, pages = {146-156}, type = {Article}, abstract = {

A new approach was developed for synthesis of certain A(3)B(3)-type of double hydrophilic or amphiphilic miktoarm star polymers using a combination of {\textquoteleft}{\textquoteleft}grafting onto{\textquoteright}{\textquoteright} and {\textquoteleft}{\textquoteleft}grafting from{\textquoteright}{\textquoteright} methods. To achieve the synthesis of desired miktoarm star polymers, acetyl protected poly(ethylene glycol) (PEG) thiols (M-n = 550 and 2000 g mol(-1)) were utilized to generate A(3)-type of homoarm star polymers through an in situ protective group removal and a subsequent thiol-epoxy {\textquoteleft}{\textquoteleft}click{\textquoteright}{\textquoteright} reaction with a tris-epoxide core viz. 1,1,1-tris(4-hydroxyphenyl)ethane triglycidyl ether. The secondary hydroxyl groups generated adjacent to the core upon the thiol-epoxy reaction were esterified with alpha-bromoisobutyryl bromide to install atom transfer radical polymerization (ATRP) initiating sites. ATRP of N-isopropylacrylamide (NIPAM) using the three-arm star PEG polymer fitted with ATRP initiating sites adjacent to the core afforded A(3)B(3)-type of double hydrophilic (PEG)(3)[poly(N-isopropylacrylamide)] (PNIPAM)(3) miktoarm star polymers. Furthermore, the generated hydroxyl groups were directly used as initiator for ring-opening polymerization of epsilon-caprolactone to prepare A(3)B(3)-type of amphiphilic (PEG)(3)[poly(epsilon-caprolactone)](3) miktoarm star polymers. The double hydrophilic (PEG)(3)(PNIPAM)(3) miktoarm star polymers showed lower critical solution temperature around 34 degrees C. The preliminary transmission electron microscopy analysis indicated formation of self-assembly of (PEG)(3)(PNIPAM)(3) miktoarm star polymer in aqueous solution. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 146-156

}, keywords = {Atom transfer radical polymerization (ATRP), miktoarm star polymers, ring-opening polymerization (ROP), thermoresponsive, thiol-epoxy}, issn = {0887-624X}, doi = {10.1002/pola.29278}, author = {Gadwal, Ikhlas and Wadgaonkar, Prakash P. and Ichake, Amol B. and Mane, Shivshankar R.} } @article {46059, title = {New cardo bisphenol monomer containing pendant azido group and the resulting aromatic polyesters}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {57}, year = {2019}, month = {JUL }, pages = {1516-1526}, type = {Article}, abstract = {

Expanding on our strategy to synthesize aromatic step-growth polymers containing pendant clickable azido groups via functional monomer approach, we have now designed and synthesized a new cardo bisphenol, viz., 2-(2-azidoethyl)-3, 3-bis(4-hydroxyphenyl) isoindolin-1-one (PPH-N-3). PPH-N-3 was conveniently synthesized starting from commercially available phenolphthalein by a three-step route in an overall yield of 65\% using simple organic transformations. Aromatic (co)polyesters bearing pendant azido groups were synthesized by low-temperature solution polycondensation of PPH-N-3 or different molar ratios of PPH-N-3 and bisphenol-A (BPA) with aromatic diacid chlorides in dry dichloromethane in the presence of triethylamine (TEA) as a base. The formation of medium to reasonably high-molecular-weight (co)polyesters was evidenced from intrinsic viscosity and number-average molecular-weight measurements that were in the range 0.52-0.85 dL/g and 16,700-28,200, respectively. Tough, transparent, and flexible films could be cast from chloroform solutions of these (co)polyesters. (Co)polyesters were characterized using FTIR, H-1 NMR, C-13 NMR spectroscopy, XRD, and TGA. The thermal curing reaction of (co)polyesters involving decomposition of azido groups was studied by DSC analysis. The chemical modification of a representative copolyester containing pendant azido groups was carried out quantitatively using catalyst-free azide-maleimide cycloaddition reaction with two maleimides, namely, N-methylmaleimide and N-hexylmaleimide. (c) 2019 Wiley Periodicals, Inc.

}, keywords = {aromatic (co)polyester, azido group, cardo bisphenol, Chemical modification}, issn = {0887-624X}, doi = {10.1002/pola.29414}, author = {Maher, Deepak M. and Nagane, Samadhan S. and Jadhav, Uday A. and Salunkhe, Pravin H. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.} } @article {45620, title = {Paintable room-temperature phosphorescent liquid formulations of alkylated bromonaphthalimide}, journal = {Angewandte Chemie - International Edition}, volume = {58}, year = {2019}, month = {FEB}, pages = {2284-2288}, type = {Article}, abstract = {Organic phosphors have been widely explored with an understanding that crystalline molecular ordering is a requisite for enhanced intersystem crossing. In this context, we explored the room-temperature phosphorescence features of a solvent-free organic liquid phosphor in air. While alkyl chain substitution varied the physical states of the bromonaphthalimides, the phosphorescence remained unaltered for the solvent-free liquid in air. As the first report, a solvent-free liquid of a long swallow-tailed bromonaphthalimide exhibits room-temperature phosphorescence in air. Doping of the phosphor with carbonyl guests resulted in enhanced phosphorescence, and hence a large-area paintable phosphorescent liquid composite with improved lifetime and quantum yield was developed.}, doi = {10.1002/anie.201811834}, author = {Goudappagouda and Manthanath, A. and Wakchaure, V. C. and Ranjeesh, K. C. and Das, T. and Vanka, K. and Nakanishi, T. and Babu, S. S.} } @article {46171, title = {Partially bio-based aromatic poly(ether sulfone)s bearing pendant furyl groups: synthesis, characterization and thermo-reversible cross-linking with a bismaleimide}, journal = {Polymer Chemistry}, volume = {10}, year = {2019}, month = {MAR }, pages = {1089-1098}, type = {Article}, abstract = {

A fully bio-based bisphenol bearing pendant furyl group, viz., 4,4{\textquoteright}-(furan-2-ylmethylene) bis(2-methoxyphenol) (BPF) was synthesized by base-catalyzed condensation of furfural with guaiacol. New partially bio-based (co) poly(ether sulfone) s bearing pendant furyl groups were synthesized via aromatic nucleophilic substitution polycondensation of BPF and various mixtures of BPF and bisphenol-A with bis(4-fluorophenyl) sulfone in N, N-dimethylacetamide as a solvent. (Co) poly(ether sulfone) s showed inherent viscosities in the range 0.92-1.47 dL g(-1) and number average molecular weights ((M-n) over bar), obtained from GPC, were in the range 91 300-131 000 g mol(-1). (Co) poly(ether sulfone) s could be cast into tough, transparent and flexible films from chloroform solutions. (Co)poly(ether sulfone)s showed 10\% weight loss in the temperature range 431-481 degrees C and DSC showed T-g in the range 179-190 degrees C. Tensile strength, Young{\textquoteright}s modulus and elongation at break, obtained from tensile testing of (co) poly(ether sulfone) s containing pendant furyl groups, were in the range 76.7-83.8 MPa, 1.02-1.18 GPa and 21.4-89.7\%, respectively. Most interestingly, pendant furyl groups in (co) poly(ether sulfone) s provide reactive sites for click modification and cross-linking via Diels-Alder reaction with maleimides and bismaleimides, respectively. Crosslinked (co) poly(ether sulfone) was prepared via Diels-Alder reaction of a representative (co) poly(ether sulfone) containing pendant furyl groups with 1,1{\textquoteright}-(methylenedi-1,4-phenylene) bismaleimide (BMI) at 60 degrees C. The formation of cross-linked poly(ether sulfone) was demonstrated by gelation tests, solubility tests and DSC. The cross-linked copoly(ether sulfone) prepared using BMI showed enhanced tensile strength and Young{\textquoteright}s modulus compared to parent copoly(ether sulfone) and was recycled two times with retention of mechanical properties.

}, issn = {1759-9954}, doi = {10.1039/c8py01477a}, author = {Nagane, Samadhan S. and Kuhire, Sachin S. and Mane, Shivshankar R. and Wadgaonkar, Prakash P.} } @article {46438, title = {Pathways to defense metabolites and evading fruit bitterness in genus Solanum evolved through 2-oxoglutarate-dependent dioxygenases}, journal = {Nature Communications}, volume = {10}, year = {2019}, month = {NOV}, pages = {5169}, type = {Article}, abstract = {

The genus Solanum comprises three food crops (potato, tomato, and eggplant), which are consumed on daily basis worldwide and also producers of notorious anti-nutritional steroidal glycoalkaloids (SGAs). Hydroxylated SGAs (i.e. leptinines) serve as precursors for leptines that act as defenses against Colorado Potato Beetle (Leptinotarsa decemlineata Say), an important pest of potato worldwide. However, SGA hydroxylating enzymes remain unknown. Here, we discover that 2-OXOGLUTARATE-DEPENDENT-DIOXYGENASE (2-ODD) enzymes catalyze SGA-hydroxylation across various Solanum species. In contrast to cultivated potato, Solanum chacoense, a widespread wild potato species, has evolved a 2-ODD enzyme leading to the formation of leptinines. Furthermore, we find a related 2-ODD in tomato that catalyzes the hydroxylation of the bitter a-tomatine to hydroxytomatine, the first committed step in the chemical shift towards downstream ripening-associated non-bitter SGAs (e.g. esculeoside A). This 2-ODD enzyme prevents bitterness in ripe tomato fruit consumed today which otherwise would remain unpleasant in taste and more toxic.

}, issn = {2041-1723}, doi = {10.1038/s41467-019-13211-4}, author = {Cardenas, Pablo D. and Sonawane, Prashant D. and Heinig, Uwe and Jozwiak, Adam and Panda, Sayantan and Abebie, Bekele and Kazachkova, Yana and Pliner, Margarita and Unger, Tamar and Wolf, Dalia and Ofner, Itai and Vilaprinyo, Ester and Meir, Sagit and Davydov, Olga and Gal-On, Amit and Burdman, Saul and Giri, Ashok and Zamir, Dani and Scherf, Tali and Szymanski, Jedrzej and Rogachev, Ilana and Aharoni, Asaph} } @article {46209, title = {Probing the effect of selenium substitution in kesterite-Cu2ZnSnS4 nanocrystals prepared by hot injection method}, journal = {Journal of Materials Science-Materials in Electronics }, volume = {30}, year = {2019}, month = {AUG}, pages = {14781-14790}, type = {Article}, abstract = {

In this paper, we report the effect of sulfur (S) substitution with selenium (Se) in CZTS nanocrystals prepared by hot injection method. The formation of kesterite-copper zinc tin sulfide (Cu2ZnSnS4, CZTS) and copper zinc tin selenide (Cu2ZnSnSe4, CZTSe) nanocrystals is confirmed by X-ray diffraction (XRD), Raman spectroscopy and transmission electron microscopy (TEM) analysis. The XRD, TEM and atomic force microscopy (AFM) analysis shows an overall increase in average crystallite size upon Se substitution. AFM images revealed an increase in root mean square surface roughness (S-q) and average surface roughness (S-a) when S in CZTS is replaced by Se. The substitution of S by Se in host CZTS narrows the optical band gap from 1.56 to 1.03 eV. The ultraviolet photoelectron spectroscopy (UPS) analysis shows shift in valence band and conduction band edge in CZTSe compared to CZTS. The photocurrent density measurement in synthesized CZTSe thin films is similar to 4 to 5 times higher than CZTS thin films. The obtained results show that CZTSe can be a promising candidate as absorber material in photovoltaic applications.

}, doi = {10.1007/s10854-019-01851-7}, author = {Pandharkar, Subhash and Rondiya, Sachin and Bhorde, Ajinkya and Nair, Shruthi and Aher, Rahul and Vairale, Priti and Waghmare, Ashish and Naik, Dhirsing and Waykar, Ravindra and Jadhav, Yogesh} } @article {46184, title = {Selective targeting of integrin alpha v beta 8 by a highly active cyclic peptide}, journal = {Journal of Medicinal Chemistry}, volume = {62}, year = {2019}, month = {FEB }, pages = {2024-2037}, type = {Article}, abstract = {

Integrins play important roles in physiological and pathophysiological processes. Among the RGD-recognizing integrin subtypes, the alpha v beta 8 receptor is emerging as an attractive target because of its involvement in various illnesses, such as autoimmune diseases, viral infections, and cancer. However, its functions have, so far, not been investigated in living subjects mainly because of the lack of a selective alpha v beta 8 ligand. Here, we report the design and potential medical applications of a cyclic octapeptide as the first highly selective small-molecule ligand for alpha v beta 8. Remarkably, this compound displays low nanomolar alpha v beta 8 binding affinity and a strong discriminating power of at least 2 orders of magnitude versus other RGD-recognizing integrins. Peptide functionalization with fluorescent or radioactive labels enables the selective imaging of alpha v beta 8-positive cells and tissues. This new probe will pave the way for detailed characterization of the distinct (patho)physiological role of this relatively unexplored integrin, providing a basis to fully exploit the potential of alpha v beta 8 as a target for molecular diagnostics and personalized therapy regimens.

}, issn = {0022-2623}, doi = {10.1021/acs.jmedchem.8b01588}, author = {Reichart, Florian and Maltsev, Oleg V. and Kapp, Tobias G. and Raeder, Andreas F. B. and Weinmueller, Michael and Marelli, Udaya Kiran and Notni, Johannes and Wurzer, Alexander and Beck, Roswitha and Wester, Hans Juergen and Steiger, Katja and Di Maro, Salvatore and Di Leva, Francesco Saverio and Marinelli, Luciana and Nieberler, Markus and Reuning, Ute and Schwaiger, Markus and Kessler, Horst} } @article {46077, title = {Self-assemblies of nucleolipid supramolecular synthons show unique self-sorting and cooperative assembling process}, journal = {Nanoscale}, volume = {11}, year = {2019}, month = {JUN }, pages = {11956-11966}, type = {Article}, abstract = {

The inherent control of the self-sorting and co-assembling process that has evolved in multi-component biological systems is not easy to emulate in vitro using synthetic supramolecular synthons. Here, using the basic component of nucleic acids and lipids, we describe a simple platform to build hierarchical assemblies of two component systems, which show an interesting self-sorting and co-assembling behavior. The assembling systems are made of a combination of amphiphilic purine and pyrimidine ribonucleoside-fatty acid conjugates (nucleolipids), which were prepared by coupling fatty acid acyl chains of different lengths at the 2 {\textquoteleft}-O- and 3 {\textquoteleft}-O-positions of the ribose sugar. Individually, the purine and pyrimidine nucleolipids adopt a distinct morphology, which either supports or does not support the gelation process. Interestingly, due to the subtle difference in the order of formation and stability of individual assemblies, different mixtures of supramolecular synthons and complementary ribonucleosides exhibit a cooperative and disruptive self-sorting and co-assembling behavior. A systematic morphological analysis combined with single crystal X-ray crystallography, powder X-ray diffraction (PXRD), NMR, CD, rheological and 3D X-ray microtomography studies provided insights into the mechanism of the self-sorting and co-assembling process. Taken together, this approach has enabled the construction of assemblies with unique higher ordered architectures and gels with remarkably enhanced mechanical strength that cannot be derived from the respective single component systems.

}, issn = {2040-3364}, doi = {10.1039/c9nr01863h}, author = {Nuthanakanti, Ashok and Walunj, Manisha B. and Torris, Arun and Badiger, Manohar V. and Srivatsan, Seergazhi G.} } @article {45614, title = {Squaraine-linked metalloporphyrin two-dimensional polymer photocatalyst for hydrogen and oxygen evolution reactions}, journal = {Chemical Communications}, volume = {55}, year = {2019}, month = {JAN}, pages = {1627-1630}, type = {Article}, abstract = {Efficient water splitting photocatalysts are an energetically demanding and cost-effective method for generating renewable energy. Significant research has been reported to advance this approach. However, the use of organic photocatalysts and the presence of residual catalysts trapped in the porous frameworks present major concerns about the efficiency of this strategy. Herein, we report the photocatalytic evolution of H2 and O2 by a multi-hydroxyl group-decorated metalloporphyrin-based two-dimensional catalyst developed via metal catalyst-free synthetic route. Though metalloporphyrins have long been used for catalytic functions, a heterogeneous photocatalyst delivering both H2 and O2 has not yet been realized. This polymer catalyst design enables the photocatalytic diatomic O2 release, a bottleneck in water splitting, in a facile way. Photocatalytic release of H2 as well as O2 occurs with long-term durability of 20 cycles in 300 days with negligible decrease in efficiency, thus demonstrating the excellent performance of this new catalyst.}, doi = {10.1039/C8CC09132C}, author = {Ranjeesh, K. C. and George, L. and Wakchaure, V. C. and Goudappagouda and Devi, R. N. and Babu, S. S.} } @article {46044, title = {Superior humidity sensor and photodetector of mesoporous ZnO nanosheets at room temperature}, journal = {Sensors and Actuators B-Chemical}, volume = {293}, year = {2019}, month = {AUG}, pages = {83-92}, type = {Article}, abstract = {

Miniaturized sensor technology is vastly demanding multifunctional materials to fulfill many requirements simultaneously; instead of integrating various sensors into a single device. Efficient operation of these miniaturized sensors at room temperature is highly feasible and cost-effective. The humidity sensing and photodetection is precise merit of sensing in special usage like artificial skin. Sensitivity enhancement in both humidity and photodetection required the high surface area for adsorption as well as a high charge transfer mechanism. The two dimensional (2D) zinc oxide nanosheets (ZnO NS) is the ultimate structure for dimensionally confined transport properties owing to the specific surface atomic configuration that results in high sensitivity, low operating temperature, fast response and recovery, and improved selectivity. Furthermore, introducing porosity into 2D nanostructures has opened new opportunities to enhance the efficiency of sensors and detectors via increasing large surface area and tunable physical and chemical properties. Here we report preparation of mesoporous and highly crystalline 2D ZnO NS by a single step, template free, cost-effective chemical method. The structural and morphological characterizations of ZnO NS are carried out using XRD, FESEM, XPS, TEM respectively. The high-resolution TEM images emphasize sheet-like morphology with a thickness of around 18-22 nm. Further the mesoporous ZnO NS (MZNS) with the pore size between 5-10 nm are achieved by simple heat-treatment. XPS and PL study is confirming the oxygen deficiency in MZNS. The MZNS exhibits an excellent responsivity than PZNS with a fast response and rapid recovery time of 25 s and 5 s respectively along with good cyclic stability which is highly crucial for smart humidity sensor. Furthermore, it considerably enhances photo-sensor performance than pristine ZnO NS (PZNS) with (similar to)1 s response time as well as (similar to)1 s recovery time along with better stability. These promising results illustrate the great potential of MZNS for next-generation humidity sensors and photodetectors.

}, keywords = {humidity sensor, Mesoporous, nanosheets, Photo-detector}, issn = {0925-4005}, doi = {10.1016/j.snb.2019.04.086}, author = {Gupta, Shobhnath P. and Pawbake, Amit S. and Sathe, Bhaskar R. and Late, Dattatray J. and Walke, Pravin S.} } @article {45482, title = {Thermally crosslinkable and chemically modifiable aromatic polyesters possessing pendant propargyloxy groups}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {57}, year = {2019}, month = {MAR}, pages = {588-597}, type = {Article}, abstract = {

New aromatic (co)polyesters containing pendant propargyloxy groups were synthesized by phase transfer-catalyzed interfacial polycondensation of 5-(propargyloxy)isophthaloyl chloride (P-IPC) and various compositions of P-IPC and isophthaloyl chloride with bisphenol A. FTIR and NMR spectroscopic data, respectively, revealed successful incorporation of pendant propargyloxy groups into (co)polyesters and formation of (co)polyesters with desired compositions. (Co)polyesters exhibited good solubility in common organic solvents such as chloroform, dichloromethane, and tetrahydrofuran and could be cast into transparent, flexible, and tough films from chloroform solution. Inherent viscosities and number average molecular weights of (co)polyesters were in the range 0.77-1.33 dL/g and 43,600-118,000 g/mol, respectively, indicating the achievement of reasonably high-molecular weights. The 10\% weight loss temperatures of (co)polyesters were in the range 390-420 degrees C, demonstrating their good thermal stability. (Co)polyesters exhibited T-g in the range 146-170 degrees C and T-g values decreased with increase in mol \% incorporation of P-IPC. The study of non-isothermal curing by DSC indicated thermal crosslinking of (co)polyesters via propargyloxy groups. The utility of pendant propargyloxy group was demonstrated by post-modification of the selected copolyester with 1-(4-azidobutyl)pyrene, 9-(azidomethyl)anthracene, and azido-terminated poly(ethyleneglycol) monomethyl ether via copper(I)-catalyzed Huisgen 1,3-dipolar cycloaddition reaction. FTIR and H-1 NMR spectra confirmed that click reaction was quantitative. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 588-597

}, keywords = {Click chemistry, crosslinking, modification, polyesters, propargyloxy, step-growth polymerization}, issn = {0887-624X}, doi = {10.1002/pola.29297}, author = {Verma, Savita and Maher, Deepak M. and Nagane, Samadhan S. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.} } @inbook {47482, title = {Ultrasound assisted extraction of the polysaccharide from Tuber aestivum and its in vitro anti-hyperglycemic activity}, booktitle = {Bioactive Carbohydrates and Dietary Fibre}, volume = {20}, year = {2019}, publisher = {Elsevier}, organization = {Elsevier}, abstract = {Tuber aestivum is one of the most popular and delicious truffles in the world economic market and is reported to possess a wide range of biological activities. The total carbohydrate of this truffle constitutes about 5.65\% w/w dry weight basis (dwb). The present work compares the yield of the polysaccharide obtained by conventional hot water extraction followed by alcohol precipitation, and ultrasound assisted extraction using low power 150 W probe sonifier. The parameters of ultrasound assisted extraction (amplitude, extraction time, pH, and liquid-solid ratio) from the fruiting body of T. aestivum were optimized using Taguchi orthogonal array and central composite design. The optimal parameters of extraction were a liquid-solid ratio of 75:1 for 15 min at pH 6.5 at an amplitude of 25\%, which yielded 68.91 {\textpm} 1.54\% w/w dwb polysaccharide. The FTIR and SEM characteristics of the polysaccharides obtained by ultrasonic extraction and conventional hot water extraction were similar. Further, the polysaccharides extracted from T. aestivum demonstrated a significant in vitro anti-hyperglycemic activity.}, doi = {10.1016/j.bcdf.2019.100198}, author = {Mudliyar, Devshri S. and Wallenius, Janne H. and Bedade, Dattatray K. and Singhal, Rekha S. and Madi, Nuri and Shamekh, Salem S.} } @article {45627, title = {Utilization of waste biomass for the synthesis of functionalizable support for covalent anchoring of active organo catalyst}, journal = {ACS Sustainable Chemistry \& Engineering}, volume = {7}, year = {2019}, month = {JAN}, pages = {3018{\textendash}3026}, type = {Article}, abstract = {A single step synthetic procedure for carbon microspheres from agricultural waste residue (sugarcane bagasse) by low-temperature hydrothermal carbonization using oxalic acid as a hydrating/dehydrating agent is developed. The FTIR and XPS spectroscopy analysis indicates the presence of -OH, -COOH, and C=O functional groups on the surfaces of carbon spheres. These functional groups of the carbon spheres were utilized as a novel route to anchor 3-aminopropyl-triethoxysilane and 3-(2-aminoethylamino)propyl)-trimethoxysilane via condensation of triethoxy/trimethoxy silanes for the synthesis of organo base supported on carbon catalysts. The catalytic activity of the obtained supported organo-base catalyst was demonstrated for C{\textendash}C bond forming (Henry) reaction. Among all prepared catalysts, 3-(2-aminoethylaminopropyl)-trimethoxysilane grafted in toluene showed high conversion (up to 100\%) of aldehydes with excellent selectivity toward β-nitrostyrene. The catalyst was reused five times without losing significant activity for the same reaction.}, author = {Doke, D. S. and Advani, J. H. and Naikwadi, D. R. and Gawande, M. B. and Walke, P. and Umbarkar, S. B. and Biradar, A. V.} } @article {47166, title = {Vivo wound healing performance of halloysite clay and gentamicin-incorporated cellulose ether-PVA electrospun nanofiber mats}, journal = {ACS Applied Bio Materials}, volume = {2}, year = {2019}, month = {SEP}, pages = {4324{\textendash}4334}, type = {Article}, abstract = {

Wound healing is a dynamic and complex process that requires a suitable environment to enhance the rapid healing process. In this context, fabrications of nanofibrous materials with antibiotic and antibacterial properties are becoming extremely important. In this present work, we report on the fabrication and characterization of electro-spun cellulose ether-PVA nanofiber mats loaded with halloysite clay (HNT) and gentamicin sulfate (GS) for faster wound healing applications. The morphology of nanofiber mats was examined by SEM and TEM. The average diameter of the nanofiber mats were in the range of 325 {\textpm} 30 nm. The physicochemical characterizations were done by FT-IR and XRD, which reveal the presence of HNT and GS into the nanofibers. The incorporation of halloysite gave good mechanical strength to the nanofiber mats. Swelling studies indicated the hydrophilicity of the mats. In vitro studies revealed that HNTs are nontoxic to L929 fibroblast cells and also promote cell growth and proliferation. The antibacterial property of HNT was also studied. The slow release of GS from the nanofiber mats was observed for a period of 18 days. The in vivo wound healing studies on the wistar rats for 21 days revealed the wound healing faster within 2 weeks by the incorporation of HNT and GS into the nanofiber mats and hence these nanofiber mats show great potential in acute and chronic wound healing applications.

}, doi = {10.1021/acsabm.9b00589}, author = {Wali, Ashwini and Gorain, Mahadeo and Inamdar, Satish and Kundu, Gopal and Badiger, Manohar V.} } @article {46685, title = {CD44, a predominant protein in methylglyoxal-induced secretome of muscle cells, is elevated in diabetic plasma}, journal = {ACS Omega}, volume = {5}, year = {2020}, month = {OCT }, pages = {25016-25028}, type = {Article}, abstract = {

Methylglyoxal (MG), a glycolytic intermediate and reactive dicarbonyl, is responsible for exacerbation of insulin resistance and diabetic complication. In this study, NIG-induced secretome of rat muscle cells was identified and relatively quantified by SWATH-MS. A total of 643 proteins were identified in MG induced{\textquoteright} secretome, of which 82 proteins were upregulated and 99 proteins were downregulated by more than 1.3-fold in SWATH analysis. Further, secretory proteins from the dassical secretory pathway and nonclassical secretory pathway were identified using SignalP and SecretomeP, respectively. A total of 180 proteins were identified with SignalP, and 113 proteins were identified with SecretomeP. The differentially expressed proteins were functionallyannotated by KEGG pathway analysis using Cytoscape soft ware with plugin clusterMaker. The differentially expressed proteins were{\textquoteright}sfound to he involved m various pathways like extracellular matrix (ECM) receptor interaction, leukocyte transendothelial migration, fluid shear tress and atherosclerosis, complement and coagulation cascades, and lysosomal pathway. Since the MG levels are high in diabetic conditions, the presence of MG-induced isecreted proteins was inspected {\textquoteleft}by profiling human plasma of healthy and diabetic subjects (n = 10 each). CD44, a predominant MG -induced secreted protein, was found to be elevated in the diabetic plasma and to have a role in the development of insulin resistance.

}, issn = {2470-1343}, doi = {10.1021/acsomega.0c01318}, author = {Bai, Shakuntala and Chaurasiya, Arvindkumar H. and Banarjee, Reema and Walke, Prachi B. and Rashid, Faraz and Unnikrishnan, Ambika G. and Kulkarni, Mahesh J.} } @article {47006, title = {Dioxolanone-anchored poly(allyl ether)-based cross-linked dual-salt polymer electrolytes for high-voltage lithium metal batteries}, journal = {ACS Applied Materials \& Interfaces}, volume = {12}, year = {2020}, month = {JAN }, pages = {567-579}, type = {Article}, abstract = {

Novel cross-linked polymer electrolytes (XPEs) are synthesized by free-radical copolymerization induced by ultraviolet (UV)-light irradiation of a reactive solution, which is composed of a difunctional poly(ethylene glycol) diallyl ether oligomer (PEGDAE), a monofunctional reactive diluent 4-vinyl-1,3-dioxolan-2-one (VEC), and a stock solution containing lithium salt (lithium bis(trifluoromethanesulfonyl)imide, LiTFSI) in a carbonate-free nonvolatile plasticizer, poly(ethylene glycol) dimethyl ether (PEGDME). The resulting polymer matrix can be represented as a linear polyethylene chain functionalized with cyclic carbonate (dioxolanone) moieties and cross-linked by ethylene oxide units. A series of XPEs are prepared by varying the [O]/[Li] ratio (24 to 3) of the stock solution and thoroughly characterized using physicochemical (thermogravimetric analysis-mass spectrometry, differential scanning calorimetry, NMR, etc.) and electrochemical techniques. In addition, quantum chemical calculations are performed to elucidate the correlation between the electrochemical oxidation potential and the lithium ion-ethylene oxide coordination in the stock solution. Later, lithium bis(fluorosulfonyl)imide (LiFSI) salt is incorporated into the electrolyte system to produce a dual-salt XPE that exhibits improved electrochemical performance, a stable interface against lithium metal, and enhanced physical and chemical characteristics to be employed against high-voltage cathodes. The XPE membranes demonstrated excellent resistance against lithium dendrite growth even after reversibly plating and stripping lithium ions for more than 1000 h with a total capacity of 0.5 mAh cm(-2). Finally, the XPE films are assembled in a lab-scale lithium metal battery configuration by using carbon-coated LiFePO4 (LFP) or LiNi0.8Co0.15Al0.05O2 (NCA) as a cathode and galvanostatically cycled at 20, 40, and 60 degrees C. Remarkably, at 20 degrees C, the NCA-based lithium metal cells displayed excellent cycling stability and good capacity retention (\>50\%) even after 1000 cycles.

}, keywords = {cross-linked polymer electrolyte, dual-salt electrolyte, high-voltage cathode, lithium metal battery, solvent-free photopolymerization}, issn = {1944-8244}, doi = {10.1021/acsami.9b16348}, author = {Vijayakumar, Vidyanand and Diddens, Diddo and Heuer, Andreas and Kurungot, Sreekumar and Winter, Martin and Nair, Jijeesh Ravi} } @article {46937, title = {Effect of aromatic rings and substituent on the performance of lithium batteries with rylene imide cathodes}, journal = {ChemElectroChem}, volume = {7}, year = {2020}, month = {MAR }, pages = {1160-1165}, type = {Article}, abstract = {

Rylene imides (RIs) are attractive organic battery materials because of the inherent modularity of the molecules. While strong aggregation of RIs is disadvantageous for fast lithium-ion transport in the organic active material, decreasing the solubility of the RIs in battery electrolytes is essential to avoid performance fading. Therefore, the design and synthesis of RIs for lithium batteries is a non-trivial task that must, among other considerations, balance lithium-ion transport in the solid material vs. low solubility by controlling aggregation and packing. We have chosen triphenylamine (TPA) as a substituent which disrupts the aggregation but maintains a low solubility due to increased aromaticity of TPA. We have synthesized three RIs with one, two, and four aromatic units in the core. All of them showed stable specific capacity over 300 charge-discharge cycles. The batteries also showed specific capacities close to their theoretical capacities with 97-99 \% coulombic efficiency. The maximum specific energy and specific power were 197 mWh g(-1) and 37 mW g(-1), respectively.

}, keywords = {lithium-ion batteries, organic cathode material, rylene imides, solubility, triphenylamine}, issn = {2196-0216}, doi = {10.1002/celc.202000118}, author = {Aher, Jagdish and Graefenstein, Alexander and Deshmukh, Gunvant and Subramani, Kumar and Krueger, Bastian and Haensch, Mareike and Schwenzel, Julian and Krishnamoorthy, Kothandam and Wittstock, Gunther} } @article {47012, title = {Exploring the pharmacological potentials of biosurfactant derived from planococcus maritimus SAMP MCC 3013}, journal = {Current Microbiology}, volume = {77}, year = {2020}, month = {MAR}, pages = {452-459}, type = {Article}, abstract = {

Therapeutic potential of biosurfactant (BS) has been improved in recent years. Our present study deals with production of BS from Planococcus maritimus SAMP MCC 3013 in a mineral salt medium (MSM) supplemented with glucose (1.5\% w/v). Further, BS has been purified and partially characterized as glycolipid type through our previous publication. Current research article aimed to evaluate biological potential of BS against Mycobacterium tuberculosis, Plasmodium falciparum and cancerous cell lines. Planococcus derived glycolipid BS was found to be a promising inhibitor of M. tuberculosis (MTB) H37Ra at IC50 64.11 +/- 1.64 mu g/mL and MIC at 160.8 +/- 1.64 mu g/mL. BS also showed growth inhibition of P. falciparum at EC50 34.56 +/- 0.26 mu M. Additionally, BS also displayed the cytotoxicity against HeLa (IC50 41.41 +/- 4.21 mu g/mL), MCF-7 (IC50 42.79 +/- 6.07 mu g/mL) and HCT (IC50 31.233 +/- 5.08 mu g/mL) cell lines. Molecular docking analysis was carried for the most popular glycolipid type BS namely Rhamnolipid (RHL) aiming to interpret the possible binding interaction for anti-tubercular and anti-cancer activity. This analysis revealed the involvement of RHL binding with enoyl reductase (InhA) of M. tuberculosis. Docking studies of RHL with tubulin directed several hydrophobic and Vander Waal interactions to exhibit anti-cancer potential. The present study will be helpful for further development of marine bioactive molecules for therapeutic applications. Their anti-tubercular, anti-plasmodial and cytotoxic activities make BS molecules as a noteworthy candidate to combat several diseases. To the best of our knowledge, this is the first report on projecting the pharmacological potential of Planococcus derived BS. Graphic

}, issn = {0343-8651}, doi = {10.1007/s00284-019-01850-1, Early Access Date = JAN 2020}, author = {Waghmode, Samadhan and Swami, Sagar and Sarkar, Dhiman and Suryavanshi, Mangesh and Roachlani, Sneha and Choudhari, Prafulla and Satpute, Surekha} } @article {46850, title = {Functionalized magnetic nanosized materials for efficient biodiesel synthesis via acid-base/enzyme catalysis}, journal = {Green Chemistry}, volume = {22}, year = {2020}, month = {MAY}, pages = {2977-3012}, type = {Review}, abstract = {

According to the principles of green chemistry, the rapid recovery and reuse of catalysts after a catalytic reaction are important factors to realize the sustainable management of chemical production processes. The functionalization of magnetic nanoparticles is the basis for the efficient separation of heterogeneous catalysts from the reaction system by using the magnetic separation technology as well as for effectively bridging heterogeneous and homogeneous catalytic processes. This can considerably improve the production efficiency and reduce energy consumption as well. Owing to important applications as a potential biofuel or fuel additive, the synthesis of biodiesel mainly from low-cost biomass feedstocks has received considerable attention in the current biorefinery research. A simple synthesis process coupled with the application of functionalized magnetic catalysts can remarkably reduce the production cost and minimize waste generation, thereby promoting the potential development of green catalytic processes for the large-scale synthesis of biodiesel. In this review, the preparation methods, structural and performance control, and protection and functionalization of magnetic nanoparticles as well as the consequent catalytic effects in the synthesis of biodiesel (mainly long-chain fatty acid methyl esters) have been reported. In addition, various representative reaction mechanisms are discussed, emphasizing the existing challenges and prospects of industrialization.

}, issn = {1463-9262}, doi = {10.1039/d0gc00924e}, author = {Wang, Anping and Sudarsanam, Putla and Xu, Yufei and Zhang, Heng and Li, Hu and Yang, Song} } @article {46863, title = {Graphene-MnO2 composite supercapacitor material accomplished tactically using liquid-liquid and solid-liquid interface reaction techniques}, journal = {New Journal of Chemistry}, volume = {44}, year = {2020}, month = {MAY}, pages = {6853-6861}, type = {Article}, abstract = {

A novel methodology is described to grow architectures of 3-dimensional graphene nanosheet (GNS)-manganese oxide (MnO2) composite materials to be used in supercapacitors. The in situ growth of the three-dimensional MnO2 fiber-network over the surface of graphene layers is achieved at the solid-liquid interface. The composite electrode shows good electron and charge transfer, rapid plus reversible faradaic reactions and excellent cyclic ability in electrochemical studies. The electrochemical properties of the as-prepared GNS-MnO2/FTO electrode material were assessed by cyclic voltammetry and galvanostatic charge/discharge tests. The specific capacitance of GNS-MnO2 reaches 683 F g(-1) at a current density of 2.2 A g(-1) and shows excellent cycle stability, retaining 96.9\% of its initial capacitance up to 5000 cycles. A coulomb efficiency of about 99\% displayed by the GNS-MnO2/FTO electrode is an excellent performance for a desired supercapacitor material. Herein, the charge storage mechanism in 3-dimensional graphene nanosheet (GNS)-manganese oxide (MnO2) composite is discussed in detail. Furthermore, at an elevated current density of similar to 10.86 A g(-1), a power density of similar to 6.235 kW kg(-1) is achieved, maintaining an energy density of similar to 7.99 kW h kg(-1); thus, it demonstrates promising potential as an electrode material for supercapacitor application.

}, issn = {1144-0546}, doi = {10.1039/c9nj05898b}, author = {Patil, Sagar H. and Gaikwad, Aarti P. and Waghmode, Babasaheb J. and Sathaye, Shivaram D. and Patil, Kashinath R.} } @article {46772, title = {Hexaaminobenzene derived two-dimensional polymer supercapacitor with high specific capacitance and energy density}, journal = {ACS Applied Energy Materials}, volume = {3}, year = {2020}, month = {JUL }, pages = {6352-6359}, type = {Article}, abstract = {

Recent research interest has been shifted toward energy storage devices, especially supercapacitors, which provide high specific power and long cycle life. In this context, two-dimensional organic polymers are a class of versatile materials found to be useful in energy storage applications. However, the performance is not promising due to the low capacitance, energy density, and cyclic stability. Here, we report a two-dimensional polymer derived from hexaaminobenzene and pyromellitic dianhydride and its excellent supercapacitor performance. The specific capacitance of the two-dimensional polymer is found to be 805 F g(-1) at 0.5 A g(-1) current density in galvanostatic charge-discharge, which is the highest among the organic twodimensional polymer and most of the carbon-based materials. The superior performance of the 2D-polymer compared to a model derivative (350 F g(-1) at 0.5 A g(-1) current density) points to the critical role of a 2D-platform to excel. The high energy density, excellent cyclic stability, and low self-discharge rate support the 2D-polymer supercapacitor as a promising candidate for futuristic applications.

}, keywords = {2D-polymer, energy density, Energy storage, hexaaminobenzene, supercapacitor}, issn = {2574-0962}, doi = {10.1021/acsaem.0c00569}, author = {Wakchaure, Vivek C. and Kottaichamy, Alagar R. and Nidhankar, Aakash D. and Ranjeesh, Kayaramkodath C. and Nazrulla, Mohammed A. and Thotiyl, Musthafa O. and Babu, Sukumaran S.} } @article {46845, title = {Hierarchical nanoflower arrays of Co9S8-Ni3S2 on nickel foam: a highly efficient binder-free electrocatalyst for overall water splitting}, journal = {Chemistry-A European Journal}, volume = {26}, year = {2020}, month = {JUN }, pages = {7900-7911}, type = {Article}, abstract = {

Hydrogen production is vital for meeting future energy demands and managing environmental sustainability. Electrolysis of water is considered as the suitable method for H-2 generation in a carbon-free pathway. Herein, the synthesis of highly efficient Co9S8-Ni3S2 based hierarchical nanoflower arrays on nickel foam (NF) is explored through the one-pot hydrothermal method (Co9S8-Ni3S2/NF) for overall water splitting applications. The nanoflower arrays are self-supported on the NF without any binder, possessing the required porosity and structural characteristics. The obtained Co9S8-Ni3S2/NF displays high hydrogen evolution reaction (HER), as well as oxygen evolution reaction (OER), activities in 1 m KOH solution. The overpotentials exhibited by this system at 25 mA cm(-2) are nearly 277 and 102 mV for HER and OER, respectively, in 1 m KOH solution. Subsequently, the overall water splitting was performed in 1 m KOH solution by employing Co9S8-Ni3S2/NF as both the anode and cathode, where the system required only 1.49, 1.60, and 1.69 V to deliver the current densities of 10, 25, and 50 mA cm(-2), respectively. Comparison of the activity of Co9S8-Ni3S2/NF with the state-of-the-art Pt/C and RuO2 coated on NF displays an enhanced performance for Co9S8-Ni3S2/NF both in the half-cell as well as in the full cell, emphasizing the significance of the present work. The post analysis of the material after water electrolysis confirms that the surface Co(OH)(2) formed during the course of the reaction serves as the favorable active sites. Overall, the activity modulation achieved in the present case is attributed to the presence of the open-pore morphology of the as formed nanoflowers of Co9S8-Ni3S2 on NF and the simultaneous presence of the surface Co(OH)(2) along with the highly conducting Co9S8-Ni3S2 core, which facilitates the adsorption of the reactants and subsequently its conversion into the gaseous products during water electrolysis.

}, keywords = {cobalt sulfide, electrocatalysts, Hydrogen evolution, overall water splitting, oxygen evolution}, issn = {0947-6539}, doi = {10.1002/chem.202000839, Early Access Date = MAY 2020}, author = {Illathvalappil, Rajith and Walko, Priyanka S. and Kanheerampockil, Fayis and Bhat, Suresh K. and Devi, R. Nandini and Kurungot, Sreekumar} } @article {46602, title = {Highly reproducible, simple and selective analytical method for extractive UV-visible spectrophotometric determination of ruthenium (III): analysis of catalyst, fissium alloy and sequential separation}, journal = {Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy}, volume = {243}, year = {2020}, month = {DEC}, pages = {118814}, type = {Article}, abstract = {

An easy and selective method has been developed for the extractive spectrophotometric determination of ruthenium(III) with 4-(4{\textquoteright}-flurobenzylideneimino)-3-methyl-5-mercapto-1,2,4-triazole (FBIMMT) as a chelating reagent. The basis of the method is the formation of stable complex of {\textquoteleft}soft base{\textquoteright} FBIMMT with {\textquoteleft}soft acid{\textquoteright} ruthenium(M). The reagent FBIMMT in n-butanol easily forms extractable yellow coloured complex with ruthenium(III) in acetate buffer of pH 4.8. The absorbance of [Ru(III)-FBIMMT] complex is measured at 394 nm against the reagent blank. Good linearity range of concentration up to 27.0 mu g mL(-1) of ruthenium(III) is attained with correlation coefficient R-2 = 0.998. The optimum concentration range is 6 to 27.0 mu g mL(-1) which is deduced by Ringbom{\textquoteright}s plot. The apparent molar absorptivity found to be 2.75 x 10(3) L mol(-1) cm(-1). Some additional characteristics such as limit of detection (LOD = 0.48 mu g mL(-1)), limit of quantification (LOQ = 1.19 mu g mL(-1)), and Sandell{\textquoteright}s sensitivity (SS = of 0.0367 mu g cm(-2)) arc also estimated. The composition of [Ru (III)-FBIMMT1 complex has been established from Job{\textquoteright}s continuous variation method, mole ratio method, and log-log plot method. The specificity towards ruthenium(III) is well studied and appropriate masking agents are applied wherever required to boost it. The intra-day and inter-day precision values are found to be brilliant with \% relative standard deviation of 0.52 and 0.68 respectively with \% accuracy within the range of 99.00-100. The method is effectively used for determination of ruthenium(III) from water samples, binary and ternary synthetic mixtures, fissium alloy samples and catalyst materials. A scheme for sequential group separation of ruthenium(III), palladium(II) and osmium (VIII) has also been developed. The reproducible results of the present method confirm that the method has a good potential for quantitative determination of ruthenium(III) from various matrices. (C) 2020 Elsevier B.V. All rights reserved.

}, keywords = {Alloy samples, FBIMMT, Ruthenium(III), Spectrophotometric determination, Synthetic mixtures}, issn = {1386-1425}, doi = {10.1016/j.saa.2020.118814}, author = {Shaikh, Abdul B. and Barache, Umesh B. and Khogare, Balaji T. and Goswami, Ritusmita and Kokare, Balasaheb N. and Wadgaonkar, Prakash P. and Gaikwad, Shashikant H.} } @article {46761, title = {In situ cross-linked nonaqueous polymer electrolyte for zinc-metal polymer batteries and hybrid supercapacitors}, journal = {Small}, volume = {16}, year = {2020}, month = {SEP}, pages = {2002528}, type = {Article}, abstract = {

This work reports the facile synthesis of nonaqueous zinc-ion conducting polymer electrolyte (ZIP) membranes using an ultraviolet (UV)-light-induced photopolymerization technique, with room temperature (RT) ionic conductivity values in the order of 10(-3)S cm(-1). The ZIP membranes demonstrate excellent physicochemical and electrochemical properties, including an electrochemical stability window of \>2.4 V versus Zn|Zn(2+)and dendrite-free plating/stripping processes in symmetric Zn||Zn cells. Besides, a UV-polymerization-assisted in situ process is developed to produce ZIP (abbreviated i-ZIP), which is adopted for the first time to fabricate a nonaqueous zinc-metal polymer battery (ZMPB; VOPO4|i-ZIP|Zn) and zinc-metal hybrid polymer supercapacitor (ZMPS; activated carbon|i-ZIP|Zn) cells. The VOPO(4)cathode employed in ZMPB possesses a layered morphology, exhibiting a high average operating voltage of approximate to 1.2 V. As compared to the conventional polymer cell assembling approach using the ex situ process, the in situ process is simple and it enhances the overall electrochemical performance, which enables the widespread intrusion of ZMPBs and ZMPSs into the application domain. Indeed, considering the promising aspects of the proposed ZIP and its easy processability, this work opens up a new direction for the emergence of the zinc-based energy storage technologies.

}, keywords = {nonaqueous electrolytes, polymer electrolytes, postlithium batteries, Supercapacitors, zinc-metal batteries}, issn = {1613-6810}, doi = {10.1002/smll.202002528, Early Access Date = JUL 2020}, author = {Vijayakumar, Vidyanand and Ghosh, Meena and Kurian, Maria and Torris, Arun and Dilwale, Swati and Badiger, V. Manohar and Winter, Martin and Nair, Jijeesh Ravi and Kurungot, Sreekumar} } @article {47001, title = {Influence of the ion size on the stability of the smectic phase of ionic liquid crystals}, journal = {Soft Matter}, volume = {16}, year = {2020}, month = {JAN}, pages = {411-420}, type = {Article}, abstract = {

The thermotropic phase behavior of ionic liquids and ionic liquid crystals based on novel N-alkyl-3-methylpyridinium halides, trihalides and dichloroiodates was experimentally studied by polarized optical spectroscopy (POM) and differential scanning calorimetry (DSC) as well as by molecular dynamics (MD) simulation. In the experiments, the existence and thermal range of stability of the smectic phase of these ionic liquid crystals are found to strongly depend on the volume ratio between the cation and anion, that is their relative size. Only compounds with a relatively large volume ratio of the cation to anion, i.e., those with longer cationic alkyl chains and monoatomic halide anions, have a stable smectic A phase. Both melting points and clearing points increase with such a ratio. The MD simulation results qualitatively agree very well with the experimental data and provide molecular details which can explain the experimentally observed phenomena: the stronger van der Waals interactions from the longer alkyl chains and the stronger electrostatic interactions from the smaller anions with a higher charge density increase the stability of both the crystal phase and the smectic phase; this also prevents the ionic layers from easily mixing with the hydrophobic regions, a mechanism that ultimately leads to a nanosegregated isotropic liquid phase.

}, issn = {1744-683X}, doi = {10.1039/c9sm02115a}, author = {Cao, Wudi and Senthilkumar, Beeran and Causin, Valerio and Swamy, Vincent P. and Wang, Yanting and Saielli, Giacomo} } @article {46672, title = {Inhibition of quorum sensing, motility and biofilm formation ofpseudomonas aeruginosaby copper oxide nanostructures}, journal = {Journal of Cluster Science}, volume = {32}, year = {2020}, month = {OCT}, pages = {1531 - 1541}, type = {Article; Early Access}, abstract = {

Quorum sensing (QS) is the communication between bacterial cells governed by their population density and regulated by the genes controlling virulence factors and biofilm formation. Multiple mechanisms of biofilms are resistive to antimicrobial chemotherapy; therefore novel strategies are required to overcome its limitations. Here, we report the effect of various copper oxide nanostructures (CuO-NSs) on quorum sensing inhibition. The two-dimensional CuO-NSs such as interlaced nanodiscs, nanodiscs and leaf-shaped nanosheets are prepared via a simple chemical method. The Quorum sensing inhibition (QSI) activity of all the CuO-NS are examined using reporter strainChromobacterium violaceumCV026 andEscherichia colipSB1142. We found that the CuO-interlaced nanodisc structures exhibit better QSI activity than nanodiscs and leaf-shaped sheets. The interlaced nanodisc structures are inhibited various long-chainN-acyl homoserine lactones (AHLs) mediated QS individually and confirmed by other QS-associated phenomena forPseudomonas aeruginosa, including biofilm inhibition, inhibition of virulence factors such as pyocyanin, protease production and swarming motility. Thus QSI activity of CuO-NSs is solely dependent on specific shape offering large surface area and more active sites. The CuO-NS is effective quorum sensing inhibitors, which has potential clinical applications in the management ofP. aeruginosaassociated infections.

}, keywords = {aeruginosa, Biofilm, Nanostructures, P, quorum sensing, Virulence factors}, isbn = {1572-8862}, issn = {1040-7278}, doi = {10.1007/s10876-020-01916-2}, author = {Desai, Dnyanada G. and Swarali, H. and Navale, Govinda R. and Prabhune, A. and Late, Dattatray J. and Dharne, Mahesh S. and Walke, Pravin S.} } @article {46757, title = {Lipid-dependent conformational landscape of the ErbB2 growth factor receptor dimers}, journal = {Chemistry and Physics of Lipids}, volume = {230}, year = {2020}, month = {AUG}, pages = {104911}, type = {Article}, abstract = {

Altered lipid metabolism has been linked to cancer development and progression. Several roles have been attributed to the increased saturation and length of lipid acyl tails observed in tumors, but its effect on signaling receptors is still emerging. In this work, we have analyzed the lipid dependence of the ErbB2 growth factor receptor dimerization that plays an important role in the pathogenesis of breast cancer. We have performed coarse-grain ensemble molecular dynamics simulations to comprehensively sample the ErbB2 monomer-dimer association. Our results indicate a dynamic dimer state with a complex conformational landscape that is modulated with increasing lipid tail length. We resolve the native N-terminal {\textquoteleft}{\textquoteleft}active{\textquoteright}{\textquoteright} and C-terminal {\textquoteleft}{\textquoteleft}inactive{\textquoteright}{\textquoteright} conformations in all membrane compositions. However, the relative population of the N-terminal and C-terminal conformers is dependent on length of the saturated lipid tails. In short-tail membranes, additional non-specific dimers are observed which are reduced or absent in long-tailed bilayers. Our results indicate that the relative population as well as the structure of the dimer state is modulated by membrane composition. We have correlated these differences to local perturbations of the membrane around the receptor. Our work is an important step in characterizing ErbB dimers in healthy and diseased states and emphasize the importance of sampling lipid dynamics in understanding receptor association.

}, keywords = {ErbB2 dimer, Lipid effects, Martini coarse-grained simulations, Membrane protein structure, Transmembrane association}, issn = {0009-3084}, doi = {10.1016/j.chemphyslip.2020.104911}, author = {Gopal, Srinivasa M. and Pawar, Aiswarya B. and Wassenaar, Tsjerk A. and Sengupta, Durba} } @article {46751, title = {Nonenzymatic glucose detection in human serum using Ni nanoparticles decorated reduced graphene oxide}, journal = {Science of Advanced Materials}, volume = {12}, year = {2020}, month = {AUG}, pages = {1125-1136}, type = {Article}, abstract = {

Reduced Graphene oxide (RGO) decorated with Ni nanoparticles (NiNPs) composites, have been successfully synthesized using a simple hydrothermal method and possessing excellent electrocatalytic activity towards glucose oxidation. The morphological and structural features of RGO-Ni nanocomposites were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS). From TEM, we observed that NiNPs were anchored on RGO sheets. Cyclic Voltammetric (CV) study revealed that the electrocatalytic activity of RGO-Ni nanocomposite with 20\% Ni loading (RGONi-20) towards glucose oxidation is better than that shown by bare Glassy Carbon Electrode (GCE), RGO, bare NiNPs, RGONi10 and RGONi-30. The prepared nanocomposites exhibited fast electrocatalytic response (\<5 s) towards glucose oxidation. Amperometric study indicates that the present glucose sensor have exhibited excellent performance by offering a lowest detection limit as 5.1 mu M, with linier range from 2 to 5000 mu M and high sensitivity of 896.67 mu A mM(-1) cm(-2). Interference from different anticipatable electroactive substances such as ascorbic acid (AA), uric acid (UA) and dopamine (DA) is not observed. Furthermore, the application of the as prepared sensor was successfully demonstrated for the detection of glucose in human serum and results were comparable to presently used nonenzymatic technique. RGONi-20 nanocomposite electrode holds great promise for the development of biosensors and other electrochemical devices.

}, keywords = {Electrochemical, Glucose Sensor, Graphene-Nickel Nanoparticles, hydrothermal, Nanocomposite, Nonenzymatic}, issn = {1947-2935}, doi = {10.1166/sam.2020.3776}, author = {Waichal, Rupali and Bhirud, Ashwini and Fouad, H. and Gosavi, Suresh and Ashokkumar, Muthupandian} } @article {46894, title = {Novel cilengitide-based cyclic RGD peptides as alpha nu beta(3) integrin inhibitors}, journal = {Bioorganic \& Medicinal Chemistry Letters}, volume = {30}, year = {2020}, month = {APR}, pages = {127039}, type = {Article}, abstract = {

In this letter, we report a series of five new RGD-containing cyclic peptides as potent inhibitors to alpha nu beta(3) integrin protein. We have incorporated various unnatural lipophilic amino acids into the cyclic RGD framework of cilengitide, which is selective for alpha nu beta(3) integrin. All the newly synthesized cyclic peptides were evaluated in vitro solid phase binding assay and investigated for their binding behaviour towards integrin subtypes. All the cyclic peptides were synthesized in excellent yield following solution-phase coupling strategy. The cyclic RGD peptides 1a-e exhibited IC50 of 9.9, 5.5, 72, 11 and 3.3 nM, respectively, towards a alpha nu beta(3) integrin protein. This finding offers further opportunities for the introduction unusual amino acids into the cyclic peptide framework of cilengitide.

}, keywords = {Anticancer drugs, Cilengitide, Integrins, RGD cyclicpeptides}, issn = {0960-894X}, doi = {10.1016/j.bmcl.2020.127039}, author = {Meena, Chhuttan L. and Singh, Dharmendra and Weinmueller, Michael and Reichart, Florian and Dangi, Abha and Marelli, Udaya Kiran and Zahler, Stefan and Sanjayan, Gangadhar J.} } @article {46973, title = {One-pot synthesis of bimodal (macro-meso, micro-mesoporous) silica by polyHIPE: parameter studies}, journal = {Journal of Porous Materials}, volume = {27}, year = {2020}, month = {FEB}, pages = {263-275}, type = {Article}, abstract = {

Porous silica with hierarchical organization of pore structure is desired for a variety of applications such as, chromatography, sensing, control release, scaffold for biomedical applications and catalysis. Highly porous polymers obtained from high internal phase emulsion (HIPE) templating route have attracted increasing attention of researchers due to their hierarchical porous and interconnected structure with high porosity and low density. The novel method adopted in our approach combines redox initiated polymerization using HIPE polymerization and an in-situ sol-gel processing technique followed by calcination to obtain highly porous materials. The obtained materials have reminiscent of polyHIPE morphology containing pores and interconnected pore throats in micrometer size range with mesopores on the wall of macropores. The effect of concentration of TEOS, volume of dispersed phase, crosslinker concentration, shear rate and surfactant concentration as well as variation in calcination temperatures on the properties of silica materials were examined.

}, keywords = {Mesoporous material, PolyHIPE, Polymer-silica hybrid, Porous silica}, issn = {1380-2224}, doi = {10.1007/s10934-019-00807-w}, author = {Wale, Apparav and Nalawade, Archana and Ponrathnam, Surendra and Rajan, C. R. and Badiger, Manohar} } @article {46866, title = {Phenylboronic acid-catalyzed tandem construction of S-S and C-S bonds: a new method for the synthesis of benzyl disulfanylsulfone derivatives from S-benzyl thiosulfonates}, journal = {Organic \& Biomolecular Chemistry}, volume = {18}, year = {2020}, month = {MAY }, pages = {3243-3248}, type = {Article}, abstract = {

A unique phenylboronic acid-catalyzed dimerization-sulfonylation of S-benzyl thiosulfonates has been disclosed. A metal-free tandem construction of S-S and C-S bonds is an operationally simple method to access a wide range of benzyl disulfanylsulfone derivatives in high to excellent yields. Moreover, the robustness of this tandem transformation has been demonstrated by gram-scale reactions, and a plausible mechanism is also proposed.

}, issn = {1477-0520}, doi = {10.1039/d0ob00442a}, author = {Reddy, Raju Jannapu and Waheed, Md and Krishna, Gamidi Rama} } @article {47137, title = {Simultaneous identification and estimation of glycyrrhizin, glabridin, and 18β-glycyrrhetinic acid in de-glycyrrhized Ayurvedic lipid-based formulation of Glycyrrhiza glabra using dual wavelength reverse phase-high-performance liquid chromatography }, journal = {Separation Science Plus}, volume = {3}, year = {2020}, month = {AUG}, pages = {460-471}, abstract = {

Plant-based Ayurvedic formulations such as medicated oils, confectioneries, etc. are developed with a rationale of selecting specific compounds for targeted action and minimal side effects. It is imperative to develop an analytical method to simultaneously identify and quantify the targeted compounds for good resolution with low retention time. The present assay using reverse phase-high-performance liquid chromatography is optimized to resolve glycyrrhizin, glabridin, and 18β-glycyrrhetinic acid simultaneously at retention times of 6.6, 8.1, and 10.2\ min, respectively, using acidified mobile phase from Glycyrrhiza glabra utilized in Ayurvedic lipid (cow{\textquoteright}s ghee and sesame oil) based formulations. Raw material, its decoction, and residues formed during preparation steps were extracted in methanol while lipid formulations were extracted using a binary solvent system of methanol and n-hexane. The separation was performed on Hypersil gold column maintained at 40{\textdegree}C using 0.2\% ortho-phosphoric acid with pH 3.5 in water and acetonitrile as binary gradient mobile phase. The compounds were detected at wavelengths 230 (glabridin) and 254 (glycyrrhizin and 18β-glycyrrhetinic acid) nm. The method revealed de-glycyrrhized finished products containing glabridin and 18β-glycyrrhetinic acid having medicinal value.

}, doi = {10.1002/sscp.202000015}, author = {Kumbhalkar, Bhagyashri and Walunj, Tanhaji and Chavan, Sandeep and Gupta, Vidya and Deshmukh, Vineeta and Sardeshmukh, Sadanand} } @article {46969, title = {Stress-induced electronic structure modulation of manganese-incorporated Ni2P leading to enhanced activity for water splitting}, journal = {ACS Applied Energy Materials}, volume = {3}, year = {2020}, month = {FEB}, pages = {1271-1278}, type = {Article}, abstract = {

The cornerstone of the emerging hydrogen economy is hydrogen production by water electrolysis with concomitant oxygen generation. Incorporating a third element in metal phosphides can tune the crystalline and electronic structure, hence improving the electrocatalytic properties. In this work, Mn-doped Ni2P with varying ratios of Mn and Ni has been explored as excellent catalysts for water splitting. A complete cell made of the best catalyst Ni1.5Mn0.5P electrodes showed low voltage of 1.75 V at a current density of 10 mA cm(-2) due to enhanced electrical conductivity, induction of tensile stress, enhanced electrochemical surface area, and increased electric dipole upon Mn incorporation.

}, keywords = {Electronic Structure, hydrogen evolution reaction, Oxygen Evolution Reaction, phosphides, water splitting}, issn = {2574-0962}, doi = {10.1021/acsaem.9b02097}, author = {Sarkar, Shreya and Dheer, Lakshay and Vinod, C. P. and Thapa, Ranjit and Waghmare, V. Umesh and Peter, Sebastian C.} } @article {46735, title = {Synthesis and antimycobacterial screening of new 4-(4-(1-benzyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-3-yl)quinoline derivatives}, journal = {Journal of Heterocyclic Chemistry}, volume = {57}, year = {2020}, month = {NOV}, pages = {3918-3929}, type = {Article}, abstract = {

A new series of 4-(4-(1-benzyl-1H-1,2,3-triazol-4-yl)-1-phenyl-1H-pyrazol-3-yl)quinoline (6a-t) have been synthesized by a click reaction of 4-(4-ethynyl-1-phenyl-1H-pyrazol-3-yl)quinoline (4a-d) with a substituted benzyl azide (5a-e). The starting alkyne derivatives4a-dare obtained from Bestmann-Ohira reaction of 1-phenyl-3-(quinolin-4-yl)-1H-pyrazole-4-carbaldehyde and dimethyl(1-diazo-2-oxopropyl)phosphonate. The newly synthesized compounds are screened againstM. tuberculosisH37Ra dormant and active,Escherichia coli,Pseudomonas fluorescence,Staphylococcus aureusandBacillus subtilisstrains at 30 mu g/mL concentration. Most of the screened compounds showed good to moderate antibacterial activity againstS. aureus,B. subtilis, andMycobacterium tuberculosisH37Ra strains. The synthesized derivatives of quinolinyl-pyrazole-4-carbaldehyde and quinolinyl-pyrazole-4-ethyne reportd good to moderate activity against both strains ofM. tuberculosisH37Ra. Ten derivatives of quinolinyl-pyrazole presented good activity againstB. subtilis. These results suggested that further optimization and development of quinolinyl-pyrazolyl-1,2,3-triazole moeity could serve as lead compounds for antimycobacterial activity.

}, issn = {0022-152X}, doi = {10.1002/jhet.4101, Early Access Date = AUG 2020}, author = {Thakare, Prashant P. and Walunj, Yogesh and Chavan, Abhijit and Bobade, Vivek D. and Sarkar, Dhiman and Mhaske, Pravin C.} } @article {47581, title = {Antimicrobial and antioxidant potential of a standardized ayurvedic formulation explains its clinical efficacy as gargles in post-radiotherapy oral cancer patients}, journal = {Journal of Herbal Medicine}, volume = {30}, year = {2021}, month = {DEC}, pages = {100510}, type = {Article}, abstract = {Introduction: Exploring the antioxidant and antimicrobial potential of a standardized proprietary poly-herbal powder and evaluating its clinical efficacy as an Ayurvedic gargle (Gandush) for reducing oral microbial load and side effects of radiotherapy in oral cavity cancer patients was the aim of this pilot study. Methods: Formulation (Gandush Churna) comprising Terminalia chebula Retz., Terminalia bellirica (Gaertn.) Roxb., Phyllanthus emblica L. and Curcuma longa L. and its decoction (Gandush Kwath) were standardized. In-vitro antioxidant potential and antimicrobial activity against selective bacterial and fungal strains were studied. Oral cavity cancer patients who had undergone radiotherapy were enrolled. The decoction was prepared by soaking Gandush Churna in water, boiling and reducing by 50 \%; and was used for gargling, twice a day, for 7 days. Total microbial count and identification of microbiota in the oral cavity as well as symptoms graded as per Common Terminology Criteria for Adverse Events, were noted before and after the treatment. Change in microbial load and shift in symptom gradations were analyzed. Results: A monograph with physicochemical, chromatography, safety and stability parameters was developed. The decoction possessed good in-vitro antioxidant and antimicrobial activities. Gargling therapy significantly reduced bacterial load while mildly controlled the fungal infection in oral cavity cancer patients. It significantly reduced the severity of symptoms viz. stomatitis and local pain, with considerably decreased xerostomia and dysphagia. Conclusions: Intervention of gargle therapy using poly-herbal formulation may serve as an effective complementary treatment to improve oral hygiene and reduce side effects of radiotherapy in oral cancer patients.}, keywords = {Anti-microbial, Antioxidant, Gandush, Gargle therapy, Oral cavity cancers, Radiotherapy side effects}, issn = {2210-8033}, doi = {10.1016/j.hermed.2021.100510}, author = {Chavan, Sandeep and Bhuvad, Sushama and Kumbhlakar, Bhagyashri and Auti, Jyoti and Walunj, Tanhaji and Pathak, Shridevi and Tanpure, Rahul and Gujar, Shweta and Shinde, Jagdish and Kulkarni, Arvind and Gupta, Vidya and Deshmukh, Vineeta and Sardeshmukh, Sadanand} } @article {46754, title = {Bimetallic Ni-Pd synergism-mixed metal catalysis of the mizoroki-heck reaction and the suzuki-miyaura coupling of aryl bromides}, journal = {Catalysis Letters}, volume = {151}, year = {2021}, month = {FEB}, pages = {353-358}, type = {Article}, abstract = {

A combination of Pd and Ni complexes activated aryl bromides for the thermal Mizoroki-Heck reaction and Suzuki coupling giving high yields in short reaction times. A thermal redox mechanism probably occurs whereby Ni complex transfers electron and reduces the Pd (II) to Pd (0) which then takes the reactants through the standard protocol of oxidative-addition, migratory insertion and reductive elimination, typical for the Mizoroki-Heck reaction and the Suzuki coupling. [GRAPHICS] .

}, keywords = {Bimetallic catalysis, Mizoroki-Heck, Nickel complexes, Pd(OAc)2, Suzuki coupling}, issn = {1011-372X}, doi = {10.1007/s10562-020-03330-9, Early Access Date = AUG 2020}, author = {Kashid, Abhijit A. and Patil, Dharmaraj J. and Mali, Ramling D. and Patil, Vijay P. and Neethu, T. V. and Meroliya, Heena K. and Waghmode, Shobha A. and Iyer, Suresh} } @article {47794, title = {Bimetallic Ni{\textendash}Pd synergism{\textemdash}mixed metal catalysis of the mizoroki-heck reaction and the suzuki{\textendash}miyaura coupling of aryl bromides}, journal = {Catalysis Letters}, volume = {151}, year = {2021}, month = {FEB}, pages = {353 - 358}, type = {Article}, abstract = {A combination of Pd and Ni complexes activated aryl bromides for the thermal Mizoroki-Heck reaction and Suzuki coupling giving high yields in short reaction times. A thermal redox mechanism probably occurs whereby Ni complex transfers electron and reduces the Pd (II) to Pd (0) which then takes the reactants through the standard protocol of oxidative-addition, migratory insertion and reductive elimination, typical for the Mizoroki-Heck reaction and the Suzuki coupling.}, isbn = {1572-879X}, doi = {10.1007/s10562-020-03330-9}, author = {Kashid, Abhijit A. and Patil, Dharmaraj J. and Mali, Ramling D. and Patil, Vijay P. and Neethu, T. V. and Meroliya, Heena K. and Waghmode, Shobha A. and Iyer, Suresh} } @article {46671, title = {Biological process of lysine-tRNA charging is therapeutically targetable in liver cancer}, journal = {Liver International}, volume = {41}, year = {2021}, month = {JAN }, pages = {206-219}, type = {Article }, abstract = {

Background \& Aims Mature transfer RNAs (tRNA) charged with amino acids decode mRNA to synthesize proteins. Dysregulation of translational machineries has a fundamental impact on cancer biology. This study aims to map the tRNAome landscape in liver cancer patients and to explore potential therapeutic targets at the interface of charging amino acid with tRNA. Methods Resected tumour and paired tumour-free (TFL) tissues from hepatocellular carcinoma (HCC) patients (n = 69), and healthy liver tissues from organ transplant donors (n = 21), HCC cell lines, and cholangiocarcinoma (CC) patient-derived tumour organoids were used. Results The expression levels of different mature tRNAs were highly correlated and closely clustered within individual tissues, suggesting that different members of the tRNAome function cooperatively in protein translation. Interestingly, high expression of tRNA-Lys-CUU in HCC tumours was associated with more tumour recurrence (HR 1.1;P = .022) and worse patient survival (HR 1.1;P = .0037). The expression of Lysyl-tRNA Synthetase (KARS), the enzyme catalysing the charge of lysine to tRNA-Lys-CUU, was significantly upregulated in HCC tumour tissues compared to tumour-free liver tissues. In HCC cell lines, lysine deprivation, KARS knockdown or treatment with the KARS inhibitor cladosporin effectively inhibited overall cell growth, single cell-based colony formation and cell migration. This was mechanistically mediated by cell cycling arrest and induction of apoptosis. Finally, these inhibitory effects were confirmed in 3D cultured patient-derived CC organoids. Conclusions The biological process of charging tRNA-Lys-CUU with lysine sustains liver cancer cell growth and migration, and is clinically relevant in HCC patients. This process can be therapeutically targeted and represents an unexplored territory for developing novel treatment strategies against liver cancer.

}, keywords = {Cladosporin, liver cancer, lysine, Lysyl-tRNA Synthetase, tRNA-Lys-CUU, tRNAome}, issn = {1478-3223}, doi = {10.1111/liv.14692}, author = {Zhang, Ruyi and Noordam, Lisanne and Ou, Xumin and Ma, Buyun and Li, Yunlong and Das, Pronay and Shi, Shaojun and Liu, Jiaye and Wang, Ling and Li, Pengfei and Verstegen, Monique M. A. and Reddy, D. Srinivasa and van Der Laan, Luc J. W. and Peppelenbosch, Maikel P. and Kwekkeboom, Jaap and Smits, Ron and Pan, Qiuwei} } @article {47572, title = {Construction of beta-cyclodextrin linked glycidyl methacrylate polymers for stereoselective separation of chiral drug}, journal = {Journal of Polymer Research}, volume = {28}, year = {2021}, month = {AUG}, pages = {287}, type = {Article}, abstract = {In this present study, a series of cross-linked porous polymers based on Glycidyl Methacrylate (GMA) were synthesized by suspension polymerization using cyclohexanol and hexanol as pore generating solvents. beta-cyclodextrin (beta-CD) was covalently bonded to the polymers by using Hexamethylene Diisocyanate (HMDI) and Sebacoyl Chloride (SC) as spacer arms. The effects of matrix properties such as pore volume, type of crosslinker, and spacer on the loading of beta-cyclodextrin were investigated. The stereoselective binding of enantiomers of the anti-depressant drug citalopram was studied using beta-cyclodextrin loaded polymers under batch adsorption mode. The capacity factor and selectivity of isomers were investigated also. This study reveals that these beta-cyclodextrin bonded Glycidyl Methacrylate (GMA) polymers are potentially suitable for chromatographic separation of citalopram.}, keywords = {beta-cyclodextrin, Citalopram, Glycidyl Methacrylate (GMA) beads, HPLC etc, Stereoslelctivity}, issn = {1022-9760}, doi = {10.1007/s10965-021-02634-7}, author = {Wale, Apparav and Mulani, Khudbudin and Deshpande, Supriya and Rajan, C. R. and Ponrathnam, Surendra} } @article {47739, title = {Continuous citrate-capped gold nanoparticle synthesis in a two-phase flow reactor}, journal = {Journal of Flow Chemistry}, volume = {11}, year = {2021}, month = {SEP}, pages = {553-567}, type = {Article}, abstract = {A continuous manufacturing platform was developed for the synthesis of aqueous colloidal 10-20 nm gold nanoparticles (Au NPs) in a flow reactor using chloroauric acid, sodium citrate and citric acid at 95 degrees C and 2.3 bar(a) pressure. The use of a twophase flow system - using heptane as the continuous phase - prevented fouling on the reactor walls, while improving the residence time distribution. Continuous syntheses for up to 2 h demonstrated its potential application for continuous manufacturing, while live quality control was established using online UV-Vis photospectrometry that monitored the particle size and process yield. The synthesis was stable and reproducible over time for gold precursor concentration above 0.23 mM (after mixing), resulting in average particle size between 12 and 15 nm. A hydrophobic membrane separator provided successful separation of the aqueous and organic phases and collection of colloidal Au NPs in flow. Process yield increased at higher inlet flow rates (from 70\% to almost 100 \%), due to lower residence time of the colloidal solution in the separator resulting in less fouling in the PTFE membrane. This study addresses the challenges for the translation of the synthesis from batch to flow and provides tools for the development of a continuous manufacturing platform for gold nanoparticles.}, keywords = {Continuous manufacturing, Nanomaterials, Online analysis, phase separation, segmented flow}, issn = {2062-249X}, doi = {10.1007/s41981-021-00172-3}, author = {Damilos, Spyridon and Alissandratos, Ioannis and Panariello, Luca and Radhakrishnan, Anand N. P. and Cao, Enhong and Wu, Gaowei and Besenhard, Maximilian O. and Kulkarni, Amol A. and Makatsoris, Charalampos and Gavriilidis, Asterios} } @article {47787, title = {Convenient and mild protocol for preparation of α {\textendash}trimethylsilyloxyphosphonates using sulfamic acid and their oxidation to α {\textendash} ketophosphonates in the presence of N-bromosuccinimide}, journal = {Arkivoc}, volume = {2021}, year = {2021}, month = {SEP}, type = {Article}, abstract = {A convenient and mild protocol was developed for the trimethylsilylation of α-hydroxyphosphonates using hexamethyldisilazane as the silylating agent in the presence of sulfamic acid (SA) as a heterogeneous solid acid catalyst in dichloromethane as the reaction medium. The utility of SA as the catalyst for deprotection of α-trimethylsilyloxyphosphonates to parent α-hydroxyphosphonates by making a switch to a protic solvent such as methanol was also demonstrated. Furthermore, the oxidation of α{\textendash}trimethylsilyloxyphosphonates to corresponding α{\textendash}ketophosphonates was achieved in excellent yields employing N-bromosuccinimide in the presence of catalytic quantity of AIBN.}, doi = {10.24820/ark.5550190.p011.603}, author = {Mitragotri, Satish and Kulkarni, Makarand and Desai, Uday and Wadagaonkar, Prakash} } @article {47591, title = {Design and scale-up of continuous di-nitration reaction using pinched tube flow reactor}, journal = {Journal of Flow Chemistry}, volume = {11}, year = {2021}, month = {SEP}, pages = {611-624}, type = {Article}, abstract = {Scale-up of the di-nitration reaction for synthesis of selective herbicide pendimethalin using only nitric acid in continuous flow is presented in this work. This work showcases an approach for smooth scale-up for an herbicide for a production capacity of 50 kg/day using a pinched tube reactor. The approach begins with the batch experiments followed by flow synthesis using a 1/8-inchSS316 helical coil tube where kinetics of the di-nitration was determined, and process optimization was done. Systematic approach was followed for quantification of heat transfer, mass transfer and residence time distribution and scale-up. Detailed scale-up methodology is presented with effect of relevant parameters for successful scale-up. Modular pilot plant with inline quenching, extraction and separation are some of the salient features presented in this work.}, keywords = {continuous flow, nitration, Pinched tube, RTD, scale-up}, issn = {2062-249X}, doi = {10.1007/s41981-021-00182-1}, author = {Hussain, Arshad and Sharma, Mrityunjay and Patil, Suneha and Acharya, Roopashree B. and Kute, Mahesh and Waghchaure, Aishwarya and Kulkarni, Amol A.} } @article {47388, title = {Easy and practical approach to access multifunctional cylcopentadiene- and cyclopentene-spirooxindoles via [3+2] annulation}, journal = {Organic \& Biomolecular Chemistry}, volume = {19}, year = {2021}, month = {MAY}, pages = {4338-4345}, type = {Article}, abstract = {

A highly regioselective [3 + 2] annulation of Morita-Baylis-Hillman (MBH) carbonates of isatin with aurone/thioaurone is developed. Spiroheterocycles such as spirooxindole cyclopentadiene and spirooxindole fused hydroxy cyclopentene derivatives are constructed in one pot by exploring the reactivity of Lewis bases. Combined experimental and density functional theory (DFT) calculations offered an insight into the reaction mechanism.

}, issn = {1477-0520}, doi = {10.1039/d1ob00514f, Early Access Date = APR 2021}, author = {Warghude, Prakash K. and Sabale, Abhijeet S. and Dixit, Ruchi and Vanka, Kumar and Bhat, Ramakrishna G.} } @article {47417, title = {Efficient metal-free organic room temperature phosphors}, journal = {Chemical Science}, volume = {12}, year = {2021}, month = {MAR}, pages = {4216-4236}, type = {Review}, abstract = {

An innovative transformation of organic luminescent materials in recent years has realised the exciting research area of ultralong room-temperature phosphorescence. Here the credit for the advancements goes to the rational design of new organic phosphors. The continuous effort in the area has yielded wide varieties of metal-free organic systems capable of extending the lifetime to several seconds under ambient conditions with high quantum yield and attractive afterglow properties. The various strategies adopted in the past decade to manipulate the fate of triplet excitons suggest a bright future for this class of materials. To analyze the underlying processes in detail, we have chosen high performing organic triplet emitters that utilized the best possible ways to achieve a lifetime above one second along with impressive quantum yield and afterglow properties. Such a case study describing different classes of metal-free organic phosphors and strategies adopted for the efficient management of triplet excitons will stimulate the development of better candidates for futuristic applications. This Perspective discusses the phosphorescence features of single- and multi-component crystalline assemblies, host-guest assemblies, polymers, and polymer-based systems under various classes of molecules. The various applications of the organic phosphors, along with future perspectives, are also highlighted.

}, issn = {2041-6520}, doi = {10.1039/d1sc00446h}, author = {Nidhankar, Aakash D. and Goudappagouda and Wakchaure, Vivek C. and Babu, Sukumaran Santhosh} } @article {47501, title = {Excimer to exciplex transition through realization of donor-acceptor interactions in luminescent solvent-free liquids}, journal = {Nanoscale}, volume = {13}, year = {2021}, month = {JUN}, pages = {10780-10784}, type = {Article}, abstract = {Luminescent solvent-free organic liquids are known for their enhanced quantum yield, color tunability, and availability of a matrix for other dopants to generate hybrid luminescent materials with improved features for newer applications. Herein, we report a donor-acceptor based luminescent {\textquoteleft}{\textquoteleft}exciplex liquid{\textquoteright}{\textquoteright} by utilizing the slightly different electron affinity of the acceptor molecules. A red-shifted broad exciplex emission exhibited by the donor-acceptor pair even at a lower concentration of the acceptor (0.001 equiv.) indicates high efficiency in the solvent-free state. A detailed NMR study revealed weak intermolecular interactions between the donor and acceptor in the solvent-free matrix that stabilizes the exciplex liquid. The failure of structurally similar solid counterparts to form an exciplex confirms the advantage of the available supportive liquid matrix. Besides, the luminescent exciplex liquid is found efficient in sensing application, which is unachievable by either the individual liquids or their solid counterparts. Here, a transition of a donor-acceptor pair from a solid to solvent-free liquid results in a new hybrid liquid that can be an alternative for solid sensor materials.}, issn = {2040-3364}, doi = {10.1039/d1nr02190g, Early Access Date = MAY 2021}, author = {Wakchaure, Vivek Chandrakant and Goudappagouda and Das, Tamal and Ravindranathan, Sapna and Babu, Sukumaran Santhosh} } @article {47077, title = {Green synthesis of methoxy-poly(ethylene glycol)-block-poly(l-lactide-co-glycolide) copolymer using zinc proline as a biocompatible initiator for irinotecan delivery to colon cancer in vivo}, journal = {Biomaterials Science}, volume = {9}, year = {2021}, month = {FEB}, pages = {795-806}, type = {Article}, abstract = {

Poly(lactic-co-glycolic acid) (PLGA) is the most commonly described biocompatible copolymer used in biomedical applications. In this work, a green synthetic approach based on the biocompatible zinc proline complex, as an initiator for PLGA synthesis, is reported for the first time for the synthesis of methoxy-poly(ethylene glycol)-block-poly(l-lactic-co-glycolic acid) (mPEG-PLGA). mPEG-PLGA with controlled molecular weight and narrow polydispersity was synthesised. Its potential for delivery of irinotecan (Ir), a poorly water-soluble chemotherapeutic drug used for the treatment of colon and pancreatic cancer, was studied. Nanoparticles of controlled size (140-160 nm), surface charge (similar to-10 mV), release properties and cytotoxicity against CT-26 (colon) and BxPC-3 (pancreatic) cancer cells, were prepared. Tumor accumulation was confirmed by optical imaging of fluorescently labelled nanoparticles. Unlike Tween (R) 80 coated NP-Ir, the Pluronic (R) F-127 coated NP-Ir exhibits significant tumor growth delay compared to untreated and blank formulation treated groups in the CT-26 subcutaneous tumor model, after 4 treatments of 30 mg irinotecan per kg dose. Overall, this proof-of-concept study demonstrates that the newly synthesized copolymer, via a green route, is proven to be nontoxic, requires fewer purification steps and has potential applications in drug delivery.

}, issn = {2047-4830}, doi = {10.1039/d0bm01421d}, author = {Giram, Prabhanjan S. and Wang, Julie Tzu-Wen and Walters, Adam A. and Rade, Priyanka P. and Akhtar, Muhammad and Han, Shunping and Faruqu, Farid N. and Abdel-Bar, Hend M. and Garnaik, Baijayantimala and Al-Jamal, Khuloud T.} } @article {47335, title = {Highly efficient and extremely simple protocol for the oxidation α-hydroxyphosphonates to α-ketophosphonates using Dess-Martin periodinane}, journal = {ARKIVOC}, volume = {4}, year = {2021}, month = {JAN}, type = {Article}, doi = {10.24820/ark.5550190.p011.213}, author = {Kupwade, Ravindra and Mitragotri, Satish D. and Kulkarni, Makarand A. and Desai, Uday V. and Wadagaonkar, Prakash P.} } @article {47665, title = {High-voltage non-aqueous hybrid supercapacitor based on the N2200 polymer supported over multiwalled carbon nanotubes}, journal = {Nanoscale}, volume = {13}, year = {2021}, month = {JUL}, pages = {12314-12326}, type = {Article}, abstract = {P(NDI2OD-T2), also known as Polyera ActivInk N2200, is a widely accepted non-fullerene acceptor polymer that is used prominently in the energy harvesting application due to its ease of synthesis, high electron mobility, and other desirable semiconducting properties. With its recent foray into energy storage applications, there is tremendous potential for developing composites of N2200 with carbon nanotubes (CNTs) to improve its electrical properties and extend its applicability. Here we report a facile synthesis of an N2200 composite with multiwalled carbon nanotubes (MWCNTs) following an in situ approach to include MWCNTs into the polymer matrix, improving its electrochemical performance in an organic electrolyte (1 M LiClO4/propylene carbonate). The composite material with an optimum MWCNT content exhibits prominent redox behavior delivering a specific capacity of 80 mA h g((polymer))(-1) in a standard three-electrode cell. Moreover, the N2200/MWCNT composite material showing a battery-type electrochemical signature could perform as an efficient negative electrode in a high-voltage (2.4 V) hybrid supercapacitor device comprising capacitive activated carbon as the positive electrode.}, issn = {2040-3364}, doi = {10.1039/d1nr01422f}, author = {Wavhal, Bhaiyyasaheb Anurath and Ghosh, Meena and Sharma, Sandeep and Kurungot, Sreekumar and Asha, S. K.} } @article {47437, title = {Ice-colloidal templated carbon host for highly efficient, dendrite free Li metal anode}, journal = {Carbon}, volume = {179}, year = {2021}, month = {JUL}, pages = {256-265}, type = {Article}, abstract = {

With its high theoretical specific capacity value, lithium metal itself would be an ideal anode material for rechargeable Li-ion batteries (LIBs). However, practical application of lithium metal is obstructed due to lithium dendrite growth during cycling leads to unstable SEI formation, volume fluctuation and safety hazard. Herein, we have developed a novel high surface area carbon network with both meso (\~{}20 nm) and micron (\~{}1{\textendash}2 μm) size porosity, via ice-colloidal templating, as a scaffold for stable lithium metal anode mitigating lithium dendrite formation. The 3D porous nitrogen doped carbon (3D PNC) network is capable of lithium deposition equivalent to 10 mAhcm-2 at 2 mAcm-2 current density with 99.96\% coulombic efficiency for 100 cycles. Moreover, 3D PNC when subjected to 3000 h of continuous plating-stripping measurements (\~{}700 cycles) depicts the coulombic efficiency of 99.84\% with no observable dendrite growth at the current density of 2 mAcm-2 and lithium intake capacity of 5 mAhcm-2. A full cell of lithium plated 3D PNC anode with LiFePO4 shows an excellently stable performance up to 50 cycles at an input current density of 50 mAg-1, with a coulombic efficiency retention of 99.73\%.

}, doi = {10.1016/j.carbon.2021.04.021}, author = {Patrike, Apurva and Kaniyamparambil, Karthika and Wahid, Malik and Chaturvedi, Vikash and Shelke, Manjusha} } @article {47806, title = {Identification of a novel series of potent organosilicon mosquito repellents}, journal = {ACS Omega}, volume = {6}, year = {2021}, month = {NOV}, pages = {31236-31243}, type = {Article}, abstract = {Mosquito control by personal protection is one of the most efficient ways of curtailing deadly diseases such as malaria and dengue with the potential to save millions of lives per year. DEET (N,N-diethyl-3-methyl benzamide) is currently considered as the gold standard for mosquito repellents, being used for the past several decades. Control by DEET, however, is being threatened by emerging resistance among mosquitoes. To address this concern and also to improve protection times, we synthesized a novel series of 25 silicon-containing acyl piperidines using acid{\textendash}amine coupling protocol and tested their activity against Aedes aegypti in mosquito-repellent assays. Several compounds from this series appear to possess good mosquito-repellent properties. Most notably, at 0.5 mg/cm2 concentrations, the mean protection time for NDS100100 was 756 min, which was higher than that of DEET (616 min). The details of design, synthesis, and biological evaluation are discussed herein.}, doi = {10.1021/acsomega.1c04961}, author = {Kulkarni, Akshay S. and Ramesh, Remya and Walia, Safal and Sayyad, Shahebaz I. and Gathalkar, Ganesh B. and Balamkundu, Seetharamsing and Joshi, Manali and Sen, Avalokiteswar and Reddy, D. Srinivasa} } @article {47432, title = {In situ polymerization process: an essential design tool for lithium polymer batteries dagger}, journal = {Energy \& Environmental Science}, volume = {14}, year = {2021}, month = {MAY }, pages = {2708-2788}, type = {Review}, abstract = {

Polymer electrolytes (PEs), a type of solid-state electrolytes (SSEs), have been in contention for nearly half a century to replace organic liquid electrolytes (LEs) that are used in state-of-the-art lithium-ion batteries (LIBs). They are envisaged to accelerate the industrial-scale production of safe, energy-dense, flexible, and thin lithium polymer batteries (LPBs). LPBs are expected to be widely employed for electric propulsion and other futuristic applications, such as flexible electronics and the Internet of Things (IoT). Even though several polymer architectures and chemistries have been attempted so far, PEs that can outperform LEs remain a real challenge. Apart from inadequate Li+-ion transport properties, challenges concerning the integration of PEs and the engineering of compatible, robust, and durable interfaces and interphases at both the electrodes of LPBs must be appropriately addressed. Recently, the in situ polymerization process has been widely employed as a robust fabrication tool for surpassing the intricacies related to the integration of PEs in LPBs. Hence, in this review, we focus on the in situ polymerization processes that employ various polymerization methods (e.g., free-radical polymerization, ionic polymerization, electropolymerization, condensation polymerization, etc.), functional monomers and oligomers (e.g., acrylate, methacrylate, allyl and vinyl ethers, epoxides, etc.), and PE integration strategies for the fabrication of lithium (ion and metal) polymer batteries (LIPBs and LMPBs). Additionally, this review also evaluates the approaches that have been developed until now to implement the in situ processing of LPBs from large-sized pouch cells to flexible-/printable-batteries and even microbatteries.

}, issn = {1754-5692}, doi = {10.1039/d0ee03527k, Early Access Date = FEB 2021}, author = {Vijayakumar, Vidyanand and Anothumakkool, Bihag and Kurungot, Sreekumar and Winter, Martin and Nair, Jijeesh Ravi} } @article {47390, title = {Insights from a pan India Sero-epidemiological survey (Phenome-India Cohort) for SARS-CoV2}, journal = {eLife}, volume = {10}, year = {2021}, month = {APR }, pages = {e66537}, type = {Article}, abstract = {

To understand the spread of SARS-CoV2, in August and September 2020, the Council of Scientific and Industrial Research (India) conducted a serosurvey across its constituent laboratories and centers across India. Of 10,427 volunteers, 1058 (10.14\%) tested positive for SARS-CoV2 anti-nucleocapsid (anti-NC) antibodies, 95\% of which had surrogate neutralization activity. Three-fourth of these recalled no symptoms. Repeat serology tests at 3 (n = 607) and 6 (n = 175) months showed stable anti-NC antibodies but declining neutralization activity. Local seropositivity was higher in densely populated cities and was inversely correlated with a 30-day change in regional test positivity rates (TPRs). Regional seropositivity above 10\% was associated with declining TPR. Personal factors associated with higher odds of seropositivity were high-exposure work (odds ratio, 95\% confidence interval, p value: 2.23, 1.92-2.59, \<0.0001), use of public transport (1.79, 1.43-2.24, \<0.0001), not smoking (1.52, 1.16-1.99, 0.0257), non-vegetarian diet (1.67, 1.41-1.99, \<0.0001), and B blood group (1.36, 1.15-1.61, 0.001).

}, issn = {2050-084X}, doi = {10.7554/eLife.66537}, author = {Naushin, Salwa and Sardana, Viren and Ujjainiya, Rajat and Bhatheja, Nitin and Kutum, Rintu and Bhaskar, Akash Kumar and Pradhan, Shalini and Prakash, Satyartha and Khan, Raju and Rawat, Birendra Singh and Tallapaka, Karthik Bharadwaj and Anumalla, Mahesh and Chandak, Giriraj Ratan and Lahiri, Amit and Kar, Susanta and Mulay, Shrikant Ramesh and Mugale, Madhav Nilakanth and Srivastava, Mrigank and Khan, Shaziya and Srivastava, Anjali and Tomar, Bhawana and Veerapandian, Murugan and Venkatachalam, Ganesh and Vijayakumar, Selvamani Raja and Agarwal, Ajay and Gupta, Dinesh and Halami, Prakash M. and Peddha, Muthukumar Serva and Sundaram, Gopinath M. and Veeranna, Ravindra P. and Pal, Anirban and Agarwal, Vinay Kumar and Maurya, Anil Ku and Singh, Ranvijay Kumar and Raman, Ashok Kumar and Anandasadagopan, Suresh Kumar and Karuppanan, Parimala and Venkatesan, Subramanian and Sardana, Harish Kumar and Kothari, Anamika and Jain, Rishabh and Thakur, Anupama and Parihar, Devendra Singh and Saifi, Anas and Kaur, Jasleen and Kumar, Virendra and Mishra, Avinash and Gogeri, Iranna and Rayasam, Geethavani and Singh, Praveen and Chakraborty, Rahul and Chaturvedi, Gaura and Karunakar, Pinreddy and Yadav, Rohit and Singhmar, Sunanda and Singh, Dayanidhi and Sarkar, Sharmistha and Bhattacharya, Purbasha and Acharya, Sundaram and Singh, Vandana and Verma, Shweta and Soni, Drishti and Seth, Surabhi and Vashisht, Sakshi and Thakran, Sarita and Fatima, Firdaus and Singh, Akash Pratap and Sharma, Akanksha and Sharma, Babita and Subramanian, Manikandan and Padwad, Yogendra S. and Hallan, Vipin and Patial, Vikram and Singh, Damanpreet and Tripude, Narendra Vijay and Chakrabarti, Partha and Maity, Sujay Krishna and Ganguly, Dipyaman and Sarkar, Jit and Ramakrishna, Sistla and Kumar, Balthu Narender and Kumar, Kiran A. and Gandhi, Sumit G. and Jamwal, Piyush Singh and Chouhan, Rekha and Jamwal, Vijay Lakshmi and Kapoor, Nitika and Ghosh, Debashish and Thakkar, Ghanshyam and Subudhi, Umakanta and Sen, Pradip and Chaudhury, Saumya Ray and Kumar, Rashmi and Gupta, Pawan and Tuli, Amit and Sharma, Deepak and Ringe, Rajesh P. and Amarnarayan, D. and Kulkarni, Mahesh and Shanmugam, Dhansekaran and Dharne, Mahesh S. and Dastager, Sayed G. and Joshi, Rakesh and Patil, Amita P. and Mahajan, Sachin N. and Khan, Abujunaid Habib and Wagh, Vasudev and Yadav, Rakesh Kumar and Khilari, Ajinkya and Bhadange, Mayuri and Chaurasiya, Arvindkumar H. and Kulsange, Shabda E. and Khairnar, Krishna and Paranjape, Shilpa and Kalita, Jatin and Sastry, Narahari G. and Phukan, Tridip and Manna, Prasenjit and Romi, Wahengbam and Bharali, Pankaj and Ozah, Dibyajyoti and Sahu, Ravi Kumar and Babu, Elapavalooru Vssk and Sukumaran, Rajeev and Nair, Aiswarya R. and Valappil, Prajeesh Kooloth and Puthiyamadam, Anoop and Velayudhanpillai, Adarsh and Chodankar, Kalpana and Damare, Samir and Madhavi, Yennapu and Aggarwal, Ved Varun and Dahiya, Sumit and Agrawal, Anurag and Dash, Debasis and Sengupta, Shantanu} } @article {47095, title = {Molecular investigation of glycated insulin-induced insulin resistance via insulin signaling and AGE-RAGE axis}, journal = {Biochimica ET Biophysica Acta-Molecular Basis of Disease}, volume = {1867}, year = {2021}, month = {FEB }, pages = {166029}, type = {Article}, abstract = {

Hyperglycemic condition in diabetes promotes glycation of various plasma proteins including insulin. Glycation of insulin has been reported to reduce its biological activity. Reduced biological activity of glycated insulin could be either due to reduced affinity for the insulin receptor and impaired insulin signaling, or it can act as a ligand for the receptor for advanced glycation end products (RAGE) and activates oxidative stress and pro-inflammatory pathways leading to insulin resistance. This study investigates the effect of glycated insulin on both insulin and RAGE signaling. Glycated insulin treatment to Chinese hamster ovary (CHO-IR-GLUT4) cells stably expressing insulin receptor (IR) and glucose transporter fused with a green fluorescent protein (GLUT4-GFP) resulted in the impairment of insulin signaling, as the phosphorylation of IR and AKT significantly reduced, which affected GLUT4 translocation and glucose uptake. Moreover, it also activated RAGE signaling as observed by increased expression of NADPH oxidase accompanied by an increase in reactive oxygen species (ROS). Immunofluorescence study indicated the translocation of NF-kappa B to the nucleus upon treatment of glycated insulin. This was associated with increased RAGE expression, Caspase 3, and cell death. Downregulation of RAGE with the losartan treatment restored the impaired insulin signaling and glucose uptake. Additionally, in silico study demonstrated that glycated insulin has reduced binding affinity to insulin receptor and increased binding affinity to RAGE. Overall, this study demonstrates the role of glycated insulin in exacerbating insulin resistance by impairing insulin signaling as well as stimulating AGE-RAGE signaling.

}, keywords = {AGE, Diabetes, Glycation, Hyperglycemia, insulin, RAGE}, issn = {0925-4439}, doi = {10.1016/j.bbadis.2020.166029}, author = {Walke, Prachi B. and Bansode, Sneha B. and More, Nikita P. and Chaurasiya, Arvindkumar H. and Joshi, Rakesh S. and Kulkarni, Mahesh J.} } @article {47446, title = {Nanoparticles of biotite mica as Krishna Vajra Abhraka Bhasma: synthesis and characterization}, journal = {Journal of Ayurveda and Integrative Medicine }, volume = {12}, year = {2021}, month = {JUN }, pages = {269-282}, type = {Article}, abstract = {

Background

Bio-inorganic\ nanoparticles\ or\ metal nanoparticles\ are used in medicine for diagnostic and treatment purposes. The\ nanomedicines\ from traditional Ayurvedic system are termed as bhasma. Rasashastra, the branch of inorganic medicines of\ Ayurveda, has documented monographs of metal-mineral bhasmas as potent drugs. However there is lack of scientific analytical data of the end products.

Objectives

Present study was aimed at finding out the morphological, structural, elemental and chemical composition of the Krishna vajra abhraka bhasma (KVB).

Materials and methods

Bhasma of KVB (Biotite Mica) was prepared in our laboratory using biotite mica sheets befitting selection criteria and carrying out further processes with strict SOPs as per AFI.

Results

The bhasma complied with the confirmatory tests from Rasashastra. The physical and physicochemical tests correlate with the results obtained by instrumental analytical methods. SEM revealed square shaped nanoparticles of mean size of 92.3 nm. EDAX showed presence of Si, Mg, O, Fe, Ca, Na, C, K and Al. XRD revealed the crystalline nature of bhasma with mixture of various individual oxides and spinel shape of the crystal. DLS showed that the nanoparticles are unimodal in nature. FTIR and NMR showed the organic functional groups obtained from cow milk and selected herbs, indicating unique bio-inorganic nature of the KVB.

}, doi = {10.1016/j.jaim.2020.09.004}, author = {Wele, Asmita and Sourav, De and Dalvi, Madhuri and Devi, Nandini and Pandit, Vijaya} } @article {47068, title = {Operando generated ordered heterogeneous catalyst for the selective conversion of CO2 to methanol}, journal = {ACS Energy Letters}, volume = {6}, year = {2021}, month = {FEB }, pages = {509-516}, type = {Article}, abstract = {

The discovery of new materials for efficient transformation of carbon dioxide (CO2) into desired fuel can revolutionize large-scale renewable energy storage and mitigate environmental damage due to carbon emissions. In this work, we discovered an operando generated stable Ni-In kinetic phase that selectively converts CO2 to methanol (CTM) at low pressure compared to the state-of-the-art materials. The catalytic nature of a well-known methanation catalyst, nickel, has been tuned with the introduction of inactive indium, which enhances the CTM process. The remarkable change in the mechanistic pathways toward methanol production has been mapped by operando diffuse reflectance infrared Fourier transform spectroscopy analysis, corroborated by first-principles calculations. The ordered arrangement and pronounced electronegativity difference between metals are attributed to the complete shift in mechanism. The approach and findings of this work provide a unique advance toward the next-generation catalyst discovery for going beyond the state-of-the-art in CO2 reduction technologies.

}, issn = {2380-8195}, doi = {10.1021/acsenergylett.0c02614}, author = {Cherevotan, Arjun and Raj, Jithu and Dheer, Lakshay and Roy, Soumyabrata and Sarkar, Shreya and Das, Risov and Vinod, Chathakudath P. and Xu, Shaojun and Wells, Peter and Waghmare, V, Umesh and Peter, Sebastian C.} } @article {46700, title = {Oxime ligands for Pd catalysis of the mizoroki-heck reaction, suzuki-miyaura coupling \& annulation reactions}, journal = {Synthetic Communications}, volume = {51}, year = {2021}, month = {JAN }, pages = {308-316}, type = {Article}, abstract = {

Monodentate and bidentate chelating oximes are readily available ligands for the Pd catalysis of the Mizoroki-Heck reaction and the Suzuki coupling. High yields were obtained in the Suzuki coupling in aqueous dioxane with TBABr as additive. The oximes can be easily synthesized from the corresponding ketones or aldehydes and thus provide a very large number of nitrogen-based ligands. They have the advantage of not undergoing oxidative degradation, common for phosphine ligands. Chelating oximes with Pd(OAc)(2), activate aryl iodides to give high yields of the substitution products in the Mizoroki-Heck reactions as well as the Suzuki coupling. Acetophenone oxime ligand with Pd(OAc)(2), catalyzed the reaction of aryl iodides with 1,2-disubstituted alkenes in moderate to high yields. As a test example, the LaRock indole annulation and synthesis of isocoumarin were achieved with acetophenone oxime ligand and Pd(OAc)(2)in high yields.

}, keywords = {Isocoumarin, LaRock annulation, Mizoroki-Heck reaction, oximes, Suzuki coupling}, issn = {0039-7911}, doi = {10.1080/00397911.2020.1826969, Early Access Date = SEP 2020}, author = {Bangar, Pronnoy G. and Nahide, Pradip D. and Meroliya, Heena K. and Waghmode, Shobha A. and Iyer, Suresh} } @article {47816, title = {Oxime ligands for Pd catalysis of the mizoroki{\textendash}heck reaction, Suzuki{\textendash}Miyaura coupling \& annulation reactions}, journal = {Synthetic Communications}, volume = {51}, year = {2021}, month = {JAN}, pages = {308-316}, type = {Article}, abstract = {AbstractMonodentate and bidentate chelating oximes are readily available ligands for the Pd catalysis of the Mizoroki{\textendash}Heck reaction and the Suzuki coupling. High yields were obtained in the Suzuki coupling in aqueous dioxane with TBABr as additive. The oximes can be easily synthesized from the corresponding ketones or aldehydes and thus provide a very large number of nitrogen-based ligands. They have the advantage of not undergoing oxidative degradation, common for phosphine ligands. Chelating oximes with Pd(OAc)2, activate aryl iodides to give high yields of the substitution products in the Mizoroki{\textendash}Heck reactions as well as the Suzuki coupling. Acetophenone oxime ligand with Pd(OAc)2, catalyzed the reaction of aryl iodides with 1,2-disubstituted alkenes in moderate to high yields. As a test example, the LaRock indole annulation and synthesis of isocoumarin were achieved with acetophenone oxime ligand and Pd(OAc)2 in high yields.}, doi = {10.1080/00397911.2020.1826969}, author = {Bangar, Pronnoy G. and Nahide, Pradip D. and Meroliya, Heena K. and Waghmode, Shobha A. and Iyer, Suresh} } @article {46596, title = {Partially bio-based furyl-functionalized organosoluble poly(ether ether ketone)s}, journal = {Polymer International}, volume = {70}, year = {2021}, month = {AUG}, type = {Article}, abstract = {

A new series of partially bio-based (co)poly(ether ether ketone)s bearing pendent furyl groups was synthesized by nucleophilic aromatic substitution polycondensation of varying molar proportions of 4,4 {\textquoteleft}-(furan-2-ylmethylene)bis(2-methoxyphenol) and bisphenol-A with 4,4 {\textquoteleft}-difluorobenzophenone. The chemical structures, compositions and random nature of (co)poly(ether ether ketone)s were confirmed by NMR spectroscopy. Inherent viscosities and number-average molecular weights of the (co)poly(ether ether ketone)s were in the range 0.74-2.90 dL g(-1) and 33 500-46 300 g mol(-1), respectively, indicating the formation of reasonably high molecular weight polymers. (Co)poly(ether ether ketone)s were readily soluble in common organic solvents and could be cast into tough, transparent and flexible films from chloroform solutions. (Co)poly(ether ether ketone)s exhibited 10\% weight loss and glass transition temperatures in the range 429-464 and 152-156 degrees C, respectively. A representative copoly(ether ether ketone) was crosslinked with 1,1 {\textquoteleft}-(methylenedi-1,4-phenylene)bismaleimide via Diels-Alder reaction to form a crosslinked polymer which showed improved mechanical properties and was recycled twice without significant loss of mechanical properties. Diels-Alder/retro Diels-Alder reaction was demonstrated by studies of sol-gel transformation, solubility tests, DSC and stress-strain measurements. (c) 2020 Society of Chemical Industry

}, keywords = {aromatic poly(ether ether ketone)s, bio-based, crosslinking, Diels-Alder reaction, pendent furyl groups}, issn = {0959-8103}, doi = {10.1002/pi.6160}, author = {Kuhire, Sachin S. and Talanikar, Aniket A. and Tawade, V, Bhausaheb and Nagane, Samadhan S. and Wadgaonkar, Prakash P.} } @article {47428, title = {Partially bio-based triarylamine-containing polyimides: synthesis, characterization and evaluation in non-volatile memory device applications}, journal = {European Polymer Journal}, volume = {147}, year = {2021}, month = {MAR }, pages = {110327}, type = {Article}, abstract = {

A new triarylamine-containing diamine, viz. 4, 4{\textquoteright}-diamino-4 {\textquoteleft}{\textquoteright} pentadecyltriphenylamine was synthesised starting from cashew nut shell liquid (CNSL) - a non-edible by-product of cashew processing industry. Three new partially bio-based triarylamine-containing polyimides were synthesised by one-step high temperature solution poly-condensation of 4, 4{\textquoteright}-diamino-4 {\textquoteleft}{\textquoteright} pentadecyltriphenylamine with aromatic dianhydrides, namely, 3,3{\textquoteright},4,4{\textquoteright}-biphenyltetracarboxylic dianhydride (BPDA), 4,4{\textquoteright}-oxydiphthalic anhydride (ODPA) and 4,4{\textquoteright}-(hexa-fluoroisopropylidene) diphthalic anhydride (6-FDA). Polyimides were determined to be of reasonably high molecular weights as inherent viscosity and number average molecular weights (M-n, Polystyrene standard) values were in the range 0.54-0.60 dL g(-1) and 26,800-43,500 g mol(-1), respectively. Polyimides exhibited excellent solubility in common organic solvents and film-forming nature along with reasonably good thermal properties as indicated by temperature for 10\% weight loss (T-10) and glass transition temperatures (T-g) which were in the range 418-447 and 165-225 degrees C, respectively. The optical and electrochemical band-gap values were in the range of 1.95-1.98 eV and 1.671-1.745 eV, respectively. Among triarylamine-containing polyimide devices, BPDA-based device showed acceptable current-voltage and non-volatile memory properties such as the endurance of 500 cycles and 1000 s of retention time. The conduction mechanism developed in the memory devices was also explored and was found to follow Ohmic and Schottky conduction mechanisms.

}, keywords = {Bio-based polyimides, CNSL, Memory device, pentadecyl, Triarylamine}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2021.110327}, author = {Chatterjee, Deepshikha and Jadhav, Uday A. and Javaregowda, Bharathkumar H. and Dongale, Tukaram D. and Patil, Pramod S. and Wadgaonkar, Prakash P.} } @article {47606, title = {Priestia veravalensis sp. nov., isolated from coastal sample}, journal = {Archives of Microbiology}, volume = {203}, year = {2021}, month = {OCT}, pages = {4839-4845}, type = {Article}, abstract = {The taxonomic position of two isolates, SGD-V-76(T) and SGD-M-37, isolated from sediment sample of Veraval coast, India, was examined using the polyphasic taxonomic approach. The morphological and chemotaxonomic characteristics of these two organisms are typical of the genus Priestia. The phylogenetic analyses performed using almost complete 16S rRNA gene sequences demonstrated that the isolate belongs to the Bacillaceae family, and forms a clade within the cluster containing Priestia flexus MTCC 2909(T), Priestia aryabhattai B8W22(T) and Priestia megaterium KCTC 3007(T) and both strains showed highest similarity of > 98\% with 3-29 nucleotide differences. The cell wall contained meso-diaminopimelic acid as the diagnostic diamino acid. The predominant isoprenoid quinone was MK-7 and the G + C content of strains was 37.5-37.7 mol\%. However, the DNA-DNA hybridization and the phenotypic characteristics revealed that, the strain SGD-V-76(T) and strain SGD-M-37 are similar species but different from any known Priestia species with ANI values of 79.2, 79.3 and 79.2 and the dDDH values of 17.7, 17.8 and 18.0\% respectively. On the basis of phenotypic characteristics, phylogenetic analysis and the results of biochemical and physiological tests, and genomic data strain SGD-V-76(T) was clearly distinguished from closely related members of the Priestia genus. Based on the above data analysis strain SGD-V-76(T) (= DSM28242(T) = KCTC33802(T) = CIP111056(T) = NCIM5510(T)) represents a novel species of the genus Priestia, and we propose the name Priestia veravalensis sp. nov.}, keywords = {Coastal sediment, genome, Priestia, Veraval}, issn = {0302-8933}, doi = {10.1007/s00203-021-02418-z}, author = {Wagh, Vasudev S. and Ram, Hari and Dastager, Syed G.} } @article {47360, title = {Process-induced microstructure in viscose and lyocell regenerated cellulose fibers revealed by SAXS and SEM of acid-etched samples}, journal = {ACS Applied Polymer Materials}, volume = {3}, year = {2021}, month = {MAY }, pages = {2598-2607}, type = {Article}, abstract = {

Regenerated cellulose fibers represent an important class of bioderived commercial fibers. The traditional viscose process requires the use of environmentally harmful carbon disulfide solvent to produce fibers. Lyocell fibers, produced using a more sustainable recent process, exhibit differences in properties from viscose. These differences arise from their semicrystalline microstructure, formed during fiber spinning. It is widely believed that regenerated cellulose fibers predominantly form fringed fibrillar crystals. We optimize acid etching, followed by SEM as an experimental tool to visualize this fibrillar structure. Acid etching provides sufficient topological contrast to directly visualize similar to O(10 nm) fibrils using field-emission scanning electron microscopy (SEM). We combine SEM with small-angle X-ray scattering (SAXS) to reveal other microstructural details. We observe a Bragg peak, indicating the coexistence of stacked lamellar structure with crystalline fibrils for viscose fibers, but not for lyocell. Viscose and lyocell fibers are characterized by partially oriented semicrystalline microstructure. We present a methodology to calculate the Lorentz correction for such microstructure and employ this to analyze the lamellar scattering from viscose fibers using a 1D correlation function approach. We characterize the lamellar microstructure after swelling viscose fibers with water and observe expansion of the Bragg spacing due to water absorption in the amorphous regions. Our data suggest that the water-induced plasticization of amorphous regions is inhomogeneous. Lamellar stacks that are more misoriented from the fiber direction exhibit lower swelling than those along the fiber direction. The experimental methods described in this work reveal interesting details of semicrystalline microstructure in regenerated cellulose fibers, with important implications for the mechanical response of dry and wet fibers. The methods developed here might find use in investigations of other polymer fibers as well.

}, keywords = {acid etching, crystalline lamellae, fibers, fibrils, Lorentz correction, Regenerated cellulose, SAXS}, issn = {2637-6105}, doi = {10.1021/acsapm.1c00204}, author = {Sharma, Aakash and Wankhede, Parnashri and Samant, Roopali and Nagarkar, Shailesh and Thakre, Shirish and Kumaraswamy, Guruswamy} } @article {47612, title = {Replacement of loop residues in TBA by an abasic ethylene glycol spacer: effect on stability, structure and function**}, journal = {ChemistrySelect}, volume = {6}, year = {2021}, month = {OCT }, pages = {10648-10650}, type = {Article}, abstract = {This article describes the synthesis of ethyleneglycol (E) phosphoramidite and its incorporation into the thrombin binding aptamer (TBA) sequence at loop positions. Circular dichroism (CD) study revealed no major disturbances in the secondary structure of TBA by the abasic E unit and the derived oligomers exhibited a typical antiparallel chair-like conformation similar to that of TBA. UV and CD spectroscopy, together with anti-coagulation and HPLC studies revealed that although nuclease stability was enhanced, and anti-coagulation reasonably good, the thermal stability of the quadruplexes was adversely affected.}, keywords = {aptamers, clotting time, ethylene glycol spacer, G-quadruplexes, nuclease stability}, issn = {2365-6549}, doi = {10.1002/slct.202102269}, author = {Wagh, Atish A. and Ghalawat, Monika and Fernandes, Moneesha} } @article {47416, title = {Reusable magnetic nanocatalyst for bio-fuel additives: the ultrasound-assisted synthesis of solketal dagger}, journal = {Sustainable Energy \& Fuels }, volume = {5}, year = {2021}, month = {APR}, pages = {2362-2372}, type = {Article}, abstract = {

Acetalization of glycerol into solketal, a potential fuel additive, is a promising approach to utilizing the large waste-stream of glycerol from the biodiesel industry. Herein, we report an efficient ultrasound-assisted room temperature synthesis of solketal by acetalization of glycerol with acetone using an easily recoverable sulfonic acid-functionalized, silica-coated Fe3O4 magnetic nanoparticle (Fe3O4@SiO2@SO3H MNP, FSS MNP) catalyst. The morphology, chemical composition and magnetic properties of the catalyst were elucidated. The acetalization of glycerol was carried out under ultrasonication at room temperature, resulting in 97\% glycerol conversion after 15 minutes and 95\% isolated yield of solketal with 100\% selectivity for this acetal. The facile magnetic retrievability of the catalyst imparted operational simplicity to the solketal synthetic protocol, avoiding complicated catalyst separation and product purification processes. The FSS catalyst was magnetically recycled for up to five catalytic experiments, maintaining a glycerol conversion of 95\% and without deterioration in its selectivity, composition, morphology or magnetic properties, thereby ameliorating the green aspects of the protocol.

}, issn = {2398-4902}, doi = {10.1039/d0se01900c, Early Access Date = MAR 2021}, author = {Rajkumari, Kalyani and Changmai, Bishwajit and Meher, Ananta Kumar and Vanlalveni, Chhangte and Sudarsanam, Putla and Wheatley, Andrew E. H. and Rokhum, Samuel Lalthazuala} } @article {47641, title = {Role of preparation parameters of Cu-Zn mixed oxide catalyst in solvent free glycerol carbonylation with urea}, journal = {Journal of the Indian Chemical Society}, volume = {98}, year = {2021}, month = {JUL}, pages = {100090}, type = {Article}, abstract = {Solvent-free carbonylation of glycerol with urea to glycerol carbonate (GC) was achieved over heterogeneous Cu-Zn mixed oxide catalyst. Cu-Zn catalysts with different ratios of Cu:Zn were prepared using co-precipitation (CP) and oxalate gel (OG) methods. As compared to CuO-ZnO(2:1) catalyst prepared by oxalate gel (OG) method, much higher conversion of glycerol and highest selectivity towards glycerol carbonate (GC) was achieved with CuO-ZnO_CP(2:1) catalyst. Physicochemical properties of prepared catalysts were investigated by using XRD, FT-IR, BET, TPD of CO2 and NH3 and TEM techniques. The effect of stoichiometric ratio of Cu/Zn, calcination temperature of CuO-ZnO catalysts and effect of reaction parameters such as molar ratio of substrates, time and temperature on glycerol conversion to GC were critically studied. Cu/Zn of 2:1 ratio, glycerol-urea 1:1 molar ratio, 145 degrees C reaction temperatures were found to be optimized reaction conditions to achieve highest glycerol conversion of 86\% and complete selectivity towards GC. The continuous expel of NH 3 from reaction the mixture avoided formation of ammonia complex with CuO-ZnO catalyst. As a result of this, CuO-ZnO catalyst could be recycled up to three times without losing its initial activity.}, keywords = {Co-precipitation (CP), Glycerol, Glycerol carbonate, Oxalate gel (OG)}, issn = {0019-4522}, doi = {10.1016/j.jics.2021.100090}, author = {Charate, Shrinivas and Shinde, Suhas and Kondawar, Sharda and Desai, Uday and Wadgaonkar, Prakash and Rode, Chandrashekhar} } @article {47703, title = {Room-temperature quasi-catalytic hydrogen generation from waste and water}, journal = {Green Chemistry}, volume = {23}, year = {2021}, month = {OCT}, pages = {7528-7533}, type = {Article}, abstract = {A solvation-driven catalyst-free H-2 generation system from water and various waste hydrosilanes at room temperature was developed, with good to quantitative H-2 yields in minutes. Using a green solvent is found to promote the strong coordination of proton carriers with hydrosilane to liberate H-2 based on molecular dynamics simulations. Theoretical calculations clarify that OH(-)in situ generated from H2O enabled by solvation is favorable for activating the Si-H species of hydrosilane, and the in situ formed Si-OH interacts more effectively with the adjacent remaining Si-H, both contributing to the overall enhanced H-2 generation. Moreover, the overall life-cycle impacts of the developed system are less than those of industrial H-2 production processes, especially in ozone layer depletion and abiotic depletion resources - fossil fuels. This protocol realizes the potential of efficiently producing H-2 from waste and water, and opens a new avenue to alleviate petroleum consumption.}, issn = {1463-9262}, doi = {10.1039/d1gc02722k}, author = {Wu, Hongguo and Zhang, Li-Long and Wang, Junqi and Jiang, Yiyuan and Li, Hu and Sudarsanam, Putla and Yang, Song} } @article {47091, title = {Sulfonic acid-functionalized heterogeneous catalytic materials for efficient biodiesel production: a review}, journal = {Journal of Environmental Chemical Engineering}, volume = {9}, year = {2021}, month = {FEB}, pages = {104719}, type = {Review}, abstract = {

The development of social productive forces leads to the increasing consumption of fossil fuels. However, the burning of traditional fossil fuels releases huge amounts of carbon emissions into the atmosphere, resulting in drastically increased global surface temperatures, and hence, global warming and abnormal climate change. Biodiesel, which can be produced by (trans)esterification of bio-oils using solid acid catalysts, is recognized as renewable and clean energy, alternative to fossil-derived diesel, and it can meet society{\textquoteright}s requirements. This review describes the catalytic conversion of bio-derived oils into biodiesel using various sulfonic acid-functionalized heterogeneous catalytic materials that show higher catalytic efficiency and superior recyclability. Besides, various methods of biodiesel preparation and the appropriate design and preparation of robust and efficient catalytic materials for biodiesel production were provided. Finally, the mechanisms of different catalytic esterification and transesterification reactions for biodiesel synthesis, the relevant reaction kinetic models, and techno-economic analysis of biodiesel production were critically discussed in this review.

}, keywords = {(Trans)esterification, Biodiesel, heterogeneous catalysis, kinetic study, solid acid}, doi = {10.1016/j.jece.2020.104719}, author = {Tan, Xiang and Sudarsanam, Putla and Tan, Jinyu and Wang, Anping and Zhang, Heng and Li, Hu and Yang, Song} } @article {47690, title = {Three in one: triple G-C-T base-coded brahma nucleobase amino acid: synthesis, peptide formation, and structural features}, journal = {Journal of Organic Chemistry}, volume = {86}, year = {2021}, month = {NOV }, pages = {15689-15694}, type = {Article}, abstract = {This note reports the synthesis and peptide formation of a novel triple G-C-T nucleobase amino acid (NBA) building block featuring three recognition faces: DDA (G mimic), DAA (C mimic), and ADA (T mimic). Readily obtainable in multigram scale in a remarkably easy one-step reaction, this unique NBA building block offers scope for wide ranging applications for nucleic acid recognition and nucleic acid peptide/protein interaction studies.}, issn = {0022-3263}, doi = {10.1021/acs.joc.1c01228}, author = {Wagh, Mahendra A. and Maity, Rahul and Bhosale, Rohit J. and Semwal, Divyam and Tothadi, Srinu and Vaidhyanathan, Ramanathan and Sanjayan, Gangadhar J.} } @article {47046, title = {Unbiased phenotype-based screen identifies therapeutic agents selective for metastatic prostate cancer}, journal = {Frontiers in Oncology}, volume = {10}, year = {2021}, month = {MAR }, pages = {594141}, type = {Article}, abstract = {

In American men, prostate cancer is the second leading cause of cancer-related death. Dissemination of prostate cancer cells to distant organs significantly worsens patients{\textquoteright} prognosis, and currently there are no effective treatment options that can cure advanced-stage prostate cancer. In an effort to identify compounds selective for metastatic prostate cancer cells over benign prostate cancer cells or normal prostate epithelial cells, we applied a phenotype-based in vitro drug screening method utilizing multiple prostate cancer cell lines to test 1,120 different compounds from a commercial drug library. Top drug candidates were then examined in multiple mouse xenograft models including subcutaneous tumor growth, experimental lung metastasis, and experimental bone metastasis assays. A subset of compounds including fenbendazole, fluspirilene, clofazimine, niclosamide, and suloctidil showed preferential cytotoxicity and apoptosis towards metastatic prostate cancer cells in vitro and in vivo. The bioavailability of the most discerning agents, especially fenbendazole and albendazole, was improved by formulating as micelles or nanoparticles. The enhanced forms of fenbendazole and albendazole significantly prolonged survival in mice bearing metastases, and albendazole-treated mice displayed significantly longer median survival times than paclitaxel-treated mice. Importantly, these drugs effectively targeted taxane-resistant tumors and bone metastases - two common clinical conditions in patients with aggressive prostate cancer. In summary, we find that metastatic prostate tumor cells differ from benign prostate tumor cells in their sensitivity to certain drug classes. Taken together, our results strongly suggest that albendazole, an anthelmintic medication, may represent a potential adjuvant or neoadjuvant to standard therapy in the treatment of disseminated prostate cancer.

}, keywords = {bone, carcinoma, drug-screen, Metastasis, Prostate}, issn = {2234-943X}, doi = {10.3389/fonc.2020.594141}, author = {Chung, Ivy and Zhou, Kun and Barrows, Courtney and Banyard, Jacqueline and Wilson, Arianne and Rummel, Nathan and Mizokami, Atsushi and Basu, Sudipta and Sengupta, Poulomi and Shaikh, Badaruddin and Sengupta, Shiladitya and Bielenberg, Diane R. and Zetter, Bruce R.} } @article {48228, title = {2-oxoglutarate-dependent dioxygenases drive expansion of steroidal alkaloid structural diversity in the genus Solanum}, journal = {New Phytologist}, volume = {234}, year = {2022}, month = {MAY}, pages = {1394-1410}, type = {Article}, abstract = {

Solanum steroidal glycoalkaloids (SGAs) are renowned defence metabolites exhibiting spectacular structural diversity. Genes and enzymes generating the SGA precursor pathway, SGA scaffold and glycosylated forms have been largely identified. Yet, the majority of downstream metabolic steps creating the vast repertoire of SGAs remain untapped. Here, we discovered that members of the 2-OXOGLUTARATE-DEPENDENT DIOXYGENASE (2-ODD) family play a prominent role in SGA metabolism, carrying out three distinct backbone-modifying oxidative steps in addition to the three formerly reported pathway reactions. The GLYCOALKALOID METABOLISM34 (GAME34) enzyme catalyses the conversion of core SGAs to habrochaitosides in wild tomato S. habrochaites. Cultivated tomato plants overexpressing GAME34 ectopically accumulate habrochaitosides. These habrochaitoside enriched plants extracts potently inhibit Puccinia spp. spore germination, a significant Solanaceae crops fungal pathogen. Another 2-ODD enzyme, GAME33, acts as a desaturase (via hydroxylation and E/F ring rearrangement) forming unique, yet unreported SGAs. Conversion of bitter alpha-tomatine to ripe fruit, nonbitter SGAs (e.g. esculeoside A) requires two hydroxylations; while the known GAME31 2-ODD enzyme catalyses hydroxytomatine formation, we find that GAME40 catalyses the penultimate step in the pathway and generates acetoxy-hydroxytomatine towards esculeosides accumulation. Our results highlight the significant contribution of 2-ODD enzymes to the remarkable structural diversity found in plant steroidal specialized metabolism.

}, keywords = {Solanum, specialized metabolism, steroidal glycoalkaloids (SGAs), structural diversity, Tomato}, issn = {0028-646X}, doi = {10.1111/nph.18064}, author = {Sonawane, Prashant D. and Jozawiak, Adam and Barbole, Ranjit and Panda, Sayantan and Abebie, Bekele and Kazachkova, Yana and Gharat, Sachin A. and Ramot, Ofir and Unger, Tamar and Wizler, Guy and Meir, Sagit and Rogachev, Ilana and Doron-Faigenboim, Adi and Petreikov, Marina and Schaffer, Arthur and Giri, Ashok P. and Scherf, Tali and Aharoni, Asaph} } @article {47795, title = {Cardol: Cashew nut shell liquid (CNSL) - derived starting material for the preparation of partially bio-based epoxy resins}, journal = {European Polymer Journal}, volume = {166}, year = {2022}, month = {MAR}, pages = {111029}, type = {Article}, abstract = {Cardol is one of the interesting constituents of cashew nut shell liquid (CNSL) - a by-product of cashew processing industry- and it amounts to 15{\textendash}20\% by weight in natural CNSL. Chemically, cardol is a 15-carbon chain-substituted resorcinol wherein the side chain predominately contains mixture of one, two and three double bonds. Cardol on reaction with epichlorohydrin in the presence of sodium hydroxide afforded diglycidyl ether of cardol (DGEC). DGEC is a viscous free-flowing liquid (bulk viscosity 70 cP at 25~{\textdegree}C) and thus offers advantages in terms of ease of processing. DGEC and various compositions of DGEC with commercially available diglycidyl ether of bisphenol A (DGEBA) were cured with two amine hardeners, namely, isophorone diamine (IPDA) and diethylene triamine (DETA). The effects of different ratios of amine/epoxy (nah/ne) on cure characteristics were studied. The epoxy thermosets were characterized by DSC, TGA, DMA and tensile testing. DSC analysis showed glass transition temperature (Tg) values in the range 63{\textendash}155~{\textdegree}C for IPDA-cured thermosets, while DETA-cured thermosets exhibited Tg values in the range 45{\textendash}145~{\textdegree}C. Td5\% values, determined by TG analysis of epoxy thermosets, were in the range 347{\textendash}359~{\textdegree}C indicating their reasonably good thermal stability. Dynamic mechanical analysis showed storage modulus (E{\textquoteright}) in the range 0.75{\textendash}2.54 GPa and 0.51{\textendash}2.24 GPa for IPDA-cured and DETA-cured thermosets, respectively. The E{\textquoteright} value of epoxy thermosets was found to decrease with increase in molar proportion of DGEC in the formulations with DGEBA while elongation at break was found to increase from 3.1\% to 9.7\% and 2.8\% to 5.1\% for IPDA- and DETA-cured systems, respectively. SEM images of cryogenically fractured surfaces of cured thermosets based on studied compositions of DGEBA and DGEC did not indicate any phase separation implying homogeneous mixing of both the epoxy resins.}, keywords = {bio-based, Cardol, cashew nut shell liquid (CNSL), Epoxy resins, Storage modulus}, issn = {0014-3057}, doi = {https://doi.org/10.1016/j.eurpolymj.2022.111029}, url = {https://www.sciencedirect.com/science/article/pii/S0014305722000337}, author = {Ketan Makwana and Amol B. Ichake and Vinayak Valodkar and G. Padmanaban and Manohar V. Badiger and Prakash P. Wadgaonkar} } @article {48122, title = {Co-Ni layered double hydroxide for the electrocatalytic oxidation of organic molecules: an approach to lowering the overall cell voltage for the water splitting process}, journal = {ACS Applied Materials \& Interfaces}, volume = {14}, year = {2022}, month = {APR}, pages = {16222-16232}, type = {Article}, abstract = {

Electrocatalytic oxidation of simple organic molecules oilers a promising strategy to combat the sluggish kinetics of the water oxidation reaction (WOR). The low potential requirement, inhibition of the crossover of gases, and formation of value-added products at the anode are benefits of the electrocatalytic oxidation of organic molecules. Herein, we developed cobalt-nickel-based layered double hydroxide (LDH) as a robust material for the electrocatalytic oxidation of alcohols and urea at the anode, replacing the WOR. A facile synthesis protocol to form LDHs with different ratios of Co and Ni is adapted. It demonstrates that the reactants could be efficiently oxidized to concomitant chemical products at the anode. The half-cell study shows an onset potential of 1.30 V for benzyl alcohol oxidation reaction (BAOR), 1.36 V for glycerol oxidation reaction (GOR), 1.33 V for ethanol oxidation reaction (EOR), and 1.32 V for urea oxidation reaction (UOR) compared with 1.53 V for WOR. Notably, the hybrid electrolyzer in a full-cell configuration significantly reduces the overall cell voltage at a 20 mA cm(-2) current density by similar to 15\% while coupling with the BAOR, EOR, and GOR and similar to 12\% with the UOR as the anodic half-cell reaction. Furthermore, the efficiency of hydrogen generation remains unhampered with the types of oxidation reactions (alcohols and urea) occurring at the anode. This work demonstrates the prospects of lowering the overall cell voltage in the case of a water electrolyzer by integrating the hydrogen evolution reaction with suitable organic molecule oxidation.

}, keywords = {electrocatalytic oxidation, energy conversion, imidazole mediated, Layered compounds, water splitting}, issn = {1944-8244}, doi = {10.1021/acsami.2c00982}, author = {Shilpa, Nagaraju and Pandikassala, Ajmal and Krishnaraj, Perayil and Walko, Priyanka S. and Devi, R. Nandini and Kurungot, Sreekumar} } @article {48069, title = {Direct (hetero)arylation (DHAP) polymerization of conjugated polymers - new A-B-A monomer design for P(NDI2OD-T2) \& the challenges of adopting DHAP for continuous flow processes}, journal = {Journal of Materials Chemistry C}, volume = {10}, year = {2022}, month = {SEP}, pages = {13025-13039}, type = {Article}, abstract = {

P(NDI2OD-T2), also known as Polyera ActivInk N2200, was synthesized by the atom-economic direct hetero arylation polymerization (DHAP) route using a newly designed A-B-A monomer. The new monomer design involved flanking naphthalene diimide with bithiophene units in the bay position, which was further polymerized with bay substituted 1,4-dibromo naphthalene diimide, to afford the same polymer structure as P(NDI2OD-T2). The new monomer design resulted in a very high molecular weight (M-n: 99.5 kDa, D-M: 2.8) defect-free polymer in a quantitative yield by the DHAP batch process using 1,2,4-trichlorobenzene (TCB) as the solvent. DFT studies revealed that the abstraction of the alpha-proton from the naphthalene diimide substituted 2,2 {\textquoteleft}-bithiophene was favorable by 2.6 kcal mol(-1) (Delta Delta G) as compared to that from 2,2 {\textquoteleft}-bithiophene. The reason for this improved C-H activation at the alpha position can be attributed to the presence of C-HMIDLINE HORIZONTAL ELLIPSIS pi stabilizing interactions in naphthalene diimide substituted 2,2 {\textquoteleft}-bithiophene, which strengthens upon the extended charge delocalization throughout the ring, thus stabilizing the conjugate base generated after the proton abstraction. Continuous flow polymerization was carried out by pumping the DHAP reaction mixture including the monomers, catalyst, and additive (pivalic acid) solubilized in degassed TCB through a pre-heated glass condenser packed with K2CO3 and Celite under aerobic conditions. Reproducible molecular weights of M-n: 29.5 kDa, D-M: 1.7 were obtained at much lower concentrations of reactant mixture compared to that for batch polymerization. This is the first report of the synthesis of P(NDI2OD-T2) by a Continuous Flow Process adopting the DHAP route to obtain a defect-free polymer with reasonable molecular weights. P(NDI2OD-T2) was also synthesized by Stille polymerization as a reference control sample to compare the thermal and charge carrier transport properties of the DHAP polymers. Organic field-effect (OFET) mobility measurements indicated mobility values in the order of 10(-3) cm(2) V-1 s(-1) for the DHAP batch polymer (using the novel monomer design). The P(NDI2OD-T2) synthesized by DHAP batch using the commonly used starting materials - bisbromo naphthalene diimide and bithiophene, exhibited OFET mobilities which were one order less, similar to 10(-4) cm(2) V-1 s(-1). This observation highlights the importance of structural design in the monomer to enhance reactivity and thereby the bulk properties using the DHAP route.

}, issn = {2050-7526}, doi = {10.1039/d2tc02514k}, author = {Kakde, Navnath R. and Bharathkumar, H. J. and Wavhal, Bhaiyyasaheb A. and Nikam, Arun and Patil, Suneha and Dash, Soumya Ranjan and Vanka, Kumar and Krishnamoorthy, K. and Kulkarni, Amol and Asha, S. K.} } @article {47761, title = {Donor-acceptor based solvent-free organic liquid hybrids with exciplex emission and room temperature phosphorescence}, journal = {Chemical Communications}, volume = {58}, year = {2022}, month = {FEB }, pages = {1998-2001}, type = {Article}, abstract = {Solvent-free organic liquids are well-known for their excellent luminescence features. Hence, the recent developments in this area have marked them as potential emitters with high quantum yield and enhanced processability. The support of an available liquid matrix enables doping to deliver hybrid liquids with intriguing luminescence features. In this direction, we report solvent-free liquid donor-acceptor pairs with exciplex emission and room temperature phosphorescence at very low acceptor loading. The underlying weak intermolecular interactions have been revealed by 2D NMR techniques and theoretical calculations. The formation of large-area thin films by exciplex and phosphorescent liquid hybrids will encourage the development of scalable lighting and display materials.}, issn = {1359-7345}, doi = {10.1039/d1cc07082g}, author = {Wakchaure, Vivek Chandrakant and Veer, Sairam D. and Nidhankar, Aakash D. and Goudappagouda and Nayak, Rashmi and Asokan, Kiran and Ravindranathan, Sapna and Babu, Sukumaran Santhosh} } @article {48190, title = {Enhanced field emission behaviour from ethylene glycol mediated synthesis of 2D hexagonal SnS2 disc with nanoparticle}, journal = {Materials Science and Engineering B-Advanced Functional Solid-State Materials}, volume = {284}, year = {2022}, month = {OCT}, pages = {115865}, type = {Article}, abstract = {

Herein, octahedron and stacked 2D hexagonal disc - like nanostructures of SnS2 were obtained by hydrothermal and ethylene glycol mediated hydrothermal methods, respectively. Attempt has been made to shade light on the plausible growth mechanism. Liquid phase exfoliation followed by centrifugation process leads to presence of tiny single crystalline SnS2 nanoparticles (similar to 5 nm) on the hexagonal discs over C substrate, characterized by preferred growth along {001} direction. The observed Raman shift and enhanced intensities of A(1g) and E-g modes infer charge interactions between the SnS2 disc and C substrate. Interestingly, the SnS2-C emitter exhibited superior field emission (FE) behaviour due to the unique morphology, excellent charge transfer, and reduced work function (similar to 4.1 eV). Here the extraction of large current density of similar to 1137 mu A/cm(2) at an applied field of 3.72 V/mu m, with good emission current stability. The present strategy is beneficial to design architectured morphology for multi-functionality.

}, keywords = {2D layered materials, Field Emission (FE), SnS2, SnS2 on C}, issn = {0921-5107}, doi = {10.1016/j.mseb.2022.115865}, author = {Mutadak, Pallavi R. and Chaudhari, Nilima S. and Gadhave, Dattatraya C. and Rajput, Parikshit K. and Kolekar, Sadhu K. and Late, Dattatray J. and More, Mahendra A. and Warule, Sambhaji S.} } @article {48089, title = {Heterostructure from heteromixture: unusual OER activity of FeP and CoP nanostructures on physical mixing}, journal = {Journal of Materials Chemistry A}, volume = {10}, year = {2022}, month = {NOV}, pages = {22354-22362}, type = {Article}, abstract = {

Heterointerfaces generated by inter-domain interactions on a nanoscale play a critical role in altering the activity of an electrocatalyst towards an electrochemical process. Heterointerfaces affect the surface characteristics, electronic structure, and physicochemical properties of a nanomaterial. Herein, we report an FeP-CoP heterostructure prepared by simple physical mixing of FeP and CoP nanostructures showing a remarkable performance towards water oxidation in comparison to their individual monometallic phosphides. FeP mixed with 20 wt\% CoP shows a low overpotential (eta(10)) of 220 mV as compared to FeP (eta(10), 325 mV). Furthermore, a high current density of 1.37 A cm(-2) and mass activity of 18 987 A g(M)(-1) were also achieved at 500 mV overpotential in 1.0 M KOH. The physical mixture shows immense stability for 200 h to achieve a high current density of 200 mA cm(-2). Meanwhile the potentiostatic performance of FeP at 200 mA cm(-2) decreases to an extent of 50\% in 40 h. A full cell arrangement employing this catalyst as the anode material requires 1.56 V to attain a current density of 10 mA cm(-2). Various characterization techniques, control experiments and theoretical studies indicate that the formation of heterointerfaces between the nano-domains of FeP and CoP results in charge transfer between Fe and Co metal sites. In addition, an oxygenated surface at the metal phosphide interface favours the sorption kinetics of intermediates involved in the reaction leading to low energy barriers in the potential determining and other steps, thus showing improved performance towards water oxidation.

}, issn = {2050-7488}, doi = {10.1039/d2ta04296g}, author = {Bhutani, Divya and Maity, Sisir and Chaturvedi, Shashank and Chalapathi, Divya and Waghmare, V. Umesh and Narayana, Chandrabhas and Prabhakaran, Vinod C. and Muthusamy, Eswaramoorthy} } @article {48161, title = {Insights on biorational potential of Ocimum gratissimum essential oil and its binary combination with monoterpene phenol for control of rice weevil (Sitophilus oryzae) and aflatoxigenic fungi.}, journal = {Food Bioscience}, volume = {50}, year = {2022}, month = {DEC}, pages = {102019}, type = {Article}, abstract = {

Food grain storage is a difficult task due to insect infestation and subsequent mycotoxin contaminations which adversely affects the nutritional quality of grains and leading to economic loss. Current research focuses on contact and fumigant toxicity effects of essential oils (EO) and aroma compounds against Sitophilus oryzae and growth inhibition of aflatoxigenic fungi. The EO of Ocimum gratissimum comprised of thymol (46.8\%), gamma-terpi-nene (14.04\%) along with o-cymene (11.76\%). Also, Cymbopogon flexuosus rich in citral (76.3\%) and geraniol (84.6\%) and Cymbopogon nardus having geraniol (49.24\%) and geranyl acetate (20.9\%) were all evaluated using a dose of 25 mu L (Conc-833.3 mu L/L air) against S. oryzae. All the compounds showed significant mortality (\>95\%) at 24 h of exposure. The insecticidal property of O. gratissimum oil chemotype showed a strong contact and fumigant toxicity against S. oryzae at a highest dose of 25 mu L (Conc-833.3 mu L/L air) within 24 h. It has been further evaluated on three aflatoxigenic fungal strains which showed reduction in growth and aflatoxin content (Aflatoxin B and G), which was markedly reduced upon the treatment. The binary mixture interaction of O. gratissimum oil with monoterpene phenol (carvacrol) was assessed and the specific binary mixture of 80:20 ratio (having additive property) acts as a contact insecticide with 100\% mortality. Hence, essential oil of less explored Ocimum species (O. gratissimum) and its binary mixture could be deployed as potential biorational for control of rice weevil (Sitophilus oryzae) and aflatoxigenic Aspergillus spp.

}, keywords = {Aflatoxigenic fungi, Binary combination, Essential oil, Ocimum gratissimum, Sitophilus oryzae}, issn = {2212-4292}, doi = {10.1016/j.fbio.2022.102019}, author = {Remesh, V. Archana and Raveendran, Ashika and Bincy, K. and Wagh, Vasudev S. and Dastager, Syed G. and Babu, C. S. Vivek} } @article {47599, title = {Interrupted CuAAC-thiolation for the construction of 1,2,3-triazole-fused eight-membered heterocycles from O-/N-propargyl derived benzyl thiosulfonates with organic azides}, journal = {Advanced Synthesis \& Catalysis}, volume = {364}, year = {2022}, month = {JAN}, pages = {319-325}, type = {Article}, abstract = {A copper(I)-catalyzed interrupted click-sulfenylation of O-/N-propargyl benzyl thiosulfonates with organic azides has been disclosed. The unified CuAAC-thiolation provides a wide range of triazole-fused eight-membered heterocycles in good to high (51-94\%) yields under mild reaction conditions. Moreover, a three-component reaction is also achieved involving O-/N-propargyl benzyl thiosulfonates, benzyl bromide, and sodium azide to deliver fused-triazoles in 61-74\% yields. From a synthetic point of view, the present protocol has been demonstrated at gram-scale reactions. A plausible mechanism is also proposed based on experimental results and control experiments.}, keywords = {Eight-Membered Heterocycles, Fused-Triazoles, Interrupted-Click Reaction, Thiolation, thiosulfonates}, issn = {1615-4150}, doi = {10.1002/adsc.202101256}, author = {Reddy, Raju Jannapu and Waheed, Md and Kumari, Arram Haritha and Krishna, Gamidi Rama} } @article {48159, title = {Isolation and structural characterization of exopolysaccharide from marine Bacillus sp. and its optimization by Microbioreactor}, journal = {Carbohydrate Polymers}, volume = {285}, year = {2022}, month = {JUN }, pages = {119241}, type = {Article}, abstract = {

In the present study, a cost-effective, robust Microbioreactor based production optimization of levan like exopolysaccharide from marine Bacillus sp. SGD-03 was analysed. FE-SEM analysis has showed the significant fibrillar structure of EPS. Size exclusion chromatography and other analytical data revealed that, produced EPS has a molecular weight of 1.0 x 10(4) Da and is composed of fructose monosaccharide with hydroxyl, carbonyl, and ether groups. The backbone structure of EPS has a branching pattern of beta-(2,6) linkages which confirms the similarity with available levan like polymers. The cost-effective media composition for levan production was demonstrated. The maximum yield of crude levan obtained was 123.9 g/L by response surface methodology using robust BioLector Pro Microbioreactor, and same has been validated with shake flask, 1 L and 10 L pilot-scale fermentation.

}, keywords = {EPS, marine, Microbioreactor, Optimization, structure}, issn = {0144-8617}, doi = {10.1016/j.carbpol.2022.119241}, author = {Wagh, Vasudev S. and Said, Madhukar S. and Bennale, Jagadish S. and Dastager, Syed G.} } @article {48236, title = {Machine learning-based approach to determine infection status in recipients of BBV152 (Covaxin) whole-virion inactivated SARS-CoV-2 vaccine for serological surveys}, journal = {Computers in Biology and Medicine}, volume = {146}, year = {2022}, month = {JUL}, pages = {105419}, type = {Article}, abstract = {

Data science has been an invaluable part of the COVID-19 pandemic response with multiple applications, ranging from tracking viral evolution to understanding the vaccine effectiveness. Asymptomatic breakthrough infections have been a major problem in assessing vaccine effectiveness in populations globally. Serological discrimination of vaccine response from infection has so far been limited to Spike protein vaccines since whole virion vaccines generate antibodies against all the viral proteins. Here, we show how a statistical and machine learning (ML) based approach can be used to discriminate between SARS-CoV-2 infection and immune response to an inactivated whole virion vaccine (BBV152, Covaxin). For this, we assessed serial data on antibodies against Spike and Nucleocapsid antigens, along with age, sex, number of doses taken, and days since last dose, for 1823 Covaxin recipients. An ensemble ML model, incorporating a consensus clustering approach alongside the support vector machine model, was built on 1063 samples where reliable qualifying data existed, and then applied to the entire dataset. Of 1448 self-reported negative subjects, our ensemble ML model classified 724 to be infected. For method validation, we determined the relative ability of a random subset of samples to neutralize Delta versus wild-type strain using a surrogate neutralization assay. We worked on the premise that antibodies generated by a whole virion vaccine would neutralize wild type more efficiently than delta strain. In 100 of 156 samples, where ML prediction differed from self-reported uninfected status, neutralization against Delta strain was more effective, indicating infection. We found 71.8\% subjects predicted to be infected during the surge, which is concordant with the percentage of sequences classified as Delta (75.6\%-80.2\%) over the same period. Our approach will help in real-world vaccine effectiveness assessments where whole virion vaccines are commonly used.

}, keywords = {BBV152, Covaxin, COVID-19, Ensemble methods, Infection, machine learning, SARS-CoV-2}, issn = {0010-4825}, doi = {10.1016/j.compbiomed.2022.105419}, author = {Singh, Prateek and Ujjainiya, Rajat and Prakash, Satyartha and Naushin, Salwa and Sardana, Viren and Bhatheja, Nitin and Singh, Ajay Pratap and Barman, Joydeb and Kumar, Kartik and Gayali, Saurabh and Khan, Raju and Rawat, Birendra Singh and Tallapaka, Karthik Bharadwaj and Anumalla, Mahesh and Lahiri, Amit and Kar, Susanta and Bhosale, Vivek and Srivastava, Mrigank and Mugale, Madhav Nilakanth and Pandey, C. P. and Khan, Shaziya and Katiyar, Shivani and Raj, Desh and Ishteyaque, Sharmeen and Khanka, Sonu and Rani, Ankita and Promila and Sharma, Jyotsna and Seth, Anuradha and Dutta, Mukul and Saurabh, Nishant and Veerapandian, Murugan and Venkatachalam, Ganesh and Bansal, Deepak and Gupta, Dinesh and Halami, Prakash M. and Peddha, Muthukumar Serva and Veeranna, Ravindra P. and Pal, Anirban and Singh, Ranvijay Kumar and Anandasadagopan, Suresh Kumar and Karuppanan, Parimala and Rahman, Syed Nasar and Selvakumar, Gopika and Venkatesan, Subramanian and Karmakar, Malay Kumar and Sardana, Harish Kumar and Kothari, Anamika and Parihar, Devendra Singh and Thakur, Anupma and Saifi, Anas and Gupta, Naman and Singh, Yogita and Reddu, Ritu and Gautam, Rizul and Mishra, Anuj and Mishra, Avinash and Gogeri, Iranna and Rayasam, Geethavani and Padwad, Yogendra and Patial, Vikram and Hallan, Vipin and Singh, Damanpreet and Tirpude, Narendra and Chakrabarti, Partha and Maity, Sujay Krishna and Ganguly, Dipyaman and Sistla, Ramakrishna and Balthu, Narender Kumar and Kumar, Kiran A. and Ranjith, Siva and Kumar, B. Vijay and Jamwal, Piyush Singh and Wali, Anshu and Ahmed, Sajad and Chouhan, Rekha and Gandhi, Sumit G. and Sharma, Nancy and Rai, Garima and Irshad, Faisal and Jamwal, Vijay Lakshmi and Paddar, Masroor Ahmad and Khan, Sameer Ullah and Malik, Fayaz and Ghosh, Debashish and Thakkar, Ghanshyam and Barik, S. K. and Tripathi, Prabhanshu and Satija, Yatendra Kumar and Mohanty, Sneha and Khan, Md Tauseef and Subudhi, Umakanta and Sen, Pradip and Kumar, Rashmi and Bhardwaj, Anshu and Gupta, Pawan and Sharma, Deepak and Tuli, Amit and Chaudhuri, Saumya Ray and Krishnamurthi, Srinivasan and Prakash, L. and Rao, V. Ch and Singh, B. N. and Chaurasiya, Arvindkumar and Chaurasiya, Meera and Bhadange, Mayuri and Likhitkar, Bhagyashree and Mohite, Sharada and Patil, Yogita and Kulkarni, Mahesh and Joshi, Rakesh and Pandya, Vaibhav and Mahajan, Sachin and Patil, Amita and Samson, Rachel and Vare, Tejas and Dharne, Mahesh and Giri, Ashok and Mahajan, Sachin and Paranjape, Shilpa and Sastry, G. Narahari and Kalita, Jatin and Phukan, Tridip and Manna, Prasenjit and Romi, Wahengbam and Bharali, Pankaj and Ozah, Dibyajyoti and Sahu, RaviKumar and Dutta, Prachurjya and Singh, Moirangthem Goutam and Gogoi, Gayatri and Tapadar, Yasmin Begam and Babu, Elapavalooru V. S. S. K. and Sukumaran, Rajeev K. and Nair, Aishwarya R. and Puthiyamadam, Anoop and Valappil, Prajeesh Kooloth and Prasannakumari, Adrash Velayudhan Pillai and Chodankar, Kalpana and Damare, Samir and Agrawal, Ved Varun and Chaudhary, Kumardeep and Agrawal, Anurag and Sengupta, Shantanu and Dash, Debasis} } @article {48214, title = {MXenes: advances in the synthesis and application in supercapacitors and batteries}, journal = {Journal of Materials Research}, volume = {37}, year = {2022}, month = {NOV}, pages = {3865-3889}, type = {Review}, abstract = {

MXenes, the newest family member of the two-dimensional materials have been widely investigated for different applications, particularly in the energy storage realm. With regard to this, MXene precursors have attained widespread attention for the application in electrochemical energy storage devices especially supercapacitors and batteries. This review has comprehensively studied various synthesis strategies adopted for MXenes including the top-down and bottom-up approaches. The shift to renewable energy alternatives have focused on the electrochemical choices such as supercapacitors and batteries, the most common and relevant ones. Thus the application of MXenes and its composite in supercapacitors as electrodes have been analyzed along with its detailed mechanism and electrochemical performance. Several battery chemistries including lithium-ion, sodium-ion and other battery systems utilizing MXenes have also been discussed here. Thus the existing strategies, advancements, and drawbacks regarding the inclusivity of MXenes in the electrochemical energy systems of supercapacitors and batteries are reviewed in this article.

}, issn = {0884-2914}, doi = {10.1557/s43578-022-00770-4}, author = {Wasnik, Kundan and Pawar, Meenakshi D. and Raphael, Leya Rose and Pullanchiyodan, Abhilash and Shelke, V. Manjusha and Raghavan, Prasanth} } @article {48427, title = {Pectinase production by aspergillus niger and its applications in fruit juice clarification}, journal = {Journal of Pure and Applied Microbiology}, volume = {16}, year = {2022}, month = {NOV}, pages = {2724-2737}, type = {Article}, abstract = {

Pectinases (EC 3.2.1.15) are a class of enzymes that catalyze the depolymerization or de-esterification reactions that degrade pectic substances. In the present study, we have isolated the\ Aspergillus niger\ strain from soil samples, in India and evaluated pectinase production. The highest pectinase producing\ A. niger\ strain was further evaluated and optimized with various agricultural wastes. Plackett-Burman design (PBD) and Central composite design {\textquoteleft}(CCD){\textquoteright} were used to determine the best parameters for maximum pectinase production. Pectinase activity was increased to 99.21 U/ml after optimizing the production medium using PBD and CCD statistical analysis. A positive correlation of pectinase activity between predicted (112.65 U/ml) and experimental (99.21 U/ml with SD=0.005) optimum was observed. Maximum pectinase was produced by\ A. niger\ under submerged fermentation, utilizing orange peel, which is a cost-effective, adaptable, and environmentally friendly approach. The partially purified pectinase showed significant application for apple juice clarification and showed the ability to degrade pectin and therefore the colour change was observed in apple juice within 120 min. Maximum pectinase was produced by\ A. niger\ using agricultural waste orange peel under submerged fermentation which is an economical, versatile and eco-friendly process and pectinase showed a significant application for apple juice clarification.

}, doi = {10.22207/JPAM.16.4.43}, author = {Wagh, Vrushali and Patel, Hirvitaben and Patel, Nafisa and Vamkudoth, Koteswara Rao and Ajmera, Shanthipriya} } @article {48145, title = {Pendant propargyloxy-functionalized aromatic (co)polycarbonates: synthesis, thermal crosslinking and chemical modification}, journal = {Journal of Macromolecular Science Part A-Pure and Applied Chemistry}, volume = {59}, year = {2022}, month = {NOV}, pages = {752-763}, type = {Article}, abstract = {

A bisphenol monomer bearing pendant propargyloxy group viz, 1, 1-bis (4-hydoxyphenyl)-1-(4 {\textquoteleft}-propargyloxyphenyl) ethane (BPP) was synthesized starting from commercially available 1, 1, 1-tris (4-hydroxyphenyl) ethane (THPE) by mono O-propargylation reaction using propargyl bromide. A new series of pendant propargyloxy-functionalized aromatic (co)polycarbonates was synthesized by low-temperature solution polycondensation of BPP or different molar ratios of BPP and bisphenol-A with triphosgene in dichloromethane in the presence of triethylamine. The formation of reasonably high molecular weight (co)polycarbonates was confirmed by inherent viscosity (0.52-0.83 dL/g) and gel permeation chromatography (M-n 37,000-69,800 g/mol, polystyrene standards) measurements. C-13 NMR spectral studies supported formation of random copolycarbonates in copolymerization of BPP and BPA with triphosgene. The 10\% weight loss temperature (T-10) values of (co)polycarbonates, determined by thermogravimetric analysis under nitrogen atmosphere, were in the range 427-438 degrees C indicating their good thermal stability. The glass transition temperature (T-g) values of (co)polycarbonates were observed in the range 147-152 degrees C. The crosslinking ability of (co)polycarbonates involving pendant propargyloxy groups leading to formation of networked structure was evaluated via non-isothermal curing studies by DSC. As a proof-of-concept, the post-modification of a representative polycarbonate bearing pendant propargyloxy groups with 1-octane thiol as a model compound via thiol-yne click reaction was briefly studied.

}, keywords = {Aromatic polycarbonate, Chemical modification, propargyloxy groups, thermal crosslinking, thiol-yne click reaction}, issn = {1060-1325}, doi = {10.1080/10601325.2022.2117055}, author = {Nagane, Samadhan S. and Maher, Deepak M. and Verma, Savita and Talanikar, Aniket A. and Wadgaonkar, Prakash P.} } @article {48402, title = {Post-polymerization modifiable aromatic (co)poly(ether sulfone)s possessing pendant norbornenyl groups based upon a new bisphenol}, journal = {European Polymer Journal}, volume = {176}, year = {2022}, month = {AUG }, pages = {111431}, type = {Article}, abstract = {

A new bisphenol possessing pendant norbornenyl group viz., 4, 4 {\textquoteleft}-(bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) was synthesized by a single-step base-catalyzed condensation reaction of 5-norbor-nene-2-carboxaldehyde with guaiacol. NMR spectral data indicated formation of BPA-NB comprising of isomeric components. A series of (co)poly(ether sulfone)s possessing pendant norbornenyl groups was synthesized by nucleophilic aromatic substitution polycondensation of varying molar ratio of BPA-NB and bisphenol-A (BPA) with bis(4-fluorophenyl) sulfone. Inherent viscosity values and number average molecular weights of (co)poly (ether sulfone)s were in the range 0.67-1.01 dL/g and 75,400-1,16,300 g/mol, respectively indicating the formation of reasonably high molecular weight polymers. Tough, transparent, and flexible films could be cast from chloroform solutions of these (co)poly(ether sulfone)s. (Co)poly(ether sulfone)s were characterized using FT-IR, H-1 NMR and C-13 NMR spectroscopy, XRD, TGA and DSC analysis. The formation of random copoly(ether sulfone)s was demonstrated by( 13)C NMR analysis. The incorporation of BPA-NB into (co)poly(ether sulfone)s resulted into improvement in Tg values. BPA-NB-based (co)poly(ether sulfone)s offered possibilities for post -modifications involving either methoxyl or norbornenyl groups. A representative copoly(ether sulfone) (PSU-NB-2) possessing pendant norbornenyl groups was chemically modified via thiol-ene reaction with three representative thiol compounds, namely, 1-dodecanethiol, 2-furanmethanethiol and 2-mercaptoethanol to yield corresponding post-modified polymers in a quantitative manner. Additionally, it was demonstrated that copoly (ether sulfone) possessing pendant norbornenyl groups could be used to form insoluble cross-linked gel in the presence of a multifunctional thiol cross-linker.

}, keywords = {(Co)poly(ether sulfone)s, bisphenol, Cross -linking, Pendant norbornenyl groups, Thiol-ene reaction}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2022.111431}, author = {Talanikar, Aniket A. and Nagane, Samadhan S. and Wadgaonkar, Prakash P. and Rashinkar, Gajanan S.} } @article {48179, title = {Potassium phosphate catalyzed highly efficient synthesis of structurally diverse thioethers at ambient temperature}, journal = {Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry}, volume = {61}, year = {2022}, month = {FEB}, pages = {154-158}, type = {Article}, abstract = {

Commercially available potassium phosphate has been demonstrated to be a highly efficient catalyst for the synthesis of thioethers employing two different routes viz. alkylation of thiols with alkyl/aralkyl halides and by Michael addition of thiols to conjugated alkenes.

}, keywords = {Alkyl halides, Potassium phosphate, thia-Michael reaction, thioethers, thiols}, issn = {0019-5103}, author = {Mitragotri, Satish D. and Kulkarni, Makarand A. and Desai, V. Uday and Wadagaonkar, Prakash P.} } @article {48182, title = {Protophilic solvent-impelled quasi-catalytic CO2 valorization to formic acid and N-formamides}, journal = {Fuel}, volume = {326}, year = {2022}, month = {OCT}, pages = {125074}, type = {Article}, abstract = {

As a low-price and luxuriant C1 sustainable resource, CO2 has the privilege of synthesizing hydrogen carriers and valuable chemicals. However, expensive metallic and organic catalysts are often indispensable for going on wheels of the relevant reaction processes. In this work, a protophilic solvent-impelled quasi-catalytic system was developed for efficient synthesis of formic acid and various N-formamides with high yields of 76-94\% via reductive CO2 functionalization under mild reaction conditions (50 ?). Direct activation of the liquid hydrosilane toward the reduction of CO2 enabled by DMSO with optimum basicity/protophilicity is the predominant reaction route among the examined interaction models, while carbonic acid potentially derived from excessive CO2 and residual water inhibits the reaction, as explicitly disclosed by theoretical calculations and isotope labeling experiments. In addition, the in situ formed O-formyl species is conductive to the cascade CO2 reduction steps, which remarkably facilitated the overall quasi-catalytic upgrading process.

}, keywords = {CO2 utilization, Formic acid, Green energy, Nitrogenous chemicals, Quasi-catalysis}, issn = {0016-2361}, doi = {10.1016/j.fuel.2022.125074}, author = {Wu, Hongguo and Li, Hu and Zhao, Wenfeng and Sudarsanam, Putla and Yang, Song} } @article {47757, title = {Steroidal alkaloids defence metabolism and plant growth are modulated by the joint action of gibberellin and jasmonate signalling}, journal = {New Phytologist}, volume = {233}, year = {2022}, month = {FEB}, pages = {1220-1237}, type = {Article}, abstract = {Steroidal glycoalkaloids (SGAs) are protective metabolites constitutively produced by Solanaceae species. Genes and enzymes generating the vast structural diversity of SGAs have been largely identified. Yet, mechanisms of hormone pathways coordinating defence (jasmonate; JA) and growth (gibberellin; GA) controlling SGAs metabolism remain unclear. We used tomato to decipher the hormonal regulation of SGAs metabolism during growth vs defence tradeoff. This was performed by genetic and biochemical characterisation of different JA and GA pathways components, coupled with in vitro experiments to elucidate the crosstalk between these hormone pathways mediating SGAs metabolism. We discovered that reduced active JA results in decreased SGA production, while low levels of GA or its receptor led to elevated SGA accumulation. We showed that MYC1 and MYC2 transcription factors mediate the JA/GA crosstalk by transcriptional activation of SGA biosynthesis and GA catabolism genes. Furthermore, MYC1 and MYC2 transcriptionally regulate the GA signalling suppressor DELLA that by itself interferes in JA-mediated SGA control by modulating MYC activity through protein-protein interaction. Chemical and fungal pathogen treatments reinforced the concept of JA/GA crosstalk during SGA metabolism. These findings revealed the mechanism of JA/GA interplay in SGA biosynthesis to balance the cost of chemical defence with growth.}, keywords = {alpha-tomatine, defence, gibberellin (GA), growth, jasmonate (JA), steroidal glycoalkaloids (SGAs), Tomato}, issn = {0028-646X}, doi = {10.1111/nph.17845}, author = {Panda, Sayantan and Jozwiak, Adam and Sonawane, Prashant D. and Szymanski, Jedrzej and Kazachkova, Yana and Vainer, Andrii and Kilambi, Himabindu Vasuki and Almekias-Siegl, Efrat and Dikaya, Varvara and Bocobza, Samuel and Shohat, Hagai and Meir, Sagit and Wizler, Guy and Giri, Ashok P. and Schuurink, Robert and Weiss, David and Yasuor, Hagai and Kamble, Avinash and Aharoni, Asaph} } @article {48106, title = {Superior processability of Antheraea mylitta silk with cryo-milling: performance in bone tissue regeneration}, journal = {International Journal of Biological Macromolecules}, volume = {213}, year = {2022}, month = {JUL}, pages = {155-165}, type = {Article}, abstract = {

Non-mulberry silk polymers have a promising future in biomedical applications. However, the dissolution of nonmulberry silk fiber is a still challenge and this poor processability has limited the use of this material. Here, we report a unique protocol to process the Antheraea mylitta (AM) silk fiber. We have shown that the cryo-milling of silk fiber reduces the beta sheet content by more than 10\% and results in an SF powder that completely dissolves in routine solvents like trifluoroacetic acid (TFA) within few hours to form highly concentrated solutions (\~20 wt \%). Further, these solutions can be processed using conventional processing techniques such as electrospinning to form 3D scaffolds. Bombyx mori (BM) silk was used as a control sample in the study. In-vitro studies were also performed to monitor cell adhesion and proliferation and hMSCs differentiation into osteogenic lineage. Finally, the osteogenic potential of the scaffolds was also evaluated by a 4-week implantation study in rat calvarial model. The in-vitro and in-vivo results show that the processing techniques do not affect the biocompatibility of the material and the AM scaffolds support bone regeneration. Our results, thus, show that cryo-milling facilitates enhanced processability of non-mulberry silk and therefore expands its potential in biomedical applications.

}, keywords = {Bone tissue engineering, Calvarial defect, hMSCs, Non-mulberry silk fiber, Processing technique}, issn = {0141-8130}, doi = {10.1016/j.ijbiomac.2022.05.122}, author = {Parekh, Nimisha and Bijosh, C. K. and Kane, Kartiki and Panicker, Alaka and Nisal, Anuya and Wangikar, Pralhad and Agawane, Sachin} } @article {48204, title = {Synthesis and characterization of partially biobased aromatic (Co)polycarbonates containing biphenylene units and pendant pentadecyl chains}, journal = {Macromolecular Chemistry and Physics}, volume = {223}, year = {2022}, month = {JUL}, pages = {2100449}, type = {Article}, abstract = {

2-Pentadecyl-[1,1{\textquoteright}{\textquoteright}-biphenyl]-4,4{\textquoteright}{\textquoteright}-diol (PBD) is synthesized starting from cashew nut shell liquid-a by-product of cashew processing industry. A new series of partially biobased aromatic (co)polycarbonates possessing biphenylene units and pendant pentadecyl chains is synthesized by solution polycondensation of PBD or varying compositions of PBD and bisphenol-A with triphosgene in dry dichloromethane. Inherent viscosities and number average molecular weights of (co)polycarbonates are in the range 0.51-1.24 dL g(-1) and 18 x 10(3)- 43.4 x 10(3) g mol(-1), respectively indicating the formation of reasonably high molecular weight polymers. Flexible, transparent, and free-standing films of (co)polycarbonates can be cast from chloroform solution. (Co)polycarbonates are characterized using Fourier transform infrared spectroscopy (FTIR), H-1 NMR, C-13 NMR spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry, and thermogravimetric analysis. T-10 and T-g values of (co)polycarbonates are in the range 417-433 and 8-147 degrees C, respectively. It is demonstrated that the T-g values can be tuned by incorporation of appropriate mol\% of PBD as a comonomer in Bisphenol-A-based copolycarbonates. The lowering of the T-g values of (co)polycarbonates can be attributed primarily to the packing disruptive effect of flexible pentadecyl chains. Furthermore, the effect of incorporation of PBD as a comonomer on water contact angle values of (co)polycarbonates is evaluated.

}, keywords = {aromatic polycarbonates, biobased bisphenol, Cashew nut shell liquid, pentadecyl chain, Renewable resources}, issn = {1022-1352}, doi = {10.1002/macp.202100449}, author = {Ichake, Amol B. and Nagane, Samadhan S. and Jadhav, Uday A. and Torris, Arun and Grau, Etienne and Cramail, Henri and Wadgaonkar, Prakash P.} } @article {48433, title = {Synthesis, characterization and post-modification of aromatic (Co)polyesters possessing pendant maleimide groups}, journal = {High Performance Polymers}, volume = {35}, year = {2022}, month = {SEP}, type = {Article}, abstract = {

A new series of (co)polyesters possessing pendent maleimide groups was synthesized by low temperature solution polycondensation of 4, 4{\textquoteright}-(5-maleimidopentane-2, 2-diyl) diphenol (BPA-MA) with isophthalic acid chloride (IPC), terephthalic acid chloride (TPC) and a mixture of TPC and IPC (50:50\ mol \%). Copolyesters were also synthesized by polycondensation of varying compositions of BPA-MA and bisphenol-A (BPA) with IPC. The chemical structures and compositions of (co)polyesters were confirmed by NMR spectroscopy. Inherent viscosity values and number-average molecular weights of (co)polyesters were in the range 0.50{\textendash}0.76\ dL/g and 17,700-32,100\ g/mol, respectively, indicating the formation of reasonably high molecular weight polymers. (Co)polyesters were readily soluble in common organic solvents and could be cast into tough, transparent and flexible films from chloroform solutions. (Co)polyesters exhibited 10\% weight loss and glass transition temperatures in the range 464{\textendash}468 and 142{\textendash}178{\textdegree}C, respectively. A representative copolyester possessing pendant maleimide groups was chemically modified\ via\ metal-free azide-maleimide 1,3-dipolar cycloaddition click reaction with two azido compounds, namely, (azidomethyl)benzene (Bz-N3) and 1-(azidomethyl)-pyrene (Py-N3) to yield corresponding modified copolyesters in a quantitative manner.

}, author = {Jadhav, Uday A. and Nagane, Samadhan S. and Wadgaonkar, Prakash P.} } @article {48138, title = {Synthesis, characterization and UV-crosslinking of aromatic (Co)polycarbonates bearing pendant azido groups}, journal = {ChemistrySelect}, volume = {7}, year = {2022}, month = {SEP}, pages = {e202201020}, type = {Article}, abstract = {

A new series of (co)polycarbonates bearing pendent azido groups was synthesized by polycondensation of varying molar proportions of 4, 4{\textquoteright}-(5-azidopentane-2, 2-diyl) diphenol and bisphenol-A with triphosgene. The chemical structures, compositions and random nature of (co)polycarbonates were confirmed by NMR spectroscopy. Inherent viscosities and number-average molecular weights of (co)polycarbonates were in the range 0.63-0.77 dL g(-1) and 35,400-43,400 g mol(-1), respectively indicating the formation of reasonably high molecular weight polymers. (Co)polycarbonates could be cast into tough, transparent and flexible films from chloroform solutions. (Co)polycarbonates were further characterized using IR spectroscopy, XRD, TGA and DSC. The thermal crosslinking of (co)polycarbonates bearing pendant azido groups was studied by DSC analysis. Independently, (co)polycarbonates bearing pendant azido groups were exposed to UV irradiation at wavelength of 254 nm and decomposition reaction of azido groups was monitored by FT-IR spectroscopy. The complete decomposition of azido groups was observed with exposure time of 30 min. The formed cross-linked (co)polycarbonates exhibited improved \% char yield values compared to parent (co)polycarbonates. The measurement of mechanical properties of representative crosslinked (co)polycarbonates indicated increase in tensile strength and Young{\textquoteright}s modulus and decrease in \% elongation compared to corresponding parent linear (co)polycarbonates.

}, keywords = {Aromatic polycarbonate, Pendant azido group, solution polycondensation, Triphosgene, UV-crosslinking}, issn = {2365-6549}, doi = {10.1002/slct.202201020}, author = {Nagane, Samadhan S. and Kuhire, Sachin S. and Ichake, Amol B. and Talanikar, Aniket A. and Lochab, Bimlesh and Wadgaonkar, Prakash P.} } @article {47827, title = {Vitrimers based on bio-derived chemicals: overview and future prospects}, journal = {Chemical Engineering Journal}, volume = {433}, year = {2022}, month = {APR}, pages = {133261}, type = {Article}, abstract = {The perspective of using recyclable and biobased materials in the vitrimeric concept is attractive, in view of the regulatory guidelines and pressing need to reduce CO2-emissions. The expansion of viable bio-based polymeric materials is gaining increased attention to achieve sustainable development goals. Although durability, cost, and performance still limit their real life applications, these limitations can be overcome through state-of-the-art bio-vitrimeric materials displaying thermoset like mechanical and thermal properties as well as thermoplastic like malleable and thus recyclable properties. Bio-derived chemicals based vitrimers can be of advantage, where material design is made from scratch, allowing to plan material properties in line with their future life cycle from the very beginning. This article emphasizes the current needs of vitrimers based on bio-derived chemicals, including their recycling, reprocessing, and self-healing properties, along with their advantages and potential obstacles from todays{\textquoteright} perspective. The article also identifies potential bio-derivatives as attractive building blocks for vitrimers because of their potential for sustainability.}, keywords = {Recycling, Self-healing, Sustainable materials, Vitrimers}, issn = {1385-8947}, doi = {10.1016/j.cej.2021.133261}, url = {https://www.sciencedirect.com/science/article/pii/S1385894721048361}, author = {Balaji Krishnakumar and Andrea Pucci and Prakash P. Wadgaonkar and Indresh Kumar and Wolfgang H. Binder and Sravendra Rana} } @article {48335, title = {2D layered nanomaterials as fillers in polymer composite electrolytes for lithium batteries}, journal = {Advanced Energy Materials}, volume = {13}, year = {2023}, month = {APR}, type = {Review}, abstract = {

Polymer composite electrolytes (PCEs), i.e., materials combining the disciplines of polymer chemistry, inorganic chemistry, and electrochemistry, have received tremendous attention within academia and industry for lithium-based battery applications. While PCEs often comprise 3D micro- or nanoparticles, this review thoroughly summarizes the prospects of 2D layered inorganic, organic, and hybrid nanomaterials as active (ion conductive) or passive (nonion conductive) fillers in PCEs. The synthetic inorganic nanofillers covered here include graphene oxide, boron nitride, transition metal chalcogenides, phosphorene, and MXenes. Furthermore, the use of naturally occurring 2D layered clay minerals, such as layered double hydroxides and silicates, in PCEs is also thoroughly detailed considering their impact on battery cell performance. Despite the dominance of 2D layered inorganic materials, their organic and hybrid counterparts, such as 2D covalent organic frameworks and 2D metal-organic frameworks are also identified as tuneable nanofillers for use in PCE. Hence, this review gives an overview of the plethora of options available for the selective development of both the 2D layered nanofillers and resulting PCEs, which can revolutionize the field of polymer-based solid-state electrolytes and their implementation in lithium and post-lithium batteries.

}, keywords = {2D materials, clay minerals, covalent organic frameworks, metal-organic frameworks, MXene, polymer composite electrolyte, solid-state batteries}, issn = {1614-6832}, doi = {10.1002/aenm.202203326}, author = {Vijayakumar, Vidyanand and Ghosh, Meena and Asokan, Kiran and Sukumaran, Santhosh Babu and Kurungot, Sreekumar and Mindemark, Jonas and Brandell, Daniel and Winter, Martin and Nair, Jijeesh Ravi} } @article {48743, title = {Bimetallic quantum dots (Cu-Pd, Ni-Pd) catalyzed reaction of bromo arenes with alkenes and aryl boronic acids}, journal = {Indian Journal of Chemistry}, volume = {62}, year = {2023}, month = {AUG}, pages = {843-848}, type = {Article}, abstract = {

Bimetallic quantum dots (Cu-Pd and Ni-Pd) are active ligand-free catalysts for the alkenylation and arylation of aryl bromides. The catalysts are easy to synthesize by benign green protocols and characterized by various techniques. The bimetallic QD catalysts synthesized thus are superior to Pd(OAc)2 or other Pd NP catalysis of alkenylation reactions of aryl bromides with similar E-selectivity. The reaction of aryl bromide with aryl boronic acid is facile with high yields.

}, keywords = {Aryl bromides, Bimetallic QDs catalysis, Cu-Pd, Mizoroki-Heck, Ni-Pd, Suzuki coupling}, issn = {0019-5103}, doi = {10.56042/ijc.v62i8.4769}, author = {Raut, Pallavi K. and Meroliya, Heena K. and Dumbre, Swapnil R. and Patil, Vaishali N. and Solanki, Bhanupratap S. and Waghmode, Shobha A. and Iyer, Suresh} } @article {48309, title = {Cobalt-manganese modified theophrastite phase of nickel hydroxide nanoflower arrays on nickel foam as a self-standing bifunctional electrode for overall water electrolysis}, journal = {Sustainable Energy \& Fuels}, volume = {7}, year = {2023}, month = {MAY}, pages = {2428-2440}, type = {Article}, abstract = {

Designing and developing self-supported electrodes for water electrolysis is attractive as compared to conventional catalyst-coated electrodes. Herein, a (Co0.3Mn0.1Ni0.6)(OH)(2)/NF nanocomposite is prepared by anchoring (Co0.3Mn0.1Ni0.6)(OH)(2)via simple one-pot hydrothermal synthesis on nickel foam. The presence of Mn induces the external electronic structure of Co(OH)(2), and this also improves the electrochemically active surface area (ECSA). These favor better accessibility of active sites and increased intrinsic activity for the OER and HER. (Co0.3Mn0.1Ni0.6)(OH)(2)/NF has shown promising electrochemical activity toward the OER and HER in a 1 M KOH electrolyte, with an overpotential of 270 mV for the OER and 163 mV for the HER to deliver 10 mA cm(-2) current density. The overall water splitting was performed by employing (Co0.3Mn0.1Ni0.6)(OH)(2)/NF as both the cathode and anode by displaying a voltage of 1.62 V at 10 mA cm(-2), which is comparable to that extracted from a similar system based on the state-of-the-art Pt/C@NF cathode and RuO2@NF anode (1.60 V at 10 mA cm(-2)) standard electrode pair. Interestingly, at high current densities, the (Co0.3Mn0.1Ni0.6)(OH)(2)/NF//(Co0.3Mn0.1Ni0.6)(OH)(2)/NF system displayed better overall water splitting performance (1.78 V at 100 mA cm(-2)) compared to its Pt/C@NF//RuO2@NF (1.89 V at 100 mA cm(-2)) counterpart while displaying a stable output during the evolution period that lasted for 24 h. The amounts of H-2 and O-2 produced are estimated to be 701.2 and 358.6 mmol, respectively, at a time interval of 1 h; these amounts correspond to an similar to 1 : 2 ratio of O-2 and H-2, respectively. This study confirms the capability for employing (Co0.3Mn0.1Ni0.6)(OH)(2)/NF as a bi-functional and self-standing electrode for the realistic demonstrations of overall water splitting applications.

}, issn = {2398-4902}, doi = {10.1039/d3se00233k}, author = {Kharabe, Geeta Pandurang and Illathvalappil, Rajith and Barik, Sidharth and Kanheerampockil, Fayis and Walko, Priyanka S. and Bhat, Suresh K. and Devi, R. Nandini and Kurungot, Sreekumar} } @article {48316, title = {Controlled synthesis of thermosensitive tunable porous film of (pNIPAM)-b-(PCL) copolymer for sustain drug delivery}, journal = {Journal of Applied Polymer Science}, volume = {140}, year = {2023}, month = {MAY}, pages = {e53854}, type = {Article}, abstract = {

There have been reports on different types of porous polymer films for various applications. The designing of such porous films with uniform properties is a challenging task. In this work, tunable porous thin films of poly(N-isopropylacrylamide) (pNIPAM) and polycaprolactone (PCL), that is, (pNIPAM)-b-(PCL) has been fabricated and its sustained drug delivery applications have been reported. First, the (pNIPAM)-b-(PCL) has been synthesized through the addition polymerization of pNIPAM and PCL. Then the synthesized (pNIPAM)-b(PCL) has been used to design porous thin film with varying temperatures without using any external template, below and above the lower critical solution temperatures (LCST) of pNIPAM. Pore size in (pNIPAM)-b-(PCL) films has been tuned by varying the temperature from similar to 10 to 40 degrees C. Then the developed thermosensitive porous film has been taken and seeded with the K562 (chronic myeloid leukemia blood cancer) and HepG2 (hepatocarcinoma) cells and the skin cancer cells (B16-F10) killing efficiency of anticancer drug (e.g., doxorubicin hydrochloride, DOX) loaded (pNIPAM)-b-(PCL) film has been studied. It is found that the DOX-loaded (pNIPAM)-b-(PCL) can efficiently kill the skin cancer cells. The porous polymer thin film reported in this work can be a versatile platform for the loading of drugs and it can be used for the various therapeutic applications.

}, keywords = {Biomaterials, Biomedical Applications, drug delivery systems, films, nanostructured polymers}, issn = {0021-8995}, doi = {10.1002/app.53854}, author = {Amgoth, Chander and Patra, Sukanya and Wasnik, Kirti and Maity, Pradip and Paik, Pradip} } @article {48443, title = {Developing a mealybug pheromone monitoring tool to enhance IPM practices in New Zealand vineyards}, journal = {Journal of Pest Science}, volume = {96}, year = {2023}, month = {JAN}, pages = {29-39}, type = {Article}, abstract = {

Mealybugs are phloem-feeding insects found on many crops worldwide. In New Zealand vineyards, they transmit the economically important Grapevine leafroll-associated virus 3 (GLRaV-3). For some mealybug species, synthetic sex pheromones have been commercialised, and are used as monitoring tools. The mealybugs Pseudococcus longispinus and Pseudococcus calceolariae are major pests in many New Zealand vineyards. We present work on the development of a combined P. longispinus and P. calceolariae pheromone lure. The optimal dose for monitoring P. longispinus was found to be 10 mu g of the (S)-(+)-enantiomer, either alone or in the racemic mixture. Addition of the corresponding alcohol did not improve trap catch of P. longispinus. Both the P. longispinus and the P. calceolariae pheromone lures remained active in the field for 90 days. Combining the 2 species{\textquoteright} pheromones had no negative effects on male mealybug trap catch for either species. We conclude that the pheromone ester alone is the best lure for the male P. longispinus. Combining the two mealybug species{\textquoteright} pheromones into a single lure provides the New Zealand viticultural industry with an efficient monitoring tool. Late-vintage deployment of baited lures will provide information on mealybug abundance and local distribution that will inform the scope of future insecticide programmes, to target areas based on need rather than an area-wide application by default.

}, keywords = {Citrophilus mealybug, Integrated pest management (IPM), Long-tailed mealybug, monitoring, Pseudococcus calceolariae, Pseudococcus longispinus}, issn = {1612-4758}, doi = {10.1007/s10340-022-01504-5}, author = {Sullivan, Nicola J. and Bell, Vaughn A. and Butler, Ruth C. and Wallis, Roger and Ramesh, Remya and Reddy, D. Srinivasa and Twidle, Andrew M. and Bunn, Barry and Unelius, C. Rikard and Manning, Lee-Anne M. and Suckling, David M.} } @article {48787, title = {Dual-mode porous and highly graphitized 3D nitrogen-doped carbon network as an advance anode material for sodium-ion batteries}, journal = {Journal of Physical Chemistry C}, volume = {127}, year = {2023}, month = {JUL}, pages = {14053-14064}, type = {Article}, abstract = {

The practical application of hard carbons as the mostappealinganode material for sodium-ion batteries is hampered by their poorcycling and rate performances, emanating from poor electrochemicalstability, low electroconductivity, and sluggish Na+ transport.Designing a single remedial method for these challenges often involvescomplex and energy-intensive processes, contradicting the core conceptof cost-effectiveness for practical energy storage technology. Herein,we employed trifunctional silica (SiO2): as colloidal silicato ice template micron-sized pores, as a hard template for nanopores,and as a catalyst for the graphitization of carbon for the synthesisof a highly graphitized, efficiently nitrogen-doped, high-surface-area,three-dimensional porous carbon network (3D PNC) with dual-mode porosity(nanopores and micron-sized pores). As an anode material, the obtained3D PNC exhibits a reversible capacity of 262 mAh g(-1) at a current density of 100 mA g(-1), an ultrahighrate capability of 173 mAh g(-1) at 1 A g(-1), and a stable cycling life of 1000 cycles at a high current densityof 100 mA g(-1) with almost 100\% capacity retention.The galvanostatic intermittent titration technique (GITT) revealsfacile sodium diffusion kinetics with an average diffusion coefficientof an order of \& SIM;10(-9) (cm(2) s(-1)), which is fairly low compared to most reported HCanodes for SIBs. This work demonstrates how a merger of two or moresynthesis methodologies can be employed for the advanced microstructureengineering of carbon materials, opening up new avenues for the rationaldesign of anode materials in SIBs.

}, issn = {1932-7447}, doi = {10.1021/acs.jpcc.3c01773}, author = {Dar, Mudasir and Suresh, Karthika and Majid, Kowsar and Wahid, Malik} } @article {48329, title = {Few-layer graphene lithiophilic and sodiophilic diffusion layer on porous stainless steel as lithium and sodium metal anodes}, journal = {Chemistry-An Asian Journal}, volume = {18}, year = {2023}, month = {APR }, type = {Article}, abstract = {

In order to subdue the obvious problem of uneven electric field distribution on regularly used copper/aluminum current collectors for alkali metal batteries, graphene on porous stainless steel (pSS_Gr) was fabricated using the ion etching technique that is employed as an effective host for lithium and sodium metal anodes. The binder-free pSS_Gr demonstrated stable Li plating and stripping at areal current and capacity of 6 mA cm(-2) and 2.54 mAh cm(-2), respectively, for over 1000 cycles with 98\% coulombic efficiency (C.E.). Also, in the case of Na metal anode, the host has shown stable performance at 4 mA cm(-2) and 1 mAh cm(-2) over 1000 cycles with similar to 100\% C.E.. Further, a full cell composed of Li-plated pSS_Gr as an anode and LiFePO4 as a cathode is electrochemically tested at 50 mA g(-1) current density with stable 100 cycles.

}, keywords = {Few layer graphene, Free-standing, Li and Na metal functional host, Na depth profiles, post-cycling XPS}, issn = {1861-4728}, doi = {10.1002/asia.202300068}, author = {Patrike, Apurva and Wasnik, Kundan and Shelke, Manjusha V.} } @article {48829, title = {High rate, high temperature, dendrite free plating/stripping of Li in 3-dimensional honeycomb boron carbon nitride to realize an ultrastable lithium metal anode}, journal = {Journal of Energy Storage}, volume = {68}, year = {2023}, month = {SEP}, pages = {107547}, type = {Article}, abstract = {

Lithium (Li) metal could be the anode of choice for energy dense Li-batteries owing to its high theoretical specific capacity. However, low coulombic efficiency and poor safety on account of the occurrence of the Li-dendrites during charging-discharging pose a bottleneck for practical applications. In this work, we report a high-rate plating and stripping of Li through host engineering to realize ultrastable Li metal anode (LMA). Benchmark plating/stripping efficiency could be achieved via uniquely structured, highly ordered honeycomb boron carbon nitride (HBCN) as a functional scaffold. Boron and nitrogen doping, large surface area and ordered mesoporous structure induce homogeneous solid electrolyte interface (SEI) layer formation and provide numerous nucleation sites with subsequent dendrite-free growth with 99.98 \% coulombic efficiency at 8 mA cm(-2) high current and 10 mAh cm(-2) capacity over 3000 cycles. Via post-cycling advanced characterizations techniques of Ex-situ XPS, 3D X-ray micro-tomography analyses and FESEM, we demonstrate the formation of a stable SEI layer and morphological changes that occurred during Li plating cycles in the HBCN structure. Computational studies validate the high lithium plating-stripping efficacy of HBCN to its highly ordered porous nature, exothermic Li-binding and upshift in the Fermi levels. When tested at elevated temperature (50 degrees C), a stable Li plating-stripping in HBCN is realised at 4 mA cm(-2) current and 10 mAh cm(-2) capacity values with similar to 100 \% C.E. Furthermore, we report the results of testing a Li metal cell comprised of Li deposited HBCN anode and LiFePO4 (LFP) cathode.

}, keywords = {Boron carbon nitride, Dendrite-free Li metal anode, Functional scaffold, High temperature plating/stripping of Li, Molecular planarity parameter, X-ray micro-tomography}, issn = {2352-152X}, doi = {10.1016/j.est.2023.107547}, author = {Patrike, Apurva and Karbhal, Indrapal and Wasnik, Kundan and Torris, Arun and Maibam, Ashakiran and Krishnamurty, Sailaja and Shelke, V, Manjusha} } @article {48750, title = {Novel shear thickening fluids possessing high shear rates using monodispersed silica nanoparticles and PEG}, journal = {Polymer Bulletin}, volume = {80}, year = {2023}, month = {DEC}, pages = {13069-13098}, type = {Article}, abstract = {

Higher shear rate possessing homogeneous shear thickening fluids were synthesized using monodispersed silica nanoparticles and polyethylene glycol (PEG). Novel homogeneous methodology was developed for the synthesis of shear thickening fluids using monodispersed silica nanoparticles and PEG. Shear rate of shear thickening fluids (STF) was determined using rheometer at room temperature. The normal shear rate was observed in the range of 100 to 1200 s(-1), whereas higher shear rate 2000 s(-1) was obtained using monodispersed silica nanoparticles, PEG and shear rate enhancer. Monodispersed silica nanoparticles were synthesized in a typical one-pot using modified Stober{\textquoteright}s method at room temperature. Precursors were used for the synthesis of monodispersed silica nanoparticles such as tetraethyl orthosilicate (TEOS), ethanol, deionized water and ammonia as catalyst. Particle size of monodispersed silica nanoparticles was in the range of 100-1200 nm, and particle size distribution was varied from 0.000 to 0.221. Synthesis of monodispersed silica nanoparticles was studied by various parameters, namely effect of TEOS concentration, grade of ethyl alcohol, ammonia concentration and water concentration. TEOS concentration effect shows particle size and particle size distribution increases with increase in concentration of TEOS. Even though concentration of TEOS was increased up to 5 times the observation was same for all particle sizes such as 100, 300 and 500 nm. Particularly in the case of 300 nm monodispersed silica nanoparticle synthesis, as TEOS concentration was increased from 1 to 5X (5 times) the particle size was increased from 331.7, 447.8, 497.0, 512.0 and 531.7 nm and particle size distribution was 0.005, 0.000, 0.006, 0.007 and 0.089, respectively. The effect of grade of ethyl alcohol illustrates that Indian rectified spirit shows almost similar results with respect to China make ethyl alcohol. Comparative study of China and Indian rectified spirit shows silica nanoparticle size was 174.6 and 174.2 nm, and particle size distribution was 0.065 and 0.071, respectively. Ammonia concentration effect explains particle size and particle size distribution increases with increase in concentration of ammonia. Water concentration effect shows particle size and particle size distribution increases with increase in concentration of ammonia. Comparative data of water concentration effect for 1316 and 1974 mL shows particle size were 321.7 and 488.0 nm, and particle size distribution was 0.083 and 0.05, respectively, under similar conditions. Morphological studies displayed the shape of the silica nanoparticles was spherical, monodispersed and isolated. A typical TEM image of monodispersed silica nanoparticles for 500 nm was observed with extremely low polydispersity, i.e., 0.000. It is very difficult to get such a type of excellent photograph of monodispersity by Stober{\textquoteright}s method particularly on large scale. Rheology study of homogeneous shear thickening fluids studied by varying the parameters such as composition of silica nanoparticles with PEG, effect of amount of solvent, effect of refluxing time, effect of additive with respect to the mol. wt. of PEG and effect of additive such as Tannin. All these parameters of STF explored with respect to the shear rate and shear viscosity. Effect of ethanol amount on STF demonstrates the shear rate increases with increase in amount of solvent. Effect of refluxing time on STF exhibits the shear rate increases with increase in refluxing time. Effect of composition based on 500 nm monodispersed silica nanoparticles and PEG 200 with respect to 60:40, 65:35 and 70:30 composition was studied and the results predict that shear rate increases with increase in silica percentage in composition, i.e., 118, 265 and 1200 s(-1) for 60:40, 65:35 and 70:30 composition, respectively, whereas maximum viscosity decreases with increase in silica content, i.e., 2.559, 1.420 and 1.200 Pa.s for 60:40, 65:35 and 70:30 composition, respectively. Effect of additive on shear rate and shear viscosity illustrates that shear rate decreases with increase in additive percentage in composition, whereas maximum viscosity increases with increase in additive content. Effect of additives on shear rate and shear viscosity was performed using 65:35 composition with respect to PEG 200 along with PEG 6000 shows shear rate was decreased from 142 to 6.42 s(-1) and maximum viscosity was increased from 56.1 to 571.0 Pa.s when the quantity of PEG 6000 was doubled. In general, additive decreases shear rate and increases shear viscosity (maximum). But effect of Tannin as an additive on 500 nm monodispersed silica nanoparticles with PEG 200 using 70:30 composition showed enormous increase in shear rate, i.e., 2000 s(-1). This is anomalous behavior of additive was observed.

}, keywords = {Monodispersed silica nanoparticles, Nanocomposite, Polyethylene glycol, Shear rate, Shear thickening fluid}, issn = {0170-0839}, doi = {10.1007/s00289-023-04696-7}, author = {Chavan, Nayaku and Dhage, Atul and Wale, Apparav and Thorave, Asmita and Rajdeo, Kishor and Kamble, Sanjay and Ponrathnam, Surendra and Tambe, Sanjeev and Verma, Sanjeevkumar} } @article {48451, title = {Oligothiophene-ring-strapped perylene bisimides: functionalizable coaxial donor-acceptor macrocycles}, journal = {Angewandte Chemie-International Edition}, volume = {62}, year = {2023}, month = {JAN}, type = {Article}, abstract = {

Aesthetic designs from nature enable new knowledge to be gained and, at the same time, inspire scientific models. In this context, multicomponent macrocycles embody the advantage of precisely positioning the structural units to achieve efficient communication between them. However, the construction of a functionalizable macrocycle for ultrafast charge separation and stabilization has not been attempted. Herein, we report the synthesis, crystal structure, and transient absorption of a new functionalizable macrocycle consisting of an oligothiophene-ring-strapped perylene bisimide. Transient absorption results point to a sequential improvement in charge separation and stabilization from the macrocycle to the corresponding linear dimer and 2D polymer due to the unique design. Our macrocycle design with a supportive spatial arrangement of the donor and acceptor units will inspire the development of more complex synthetic systems with exciting electron-transfer and charge-separation features.

}, keywords = {Charge Separation, Donor-Acceptor Systems, Electron Transfer, Macrocycles, Perylene Bisimides}, issn = {1433-7851}, doi = {10.1002/anie.202212934}, author = {Dnyaneshwar Veer, Sairam and Chandrakant Wakchaure, Vivek and Asokan, Kiran and Dixit, Ruchi and Goswami, Tanmay and Saha, Ramchandra and Gonnade, Rajesh and Ghosh, Hirendra N. and Santhosh Babu, Sukumaran} } @article {48462, title = {Scalable optical fiber reactor for photocatalytic H2 production: addressing scattering issues}, journal = {International Journal of Hydrogen Energy}, volume = {48}, year = {2023}, month = {MAY}, pages = {17086-17096}, type = {Article}, abstract = {

Scattering is one of the main challenges in scaling up photocatalytic water splitting using the most prevalent powder catalysts. This can be overcome by decoupling the reaction medium from light transmission, as in the case of optical fibers. Here we explore utilizing optical fibers coated with 5 wt\% CuO supported on TiO2 for photocatlytic H2 production from water-methanol mixtures. CuO/TiO2 is a well studied photo catalyst in which photoreduced Cu species are known to act as sensitizers for inducing visible light activity. Lower activity of sequentially coated systems indicates that appropriate interfaces of active Cu and TiO2 with water are desirable. The scalability of such optical fiber-based systems along with potential in non-potable turbid water media are demonstrated. Maximum activity of 22 mmoles of H2 in 8 h was obtained with 50 mg of catalyst coated on optical fibers, which increases linearly with increase in fiber numbers, whereas, drastic reduction in activity is observed in powder catalyst upon increasing the catalyst quantity. A one-to-one comparison of 700 mg of catalyst in powder form and coated on optical fibers indicates more than one order enhancement in activity in the optical fiber based system. In addition, -70\% retention in activity in highly turbid non-potable water was observed as compared to powdered system which shows complete reduction in the activity by 99.99\%. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

}, keywords = {CuO, Optical fibers, photocatalytic water splitting, TiO2, Total internal reflection, Visible light utilisation}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2023.01.148}, author = {Walko, Priyanka S. and Devi, R. Nandini} } @article {48297, title = {Size does matter: antibacterial activities and cytotoxic evaluation of polymorphic CuO nanostructures}, journal = {Journal of Materials Science}, volume = {58}, year = {2023}, month = {FEB}, pages = {2782-2800}, type = {Article}, abstract = {

Nanostructured materials play a significant role in antibacterial activities. However, understanding the geometrical influence at the nanoscale in terms of size- and shape-correlated physical properties on antibacterial activities is very essential. Herein, we report the antibacterial influence of various copper oxide nanostructures (CuO NS) such as nanoparticles (NPs) (\< 10 nm), nanospheres (NSs) (50-100 nm), and porous nanoflowers (NFs) (asymptotic to 350 nm). The XRD confirmed the crystalline nature of CuO NPs without impurities. The antibacterial activities of CuO NPs were investigated by the microplate dilution method and confocal laser scanning microscopic (CLSM) imaging. NPs having a diameter less than 10 nm exhibited significant damage to the bacterial cell membrane than NSs and NFs. Interestingly, NPs illustrated relatively low antibacterial activity against Gram-negative bacteria (Pseudomonas aeruginosa and Acinetobacter baumannii) than Gram-positive bacteria (Staphylococcus aureus and Staphylococcus epidermidis). Acinetobacter baumannii was found to be more susceptible to the NPs than other bacterial strains, attributed to its increased membrane permeability. The death phase was observed at a concentration of 15.6 mu g mL(-1) and 3.9 mu g mL(-1) for P. aeruginosa and A. baumannii, respectively, when treated with CuO NP after the 8 h of incubation. Similarly, for S. aureus and S. epidermidis, the death phase was observed at the concentration of 31.2 mu g mL(-1) and 250 mu g mL(-1), respectively. Furthermore, as the cell cytotoxicity measurements against human fibroblast L9239 cells revealed that CuO NPs were safe. The morphological and cell viability assay demonstrated 100\% cell survival, when treated with NPs and NSs (5, 10, and 25 mu g mL(-1)), signifies no cytotoxicity. Therefore, CuO nanoparticles can be used for clinical and therapeutic applications.

}, issn = {0022-2461}, doi = {10.1007/s10853-023-08157-4}, author = {Desai, Dnyanada G. and Navale, Govinda R. and Late, Dattatray J. and Dharne, Mahesh S. and Walke, Pravin S.} } @article {48477, title = {Strategies and practical approaches for stable and high energy density sodium-ion battery: a step closer to commercialization}, journal = {Materials Today Sustainability}, volume = {22}, year = {2023}, month = {JUN}, pages = {100385}, type = {Article}, abstract = {

Sodium-ion batteries (SIBs) are reckoned as a potential alternative to Li-ion batteries (LIBs). Currently, the limited supply of precursors and the cost of LIBs have regenerated research and development interest in SIBs. Due to differences in the chemistry of lithium (Li) and sodium (Na), optimized methods for LIBs cannot be blindly applied to develop SIBs. Along with the judicial selection of electrode materials, electrolytes, and interfaces are very crucial for safe, high-power, and long-lasting batteries. The initial part of this review deals with the challenges faced in commercializing SIB full cells. Subsequently, the strategies to improve the energy density of SIB full cells through electrode modifications and electrolyte engineering are described in detail. This review comprehensively represents notable insights into the large-scale commercialization of potential sodium-ion batteries in the full cell.(c) 2023 Elsevier Ltd. All rights reserved.

}, keywords = {Cathode additives, Electrolyte additives, Na compensation, Self -sacri ficial salts, Sodium -ion battery}, issn = {2589-2347}, doi = {10.1016/j.mtsust.2023.100385}, author = {Yadav, P. and Patrike, A. and Wasnik, K. and Shelke, V. and Shelke, M.} } @article {48826, title = {Synthesis, biological evaluation and docking studies of silicon incorporated diarylpyrroles as MmpL3 inhibitors: an effective strategy towards development of potent anti-tubercular agents}, journal = {European Journal of Medicinal Chemistry}, volume = {259}, year = {2023}, month = {NOV }, pages = {115633}, type = {Article}, abstract = {

Growing global demand for new molecules to treat tuberculosis has created an urgent need to develop novel strategies to combat the menace. BM212 related compounds were found to be potent anti-TB agents and they inhibit mycolic acid transporter, MmpL3, a known potent drug target from Mycobacterium tuberculosis. In order to enhance their inhibitory potency, several silicon analogues of diarylpyrroles related to BM212 were designed, synthesized, and evaluated for anti-tubercular activities. In Alamar blue assay, most of the silicon-incorporated compounds were found to be more potent than the parent compound (BM212), against Mycobacterium tuberculosis (MIC = 1.7 \& mu;M, H37Rv). Docking results from the crystal structure of MmpL3 and silicon analogues as pharmacophore model also strongly correlate with the biological assays and suggest that the incorporation of silicon in the inhibitor scaffold could enhance their potency by stabilizing the hydrophobic residues at the binding pocket. The best docking hit, compound 12 showed an MIC of 0.1 \& mu;M against H37Rv with an acceptable in vitro ADME profile and excellent selectivity index. Overall, the present study indicates that, the designed silicon analogues, especially compound 12 could be a good inhibitor for an intrinsically flexible drug-binding pocket of MmpL3 and has potential for further development as anti-tubercular agents.

}, keywords = {antibiotic, BM212, docking studies, MmpL3 inhibitor, Silicon analogue, tuberculosis}, issn = {0223-5234}, doi = {10.1016/j.ejmech.2023.115633}, author = {Vasudevan, N. and Motiwala, Zenia and Ramesh, Remya and Wagh, Sachin B. and Shingare, Rahul D. and Katte, Revansiddha and Anand, Amitesh and Choudhary, Sushil and Kumar, Ajay and Gokhale, Rajesh S. and Kulkarni, Kiran A. and Reddy, D. Srinivasa} } @article {48269, title = {Unlike RNA-TBA (rTBA), iso-rTBA, the 2 {\textquoteleft}-5 {\textquoteleft}-linked RNA-thrombin-binding aptamer, is a functional equivalent of TBA}, journal = {Chemical Communications}, volume = {59}, year = {2023}, month = {FEB}, pages = {1461-1464}, type = {Article}, abstract = {

An antiparallel, functional RNA G-quadruplex of the 2 {\textquoteleft}-5 {\textquoteleft}-linked thrombin-binding aptamer (iso-rTBA) is reported for the first time. It can inhibit clotting and is remarkably stable to nuclease-degradation, besides having high thermal stability. It is thus, a superior candidate to TBA, rTBA or isoTBA, for further development as an anticoagulant.

}, issn = {1359-7345}, doi = {10.1039/d2cc05718b}, author = {Wagh, Atish A. A. and Kumar, Vaijayanti A. A. and Ravindranathan, Sapna and Fernandes, Moneesha} }