00747nas a2200169 4500008004100000022001400041245014200055210006900197260007100266300001400337490000800351100002000359700002100379700002800400700001700428856013200445 2006 eng d a0002-786300aHigh performance poly(styrene-b-diene-b-styrene) triblock copolymers from a hydrocarbon-soluble and additive-free dicarbanionic initiator0 aHigh performance polystyrenebdienebstyrene triblock copolymers f a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN a8158-81590 v1281 aMatmour, Rachid1 aMore, Arvind, S.1 aWadgaonkar, Prakash, P.1 aGnanou, Yves uhttps://library.ncl.res.in/content/high-performance-polystyrene-b-diene-b-styrene-triblock-copolymers-hydrocarbon-soluble-and-002073nas a2200205 4500008004100000022001400041245009400055210006900149260006800218300001400286490000800300520127700308653002401585653002501609100002901634700002101663700002801684700002701712856012801739 2007 eng d a0021-899500aSynthesis and characterization of new aromatic polyesters containing biphenyl side groups0 aSynthesis and characterization of new aromatic polyesters contai a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcDEC a3105-31100 v1063 a

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.

10aAromatic polyesters10abiphenyl side groups1 aHonkhambe, Pandurang, N.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P.1 aSalunkhe, Manikrao, M. uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-aromatic-polyesters-containing-biphenyl-side-groups-002240nas a2200241 4500008004100000022001400041245017200055210006900227260010600296300001400402490000700416520120000423653002801623653002301651653003801674653003001712100002401742700002201766700002701788700002801815700002801843856012701871 2007 eng d a0014-305700aSynthesis of aromatic poly(amide-imide)s from novel diimide-diacid (DIDA) containing sulphone and bulky pendant groups by direct polycondensation with various diamines0 aSynthesis of aromatic polyamideimides from novel diimidediacid D aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcDEC a5047-50540 v433 a

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'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.

10adirect polycondensation10apoly(amide-imide)s10asulphone and bulky pendant groups10athermally stable polymers1 aPatil, Prashant, S.1 aPal, Ravindra, R.1 aSalunkhe, Manikrao, M.1 aMaldar, Noormahamad, N.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-aromatic-polyamide-imides-novel-diimide-diacid-dida-containing-sulphone-and-002178nas a2200229 4500008004100000022001400041245013100055210006900186260008800255300001200343490000700355520127800362653001001640653002901650653002001679653002301699653001801722100002501740700002801765700002301793856013201816 2008 eng d a0352-513900aRapid liquid-liquid extraction of thallium(III) from succinate media with 2-octylaminopyirdine in chloroform as the extractant0 aRapid liquidliquid extraction of thalliumIII from succinate medi aKARNEGIJEVA 4, PO BOX 462, YU-11001 BELGRADE, YUGOSLAVIAbSERBIAN CHEMICAL SOCcJAN a435-4510 v733 a

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.

10a2-OAP10aliquid-liquid extraction10asuccinate media10aTemperature effect10athallium(III)1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/rapid-liquid-liquid-extraction-thalliumiii-succinate-media-2-octylaminopyirdine-chloroform-002670nas a2200241 4500008004100000022001400041245014200055210006900197260009900266300001400365490000700379520169300386653002402079653003102103653002502134653001802159100002102177700002502198700002802223700002302251700002302274856013102297 2008 eng d a0032-386100aSynthesis and self-assembling properties of alpha,omega-hydroxy-poly(ethylene oxide) end-capped with 1-isocyanato-3-pentadecylcyclohexane0 aSynthesis and selfassembling properties of alphaomegahydroxypoly aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcOCT a4635-46460 v493 a

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.

10aAssociating polymer10aHydrophobically end-capped10apoly(ethylene oxide)10aStar micelles1 aKadam, Vijay, S.1 aBadiger, Manohar, V.1 aWadgaonkar, Prakash, P.1 aDucouret, Guylaine1 aHourdet, Dominique uhttps://library.ncl.res.in/content/synthesis-and-self-assembling-properties-alphaomega-hydroxy-polyethylene-oxide-end-capped-002695nas a2200217 4500008004100000022001400041245018500055210006900240260006800309300001200377490000800389520178900397653003002186653001502216653002302231100001902254700002602273700002302299700002802322856012702350 2009 eng d a0021-899500aPolyimides based on aromatic diisocyanates containing pendent flexible alkoxy chains and aromatic dianhydrides: synthesis, characterization, and liquid-crystal alignment properties0 aPolyimides based on aromatic diisocyanates containing pendent fl a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcAPR a461-4720 v1123 a

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'-oxydiphthalic anhydride, 3,3',4,4'-(hexafluoroisopropylidene) diphthalic anhydride, and 3,3',4,4'-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',4, 4'-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'-oxydiphthalic anhydride. (c) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 461-472, 2009

10aHigh performance polymers10apolyimides10aThermal properties1 aSarkar, Anjana1 aHalhalli, Mahadeo, R.1 aKulkarni, Arun, D.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/polyimides-based-aromatic-diisocyanates-containing-pendent-flexible-alkoxy-chains-and-002232nas a2200229 4500008004100000022001400041245009000055210006900145260010600214300001200320490000700332520133100339653002801670653003301698653002901731653001501760100002801775700002601803700002101829700002801850856012401878 2009 eng d a0014-305700aSynthesis and characterization of new polyimides containing pendent pentadecyl chains0 aSynthesis and characterization of new polyimides containing pend aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcFEB a582-5890 v453 a

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',4,4'-biphenyltetracarboxylic dianhydride (BPDA), 3,3',4,4'-benzophenone-tetracarboxylic dianhydride (BTDA), 4,4'-oxydiphthalic anhydride (ODPA) and 4,4'-(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.

10aCashew nut shell liquid10aGlass transition temperature10aPendant pentadecyl chain10apolyimides1 aSadavarte, Nilakshi, V.1 aHalhalli, Mahadeo, R.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-polyimides-containing-pendent-pentadecyl-chains-002528nas a2200241 4500008004100000022001400041245018000055210006900235260010600304300001200410490000700422520148000429653004001909653002901949653003301978653001902011100002202030700002402052700002702076700002802103700002802131856012702159 2009 eng d a0014-305700aSynthesis, characterization and constitutional isomerism study of new aromatic polyamides containing pendant groups based on asymmetrically substituted meta-phenylene diamines0 aSynthesis characterization and constitutional isomerism study of aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR a953-9590 v453 a

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.

10aAsymmetrically substituted diamines10aConstitutional isomerism10ainterfacial polycondensation10aPendant groups1 aPal, Ravindra, R.1 aPatil, Prashant, S.1 aSalunkhe, Manikrao, M.1 aMaldar, Noormahamad, N.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-characterization-and-constitutional-isomerism-study-new-aromatic-polyamides-002613nas a2200229 4500008004100000022001400041245011300055210006900168260006800237300001400305490000700319520173200326653001602058653004902074653001302123653002702136100002202163700002802185700002102213700002502234856012402259 2010 eng d a0887-626600aHydrophobically modified poly(vinyl alcohol) using alkoxy-substituted methyl gallate: synthesis and rheology0 aHydrophobically modified polyvinyl alcohol using alkoxysubstitut a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcMAY a1054-10630 v483 a

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

10agallic acid10ahydrophobically modified poly(vinyl alcohol)10aRheology10awater-soluble polymers1 aShedge, Aarti, S.1 aWadgaonkar, Prakash, P.1 aLele, Ashish, K.1 aBadiger, Manohar, V. uhttps://library.ncl.res.in/content/hydrophobically-modified-polyvinyl-alcohol-using-alkoxy-substituted-methyl-gallate-002237nas a2200217 4500008004100000022001400041245013900055210006900194260007000263300001400333490000700347520137400354653001001728653001701738653002901755653003701784100002501821700002801846700002301874856012201897 2010 eng d a0352-513900aLiquid-liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: analysis of bauxite ore0 aLiquidliquid extraction and recovery of galliumIII from acid med aKARNEGIJEVA 4, 11 120 BELGRADE, SERBIAbSERBIAN CHEMICAL SOCcApr a1099-11130 v753 a

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'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.

10a2-OAP10agallium(III)10aliquid-liquid extraction10arecovery of gallium from bauxite1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/liquid-liquid-extraction-and-recovery-galliumiii-acid-media-2-octylaminopyridine-002099nas a2200217 4500008004100000022001400041245009400055210006900149260007300218300001200291490000700303520124600310653004801556653002101604653002401625653003001649100003001679700002201709700002801731856012201759 2010 eng d a1381-514800aNew ATRP initiator for synthesis of cyclic carbonate-terminated poly(methyl methacrylate)0 aNew ATRP initiator for synthesis of cyclic carbonateterminated p aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC a931-9370 v703 a

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',N',N''N''-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.

10aAtom transfer radical polymerization (ATRP)10acyclic carbonate10afunctional polymers10apoly(methyl methacrylate)1 aPalaskar, Dnyaneshwar, V.1 aSane, Prakash, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-atrp-initiator-synthesis-cyclic-carbonate-terminated-polymethyl-methacrylate-002992nas a2200241 4500008004100000022001400041245009100055210006900146260009900215300001200314490000700326520209300333653001302426653002802439653002202467653001902489653002202508653002202530100002102552700002402573700002802597856012502625 2010 eng d a0141-391000aPoly(amideimide)s containing pendant pentadecyl chains: synthesis and characterization0 aPolyamideimides containing pendant pentadecyl chains synthesis a aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcMAY a837-8440 v953 a

A new aromatic diacylhydrazide monomer viz., 4-[4'-(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'-(hydrazinocarbonyl)phenoxy]-2-pentade-cylbenzohydrazide and commercially available aromatic dianhydrides, viz., benzene-1,2,4,5-tetracarboxylic dianhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride, benzophenone-3,3',4,4'-tetracarboxylic dianhydride, 4,4'-oxydiphthalic anhydride and 4,4'-(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.

10aCardanol10aCashew nut shell liquid10aPentadecyl chains10aPlasticization10aPoly(amideimide)s10athermal stability1 aMore, Arvind, S.1 aPatil, Anandrao, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/polyamideimides-containing-pendant-pentadecyl-chains-synthesis-and-characterization-003424nas a2200241 4500008004100000022001400041245011300055210006900168260010600237300001400343490000700357520245500364653003302819653002902852653002202881653002802903653002202931100002802953700002102981700002203002700002803024856013003052 2010 eng d a0014-305700aRegularly alternating poly(amideimide)s containing pendent pentadecyl chains: synthesis and characterization0 aRegularly alternating polyamideimides containing pendent pentade aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUN a1307-13150 v463 a

Two new aromatic diamines containing preformed amide linkages, viz., N,N'-(4-pentadecyl-1,3-phenylene)bis(4-aminobenzamide) I and N,N'-(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'-biphenyltetracarboxylic dianhydride (BPDA), 4,4'-oxydiphthalic anhydride (ODPA), and 4,4'-(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'-(1,3-phenylene)bis(4-aminobenzamide) and N,N'-(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 ``internal plasticization'' 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.

10aGlass transition temperature10aPendent pentadecyl chain10aPoly(amideimide)s10aPreformed amide linkage10athermal stability1 aSadavarte, Nilakshi, V.1 aAvadhani, C., V.1 aNaik, Parimal, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/regularly-alternating-polyamideimides-containing-pendent-pentadecyl-chains-synthesis-and-002713nas a2200265 4500008004100000022001400041245009700055210006900152260009900221300001400320490000700334520176400341653002802105653000902133653001502142653002002157653001402177653001502191653001502206100002102221700002202242700002402264700002802288856013102316 2010 eng d a0141-391000aSynthesis and characterization of aromatic polyazomethines bearing pendant pentadecyl chains0 aSynthesis and characterization of aromatic polyazomethines beari aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcSEP a1727-17350 v953 a

Aromatic diamine monomer viz., 4-(4'-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'-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 ``internal plasticization'' 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.

10aCashew nut shell liquid10aCNSL10apentadecyl10apolyazomethines10arenewable10aSide-chain10asolubility1 aMore, Arvind, S.1 aSane, Prakash, S.1 aPatil, Anandrao, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-aromatic-polyazomethines-bearing-pendant-pentadecyl-chains-002403nas a2200241 4500008004100000022001400041245009600055210006900151260006800220300001400288490000800302520148600310653002401796653001401820653003301834653002701867100002901894700002301923700003001946700002801976700002702004856013002031 2010 eng d a0021-899500aSynthesis and characterization of new aromatic polyesters containing pendent naphthyl units0 aSynthesis and characterization of new aromatic polyesters contai a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcSEP a2545-25520 v1173 a

Two bisphenols, viz., 4,4'-[1-(2-naphthaleny-1)ethylidene]bisphenol and 4,4'-[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

10aAromatic polyesters10abisphenol10ainterfacial polycondensation10apendent naphthyl units1 aHonkhambe, Pandurang, N.1 aBiyani, Mahesh, V.1 aBhairamadgi, Nagendra, S.1 aWadgaonkar, Prakash, P.1 aSalunkhe, Manikrao, M. uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-aromatic-polyesters-containing-pendent-naphthyl-units-002423nas a2200253 4500008004100000022001400041245010700055210006900162260010600231300001200337490000700349520146400356653001401820653001001834653002501844653001401869653003601883100002901919700003001948700002301978700002802001700002702029856011302056 2010 eng d a0014-305700aSynthesis and characterization of new aromatic polyesters containing cardo decahydronaphthalene groups0 aSynthesis and characterization of new aromatic polyesters contai aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAPR a709-7180 v463 a

Three cardo bisphenols containing decahydronaphthalene group viz., 4,4'-(octahydro-2(1H)-naphthylidene)bisphenol, 4,4'-(octahydro-2(1H)-naphthylidene)bis-3-methylphenol and 4,4'-(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.

10abisphenol10aCardo10aDecahydronaphthalene10apolyester10aStructure-property relationship1 aHonkhambe, Pandurang, N.1 aBhairamadgi, Nagendra, S.1 aBiyani, Mahesh, V.1 aWadgaonkar, Prakash, P.1 aSalunkhe, Manikrao, M. uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-aromatic-polyesters-containing-cardo-002596nas a2200229 4500008004100000022001400041245008600055210006900141260010600210300001200316490000700328520174000335653002102075653001302096653002802109653002202137653001502159100002102174700002302195700002802218856012002246 2010 eng d a0014-305700aSynthesis and characterization of polyamides containing pendant pentadecyl chains0 aSynthesis and characterization of polyamides containing pendant  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR a557-5670 v463 a

A new aromatic diacid monomer viz., 4-(4'-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'-carboxyphenoxy)-2-pentadecylbenzoic acid with five commercially available aromatic diamines viz., 1,4-phenylenediamine, 4,4'-oxydianiline, 4,4'-methylenedianiline, 1,3-phenylenediamine, and 4,4'-(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.

10aalkyl side-chain10aCardanol10aCashew nut shell liquid10aPentadecyl chains10apolyamides1 aMore, Arvind, S.1 aPasale, Sharad, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyamides-containing-pendant-pentadecyl-chains-002813nas a2200241 4500008004100000022001400041245011400055210006900169260009800238300001400336490000700350520192500357653002702282653000902309653001502318653001502333653001402348100002102362700002202383700002402405700002802429856011402457 2010 eng d a0959-810300aSynthesis and characterization of polyesters based on 1,1,1-[bis(4-hydroxyphenyl)-4 `-pentadecylphenyl]ethane0 aSynthesis and characterization of polyesters based on 111bis4hyd aTHE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLANDbJOHN WILEY & SONS LTDcOCT a1408-14140 v593 a

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'-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'-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'-isopropylidenediphenol with TPC by incorporating 1,1,1-[bis(4-hydroxyphenyl)-4'-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

10acashew nutshell liquid10aCNSL10apentadecyl10apolyesters10arenewable1 aMore, Arvind, S.1 aNaik, Parimal, V.1 aKumbhar, Kishor, P.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyesters-based-111-bis4-hydroxyphenyl-4-001613nas a2200289 4500008004100000022001400041245009500055210006900150260007600219300001200295490000700307520063500314653001700949653001600966653001700982653001900999653002101018100001701039700001401056700001701070700002501087700002801112700002201140700002101162700001901183856012101202 2011 eng d a1022-133600aElectrochemical fluorescence switching from a patternable poly(1,3,4-oxadiazole) thin film0 aElectrochemical fluorescence switching from a patternable poly13 aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAPR a637-6430 v323 a

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.

10afluorescence10alithography10aLuminescence10aphotochemistry10aswitching device1 aSeo, Seogjae1 aKim, Yuna1 aYou, Jungmok1 aSarwade, Bhimrao, D.1 aWadgaonkar, Prakash, P.1 aMenon, Shamal, K.1 aMore, Arvind, S.1 aKim, Eunkyoung uhttps://library.ncl.res.in/content/electrochemical-fluorescence-switching-patternable-poly134-oxadiazole-thin-film-002173nas a2200253 4500008004100000022001400041245004500055210004500100260007400145300001200219490000700231520139000238653001501628653001601643653001501659653002301674653000801697100002501705700002501730700002601755700002801781700002801809856008201837 2011 eng d a1022-976000aPolyamides containing quinoxaline moiety0 aPolyamides containing quinoxaline moiety aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJUL a549-5570 v183 a

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'-oxybis(benzoicacid), isophthalic acid and terephthalic acid with APQ by Yamazaki'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.

10apolyamides10aQuinoxaline10asolubility10aThermal properties10aXRD1 aPatil, Vidyadhar, B.1 aSayyed, Maheboob, M.1 aMahanwar, Prakash, A.1 aWadgaonkar, Prakash, P.1 aMaldar, Noormahamad, N. uhttps://library.ncl.res.in/content/polyamides-containing-quinoxaline-moiety-002698nas a2200277 4500008004100000022001400041245014400055210006900199260007600268300001400344490000800358520162000366653001401986653003102000653003702031653003002068653002102098653002302119100002902142700002302171700003002194700002402224700002702248700002802275856011702303 2011 eng d a0021-899500aPoly(ether ether ketone)s and poly(ether ether ketone ketone)s containing cardo decahydronaphthalene groups: synthesis and characterization0 aPolyether ether ketones and polyether ether ketone ketones conta aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcNOV a1607-16130 v1223 a

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'-(octahydro-2(1H)-naphthylidene) bisphenol, 4,4'-(octa-hydro-2(1H)-naphthylidene) bis-3-methylphenol, and 4,4'(octahydro-2(1H)-naphthylidene) bis-3,5-dimethylphenol with 4,4'-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

10abisphenol10acardo decahydronaphthalene10apoly(ether ether ketone ketone)s10apoly(ether ether ketone)s10aPolycondensation10aThermal properties1 aHonkhambe, Pandurang, N.1 aPasale, Sharad, K.1 aBhairamadgi, Nagendra, S.1 aKumbhar, Kishor, P.1 aSalunkhe, Manikrao, M.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/polyether-ether-ketones-and-polyether-ether-ketone-ketones-containing-cardo-003033nas a2200229 4500008004100000022001400041245013300055210006900188260008700257300001200344490000700356520213200363653003002495653002102525653001502546653002002561653001502581100002802596700002102624700002802645856013002673 2011 eng d a0954-008300aSynthesis and characterization of new organosoluble aromatic polyamides and polyazomethines containing pendent pentadecyl chains0 aSynthesis and characterization of new organosoluble aromatic pol a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcNOV a494-5050 v233 a

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'dicarboxylic acid, 4,4'-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.

10aHigh performance polymers10aoptical band gap10apolyamides10apolyazomethines10asolubility1 aSadavarte, Nilakshi, V.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-new-organosoluble-aromatic-polyamides-and-polyazomethines-002867nas a2200277 4500008004100000022001400041245015300055210006900208260006700277300001400344490000800358520184000366653002102206653002802227653000902255653001502264653002502279653002402304653001502328653001402343100002102357700002302378700002902401700002802430856013102458 2011 eng d a0021-899500aSynthesis and characterization of organo-soluble poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing pendant pentadecyl chains0 aSynthesis and characterization of organosoluble polyether ether  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcSEP a3689-36950 v1213 a

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'-pentadecylphenyl] ethane and 1,1-bis(4-hydroxyphenyl)-3-pentadecyl cyclohexane with activated aromatic dihalides namely, 4,4'-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 ``internal plasticization'' effect of flexible pendant pentadecyl chains. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 3689-3695, 2011

10aalkyl side-chain10aCashew nut shell liquid10aCNSL10apentadecyl10apoly(arylene ether)s10apoly(ether ketone)s10apolyethers10arenewable1 aMore, Arvind, S.1 aPasale, Sharad, K.1 aHonkhambe, Pandurang, N.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-organo-soluble-polyether-ether-ketones-and-polyether-ether-002104nas a2200229 4500008004100000022001400041245012900055210006900184260010600253300001400359490000700373520114500380653003601525653004801561653001801609653003101627653001601658100002201674700003001696700002801726856012001754 2011 eng d a0014-305700aSynthesis of bis-allyloxy functionalized polystyrene and poly (methyl methacrylate) macromonomers using a new ATRP initiator0 aSynthesis of bisallyloxy functionalized polystyrene and poly met aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcAUG a1621-16290 v473 a

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',N',N `'-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.

10aAllyloxy end-functional polymer10aAtom transfer radical polymerization (ATRP)10aMacromonomers10aPoly (methyl methacrylate)10aPolystyrene1 aSane, Prakash, S.1 aPalaskar, Dnyaneshwar, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-bis-allyloxy-functionalized-polystyrene-and-poly-methyl-methacrylate-002108nas a2200253 4500008004100000022001400041245015000055210006900205260007300274300001200347490000700359520113700366653003801503653000901541653002101550653001601571653000801587100002201595700002601617700003001643700002201673700002801695856013101723 2012 eng d a1381-514800aAromatic aldehyde functionalized polycaprolactone and polystyrene macromonomers: synthesis, characterization and aldehyde-aminooxy click reaction0 aAromatic aldehyde functionalized polycaprolactone and polystyren aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT a713-7210 v723 a

New bis-aldehyde functionalized initiators, viz, 4,4'-(4,4'-(5-hydroxypentane-2,2-diyl)bis(4,1-phenylene))bis(oxy)dibenza ldehyde (1) and 4,4'-bis(4-(4-(formylphenoxy) phenyl) pentyl 2-bromopropanoate (2) were synthesized starting from commercially available 4,4'-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.

10aAldehyde-terminated macromonomers10aATRP10aPolycaprolactone10aPolystyrene10aROP1 aSane, Prakash, S.1 aTawade, Bhausaheb, V.1 aPalaskar, Dnyaneshwar, V.1 aMenon, Shamal, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/aromatic-aldehyde-functionalized-polycaprolactone-and-polystyrene-macromonomers-synthesis-002810nas a2200253 4500008004100000022001400041245009500055210006900150260007600219300001400295490000800309520192100317653000602238653001902244653002802263653001502291653001102306653001902317653002202336100002102358700002202379700002802401856012702429 2012 eng d a0021-899500aNew poly(1,3,4-oxadiazole)s bearing pentadecyl side chains: synthesis and characterization0 aNew poly134oxadiazoles bearing pentadecyl side chains synthesis  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAPR a1281-12890 v1243 a

The 4-[4'-(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

10a310a4-oxadiazole)s10aCashew nut shell liquid10apentadecyl10apoly(110apolyhydrazides10athermal stability1 aMore, Arvind, S.1 aMenon, Shamal, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-poly134-oxadiazoles-bearing-pentadecyl-side-chains-synthesis-and-characterization-001872nas a2200241 4500008004100000022001400041245015100055210006900206260007600275300001400351490000800365520090000373653002401273653002201297653004901319100002401368700002101392700002201413700001801435700002801453700002701481856012201508 2012 eng d a0021-899500aSynthesis, spectroscopy, and electrochemical investigation of new conjugated polymers containing thiophene and 1,3,4-thiadiazole in the main chain0 aSynthesis spectroscopy and electrochemical investigation of new  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAUG a1882-18890 v1253 a

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

10aconjugated polymers10aphotoluminescence10athiophene and thiadiazole-containing polymer1 aPatil, Prashant, S.1 aHaram, Nanda, S.1 aPal, Ravindra, R.1 aPeriasamy, N.1 aWadgaonkar, Prakash, P.1 aSalunkhe, Manikrao, M. uhttps://library.ncl.res.in/content/synthesis-spectroscopy-and-electrochemical-investigation-new-conjugated-polymers-002584nas a2200217 4500008004100000022001400041245013200055210006900187260008700256300001200343490000700355520170600362653004002068653001102108653002402119653001502143100002302158700002602181700002802207856013102235 2013 eng d a0954-008300aCyanate ester resins containing pentadecyl-substituted cyclohexyl moiety: synthesis, curing and structure-property relationship0 aCyanate ester resins containing pentadecylsubstituted cyclohexyl a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcMAY a278-2860 v253 a

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.

10a(pentadecyl substituted) cyclohexyl10acuring10acyanate ester resin10athermosets1 aKulkarni, Arun, D.1 aTawade, Bhausaheb, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/cyanate-ester-resins-containing-pentadecyl-substituted-cyclohexyl-moiety-synthesis-curing-001663nas a2200253 4500008004100000022001400041245015600055210006900211260010300280300001200383490000700395520063000402653002501032653004301057653001701100653002901117653001901146100002701165700002201192700002001214700001801234700002801252856012901280 2013 eng d a1631-074800aDiethylamine: a smart organocatalyst in eco-safe and diastereoselective synthesis of medicinally privileged 2-amino-4H-chromenes at ambient temperature0 aDiethylamine a smart organocatalyst in ecosafe and diastereosele a23 RUE LINOIS, 75724 PARIS, FRANCEbELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIERcAUG a689-6950 v163 a

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 ``near-ideal synthesis''. (c) 2013 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

10a2-amino-4H-chromenes10aActive methylene compounds (C-H acids)10adiethylamine10amulticomponent reactions10aorganocatalyst1 aKulkarni, Makarand, A.1 aPandit, Kapil, S.1 aDesai, Uday, V.1 aLad, Uday, P.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/diethylamine-smart-organocatalyst-eco-safe-and-diastereoselective-synthesis-medicinally-002234nas a2200253 4500008004100000022001400041245021300055210006900268260006700337300001400404490000700418520117300425653004101598653002001639653002401659653003201683100002201715700002601737700002301763700001901786700002101805700002801826856012601854 2013 eng d a0887-624X00aFacile strategy for synthesis of ,-heterobifunctionalized poly (epsilon-caprolactones) and poly (methyl methacrylate)s containing ``clickable'' aldehyde and allyloxy functional groups using initiator approach0 aFacile strategy for synthesis of heterobifunctionalized poly eps a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcMAY a2091-21030 v513 a

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

10aatom transfer radical polymerization10aClick chemistry10afunctional polymers10aring opening polymerization1 aSane, Prakash, S.1 aTawade, Bhausaheb, V.1 aParmar, Indravadan1 aKumari, Savita1 aNagane, Samadhan1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/facile-strategy-synthesis-heterobifunctionalized-poly-epsilon-caprolactones-and-poly-001464nas a2200241 4500008004100000022001400041245013600055210006900191260010300260300001200363490000700375520049700382653003100879653002300910653002400933653001700957100002700974700001801001700002001019700002701039700002801066856012801094 2013 eng d a1631-074800aMechanistic approach for expeditious and solvent-free synthesis of alpha-hydroxy phosphonates using potassium phosphate as catalyst0 aMechanistic approach for expeditious and solventfree synthesis o a23 RUE LINOIS, 75724 PARIS, FRANCEbELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIERcFEB a148-1520 v163 a

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.

10aalpha-hydroxy phosphonates10aHydrophosphylation10aPotassium phosphate10aSolvent-free1 aKulkarni, Makarand, A.1 aLad, Uday, P.1 aDesai, Uday, V.1 aMitragotri, Satish, D.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/mechanistic-approach-expeditious-and-solvent-free-synthesis-alpha-hydroxy-phosphonates-002333nas a2200241 4500008004100000022001400041245011800055210006900173260008700242300001200329490000700341520139100348653003001739653002101769653001401790653002601804653003101830100002801861700002201889700002101911700002801932856013101960 2013 eng d a0954-008300aNew organosoluble aromatic poly(esterimide)s containing pendent pentadecyl chains: synthesis and characterization0 aNew organosoluble aromatic polyesterimides containing pendent pe a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcNOV a735-7430 v253 a

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.

10apendent pentadecyl chains10aPolycondensation10aPolyimide10aPreformed imide rings10aThermogravimetric analysis1 aSadavarte, Nilakshi, V.1 aPatil, Sachin, S.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-organosoluble-aromatic-polyesterimides-containing-pendent-pentadecyl-chains-synthesis-002286nas a2200277 4500008004100000022001400041245015000055210006900205260008700274300001200361490000700373520120900380653001301589653001401602653001301616653003701629653003001666653002101696653002301717100002901740700002601769700002601795700002701821700002801848856013201876 2013 eng d a0954-008300aSynthesis and characterization of poly(ether ether ketone)s and poly(ether ether ketone ketone) s containing pendant biphenyl and naphthyl groups0 aSynthesis and characterization of polyether ether ketones and po a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcMAY a260-2670 v253 a

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'-[1-(2- naphthalenyl) ethylidene] bis-phenol and 4,4'-[1-(2- naphthalenyl) ethylidene] bis-3-methylphenol with 4,4'- 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.

10abiphenyl10abisphenol10anaphthyl10apoly(ether ether ketone ketone)s10apoly(ether ether ketone)s10aPolycondensation10aThermal properties1 aHonkhambe, Pandurang, N.1 aDhamdhere, Neelam, A.1 aTawade, Bhausaheb, V.1 aSalunkhe, Manikrao, M.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyether-ether-ketones-and-polyether-ether-ketone-ketone-s-002338nas a2200229 4500008004100000022001400041245016100055210006900216260009900285300001400384490000700398520140000405653002401805653001901829653002001848100002301868700002301891700001901914700002501933700002801958856012201986 2013 eng d a0032-386100aThermodynamic behavior of hydrophobically modified polyacrylamide containing random distribution of hydrophobes: experimental and theoretical investigations0 aThermodynamic behavior of hydrophobically modified polyacrylamid aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcMAY a2676-26890 v543 a

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.

10aAssociating polymer10aPolyacrylamide10aSelf-assembling1 aHourdet, Dominique1 aDucouret, Guylaine1 aVarghese, Sony1 aBadiger, Manohar, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/thermodynamic-behavior-hydrophobically-modified-polyacrylamide-containing-random-001955nas a2200265 4500008004100000022001400041245010300055210006900158260007700227300001000304490000800314520100800322653001701330653001301347653002901360653001401389653001401403100002701417700001901444700002801463700002501491700002801516700002001544856012501564 2013 eng d a1022-136000aThermoresponsive and biodegradable dextran based microgels: synthesis and structural investigation0 aThermoresponsive and biodegradable dextran based microgels synth aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL a27-340 v3293 a

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.

10aBiomaterials10acolloids10adynamic light scattering10ahydrogels10ap(NiPAAm)1 aGhugare, Shivkumar, V.1 aChiessi, Ester1 aSakai, Victoria, Garcia1 aTelling, Mark, T. F.1 aWadgaonkar, Prakash, P.1 aParadossi, Gaio uhttps://library.ncl.res.in/content/thermoresponsive-and-biodegradable-dextran-based-microgels-synthesis-and-structural-001390nas a2200193 4500008004100000022001400041245018500055210006900240260011000309300001600419490000600435520051000441100002300951700002200974700002000996700002701016700002801043856012501071 2014 eng d a2046-206900aCellulose 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 water0 aCellulose supported cuprous iodide nanoparticles CellCuI NPs a n aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP a42137-421460 v43 a

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.

1 aChavan, Pramod, V.1 aPandit, Kapil, S.1 aDesai, Uday, V.1 aKulkarni, Makarand, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/cellulose-supported-cuprous-iodide-nanoparticles-cell-cui-nps-new-heterogeneous-and-002203nas a2200169 4500008004100000022001400041245008600055210006900141260011000210300001600320490000600336520150700342100002201849700002801871700002201899856011201921 2014 eng d a2050-748800aFluorescent polymeric ionic liquids for the detection of nitroaromatic explosives0 aFluorescent polymeric ionic liquids for the detection of nitroar aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a13983-139890 v23 a

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.

1 aShaligram, Sayali1 aWadgaonkar, Prakash, P.1 aKharul, Ulhas, K. uhttps://library.ncl.res.in/content/fluorescent-polymeric-ionic-liquids-detection-nitroaromatic-explosives-001366nas a2200205 4500008004100000022001400041245007500055210006900130260011000199300001400309490000600323520057900329100001900908700002100927700002800948700002600976700002201002700002801024856010801052 2014 eng d a1759-995400aFunctionalization of cardanol: towards biobased polymers and additives0 aFunctionalization of cardanol towards biobased polymers and addi aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcOCT a3142-31620 v53 a

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.

1 aVoirin, Coline1 aCaillol, Sylvain1 aSadavarte, Nilakshi, V.1 aTawade, Bhausaheb, V.1 aBoutevin, Bernard1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/functionalization-cardanol-towards-biobased-polymers-and-additives-002073nas a2200169 4500008004100000022001400041245009600055210006900151260011000220300001600330490000700346520132300353100004301676700002801719700003101747856012501778 2014 eng d a1463-907600aLinearly polarized emission from self-assembled microstructures of mesogenic polythiophenes0 aLinearly polarized emission from selfassembled microstructures o aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP a23809-238180 v163 a

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).

1 aAnanthakrishnan, Soundaram, Jeevarathi1 aWadgaonkar, Prakash, P.1 aSomanathan, Narayanasastri uhttps://library.ncl.res.in/content/linearly-polarized-emission-self-assembled-microstructures-mesogenic-polythiophenes-001351nas a2200193 4500008004100000022001400041245016800055210006900223260011000292300001600402490000600418520048800424100002500912700002000937700002200957700002700979700002801006856012301034 2014 eng d a2046-206900aNickel ferrite nanoparticles-hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides0 aNickel ferrite nanoparticleshydrogen peroxide a green catalystox aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a36702-367070 v43 a

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.

1 aKulkarni, Aparna, M.1 aDesai, Uday, V.1 aPandit, Kapil, S.1 aKulkarni, Makarand, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/nickel-ferrite-nanoparticles-hydrogen-peroxide-green-catalyst-oxidant-combination-002168nas a2200253 4500008004100000022001400041245012400055210006900179260007400248300000800322490000700330520121400337653002401551653002801575653001501603653002101618653001901639653002301658100002601681700002601707700002201733700002801755856013101783 2014 eng d a1022-976000aProcessable aromatic polyesters based on bisphenol derived from cashew nut shell liquid: synthesis and characterization0 aProcessable aromatic polyesters based on bisphenol derived from  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcNOV a6170 v213 a

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.

10aAromatic polyesters10aCashew nut shell liquid10apentadecyl10aPolycondensation10aprocessability10aThermal properties1 aTawade, Bhausaheb, V.1 aSalunke, Jagadish, K.1 aSane, Prakash, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/processable-aromatic-polyesters-based-bisphenol-derived-cashew-nut-shell-liquid-synthesis-001509nas a2200205 4500008004100000022001400041245010100055210006900156260011000225300001600335490000700351520069400358100002601052700002001078700001701098700001901115700001601134700002801150856012501178 2014 eng d a1463-907600aPyrene based conjugated materials: synthesis, characterization and electroluminescent properties0 aPyrene based conjugated materials synthesis characterization and aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV a23320-233280 v163 a

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.

1 aSalunke, Jagadish, K.1 aSonar, Prashant1 aWong, F., L.1 aRoy, V., A. L.1 aLee, C., S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/pyrene-based-conjugated-materials-synthesis-characterization-and-electroluminescent-001472nas a2200265 4500008004100000022001400041245015100055210006900206260009200275300001200367490000600379520044600385653002200831653001700853653002000870653002900890653001900919653001500938100002000953700002700973700002201000700002501022700002801047856013101075 2014 eng d a1751-825300aSimple, economical, and environmentally benign protocol for the synthesis of 2-amino-3,5-dicarbonitrile-6-sulfanylpyridines at ambient temperature0 aSimple economical and environmentally benign protocol for the sy a4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLANDbTAYLOR & FRANCIS LTDcJUN a228-2350 v73 a

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 ``green synthesis.''

10a5-dicarbonitriles10adiethylamine10agreen chemistry10amulticomponent reactions10aorganocatalyst10apyridine-31 aDesai, Uday, V.1 aKulkarni, Makarand, A.1 aPandit, Kapil, S.1 aKulkarni, Aparna, M.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/simple-economical-and-environmentally-benign-protocol-synthesis-2-amino-35-dicarbonitrile-601331nas a2200193 4500008004100000022001400041245011700055210006900172260011000241300001600351490000600367520051600373100002500889700002200914700002300936700002000959700002800979856013001007 2015 eng d a2046-206900aCobalt ferrite nanoparticles: a magnetically separable and reusable catalyst for Petasis-Borono-Mannich reaction0 aCobalt ferrite nanoparticles a magnetically separable and reusab aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAUG a70586-705940 v53 a

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's activity are the noteworthy features of the developed protocol.

1 aKulkarni, Aparna, M.1 aPandit, Kapil, S.1 aChavan, Pramod, V.1 aDesai, Uday, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/cobalt-ferrite-nanoparticles-magnetically-separable-and-reusable-catalyst-petasis-borono-000800nas a2200193 4500008004100000245016600041210006900207260000800276300001200284490000600296100002200302700002700324700002300351700002000374700002400394700002800418700002900446856013100475 2015 eng d00aHigh surface area porous carbon for ultracapacitor application by pyrolysis of polystyrene containing pendant carboxylic acid groups prepared via click chemistry0 aHigh surface area porous carbon for ultracapacitor application b cSEP a166-1750 v41 aChhatre, Shraddha1 aAravindan, Vanchiappan1 aPuthusseri, Dhanya1 aBanerjee, Abhik1 aMadhavi, Srinivasan1 aWadgaonkar, Prakash, P.1 aOgale, Satishchandra, B. uhttps://library.ncl.res.in/content/high-surface-area-porous-carbon-ultracapacitor-application-pyrolysis-polystyrene-containing02410nas a2200229 4500008004100000022001400041245015500055210006900210260006700279300001200346490000700358520145600365653004101821653004401862653002501906653002001931653002901951100002201980700002202002700002802024856012802052 2015 eng d a0959-810300aNew atom transfer radical polymerization initiator based on phenolphthalein for the synthesis of bis-allyloxy functionalized polystyrene macromonomers0 aNew atom transfer radical polymerization initiator based on phen a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcMAR a413-4200 v643 a

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

10aatom transfer radical polymerization10abis-allyloxy functionalized polystyrene10afunctional initiator10aphenolphthalein10athiol-ene click reaction1 aPatil, Sachin, S.1 aMenon, Shamal, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-atom-transfer-radical-polymerization-initiator-based-phenolphthalein-synthesis-bis-001278nas a2200217 4500008004100000022001400041245013000055210006900185260010600254300001200360490000700372520038800379653002100767653002600788653002400814653002600838100002300864700002100887700002800908856012400936 2015 eng d a0014-305700aNew poly(ether urethane)s based on lignin derived aromatic chemicals via A-B monomer approach: synthesis and characterization0 aNew polyether urethanes based on lignin derived aromatic chemica aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcOCT a547-5570 v713 a

{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

10aA-B type monomer10aPoly(ether urethane)s10aRenewable resources10aSelf-polycondensation1 aKuhire, Sachin, S.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-polyether-urethanes-based-lignin-derived-aromatic-chemicals-b-monomer-approach-001994nas a2200169 4500008004100000022001400041245012500055210006900180260000900249300001200258490000800270520134100278100002601619700002801645700002201673856012901695 2015 eng d a0376-738800aPolybenzimidazole-based polymeric ionic liquids (PILs): effects of `substitution asymmetry' on CO2 permeation properties0 aPolybenzimidazolebased polymeric ionic liquids PILs effects of s cNOV  a403-4130 v4933 a

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 `reverse selectivity'. 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.

1 aShaligram, Sayali, V.1 aWadgaonkar, Prakash, P.1 aKharul, Ulhas, K. uhttps://library.ncl.res.in/content/polybenzimidazole-based-polymeric-ionic-liquids-pils-effects-substitution-asymmetry-co2-002489nas a2200301 4500008004100000022001400041245013200055210006900187260009900256300001200355490000800367520135800375653002301733653002701756653001401783653001301797653002201810653003201832100002201864700002401886700002801910700002401938700002301962700002301985700002302008700002502031856013102056 2015 eng d a0144-861700aSynthesis and characterization of PEPO grafted carboxymethyl guar and carboxymethyl tamarind as new thermo-associating polymers0 aSynthesis and characterization of PEPO grafted carboxymethyl gua aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcMAR a331-3380 v1173 a

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'; loss modulus, G'') 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 ``Salting out'' and ``Salting in'' 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.

10aCarboxymethyl guar10aCarboxymethyl tamarind10aPluronics10aRheology10aSolution behavior10aThermo-associating polymers1 aGupta, Nivika, R.1 aTorris, Arun, A. T.1 aWadgaonkar, Prakash, P.1 aRajamohanan, P., R.1 aDucouret, Guylaine1 aHourdet, Dominique1 aCreton, Costantino1 aBadiger, Manohar, V. uhttps://library.ncl.res.in/content/synthesis-and-characterization-pepo-grafted-carboxymethyl-guar-and-carboxymethyl-tamarind-102843nas a2200229 4500008004100000022001400041245011900055210006900174260006700243300001400310490000700324520199800331653000902329653001802338653001502356653001902371653001902390100002602409700002302435700002802458856012702486 2015 eng d a0959-810300aSynthesis and characterization of polyetherimides containing multiple ether linkages and pendent pentadecyl chains0 aSynthesis and characterization of polyetherimides containing mul a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcDEC a1770-17780 v643 a

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' 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

10aCNSL10aether linkage10apentadecyl10apolyetherimide10aprocessability1 aTawade, Bhausaheb, V.1 aKulkarni, Arun, D.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyetherimides-containing-multiple-ether-linkages-and-001497nas a2200193 4500008004100000022001400041245018800055210006900243260011000312300001400422490000700436520060900443100002201052700002301074700002001097700002701117700002801144856013101172 2015 eng d a1144-054600aTris-hydroxymethylaminomethane (THAM): a novel organocatalyst for a environmentally benign synthesis of medicinally important tetrahydrobenzo[b]pyrans and pyran-annulated heterocycles0 aTrishydroxymethylaminomethane THAM a novel organocatalyst for a  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAR a4452-44630 v393 a

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.

1 aPandit, Kapil, S.1 aChavan, Pramod, V.1 aDesai, Uday, V.1 aKulkarni, Makarand, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/tris-hydroxymethylaminomethane-tham-novel-organocatalyst-environmentally-benign-synthesis-000795nas a2200205 4500008004100000245014100041210006900182260000800251300002200259490000600281100001800287700002000305700001900325700002000344700001900364700002800383700002100411700002500432856013200457 2016 eng d00a3D Polyaniline architecture by concurrent inorganic and organic acid doping for superior and robust high rate supercapacitor performance0 a3D Polyaniline architecture by concurrent inorganic and organic  cFEB aArticle No. 210020 v61 aGawli, Yogesh1 aBanerjee, Abhik1 aDhakras, Dipti1 aDeo, Meenal, S.1 aBulani, Dinesh1 aWadgaonkar, Prakash, P.1 aShelke, Manjusha1 aOgale, Satishchandra uhttps://library.ncl.res.in/content/3d-polyaniline-architecture-concurrent-inorganic-and-organic-acid-doping-superior-and-robust03022nas a2200265 4500008004100000022001400041245021600055210006900271260006700340300001200407490000700419520185700426653002602283653003702309653007102346653001602417653004102433653002502474653003202499653002002531100002202551700002602573700002802599856012902627 2016 eng d a0887-624X00aConvenient synthesis of alpha,alpha `- homo- and alpha,alpha `-hetero-bifunctionalized poly(epsilon-caprolactone)s by ring opening polymerization: the potentially valuable precursors for miktoarm star copolymers0 aConvenient synthesis of alphaalpha homo and alphaalpha heterobif a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcMAR a844-8600 v543 a

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

10a3-allylsalicyaldehyde10aalpha `-allyloxy and alpha-allyl10aalpha `-propargyloxy bifunctionalized poly (epsilon-caprolactone)s10aalpha-allyl10aatom transfer radical polymerization10aorthogonal reactions10aring-opening polymerization10astar copolymers1 aPatil, Sachin, S.1 aTawade, Bhausaheb, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/convenient-synthesis-alphaalpha-homo-and-alphaalpha-hetero-bifunctionalized-polyepsilon-001141nas a2200181 4500008004100000245012900041210006900170260000800239300001400247490000700261520044000268100002600708700002200734700002000756700002700776700002800803856012800831 2016 eng d00aDiethylamine-catalyzed environmentally benign synthesis of 1-oxo-hexahydroxanthenes and bis-coumarins at ambient temperature0 aDiethylaminecatalyzed environmentally benign synthesis of 1oxohe cJUL a6313-63250 v423 aAn 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.1 aKupwade, Ravindra, V.1 aPandit, Kapil, S.1 aDesai, Uday, V.1 aKulkarni, Makarand, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/diethylamine-catalyzed-environmentally-benign-synthesis-1-oxo-hexahydroxanthenes-and-bis01966nas a2200217 4500008004100000022001400041245014600055210006900201260009900270300001000369490000700379520107700386653001901463653001401482653002801496100002601524700002101550700002801571700002201599856012701621 2016 eng d a0032-386100aIncorporation of rigid polyaromatic groups in polybenzimidazole-based polymeric ionic liquids: assertive effects on gas permeation properties0 aIncorporation of rigid polyaromatic groups in polybenzimidazoleb aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcJUN a30-360 v933 a

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.

10aGas permeation10amembranes10aPolymeric ionic liquids1 aShaligram, Sayali, V.1 aRewar, Anita, S.1 aWadgaonkar, Prakash, P.1 aKharul, Ulhas, K. uhttps://library.ncl.res.in/content/incorporation-rigid-polyaromatic-groups-polybenzimidazole-based-polymeric-ionic-liquids02124nas a2200253 4500008004100000022001400041245012300055210006900178260011000247300001600357490000600373520114700379100002301526700002001549700002001569700002101589700002101610700002101631700002801652700002101680700001801701700002401719856012701743 2016 eng d a2046-206900aModulation of charge carrier mobility by side-chain engineering of bi(thienylenevinylene)thiophene containing PPE-PPVs0 aModulation of charge carrier mobility by sidechain engineering o aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY a51642-516480 v63 a

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.

1 aJadhav, Rupali, R.1 aCamaioni, Nadia1 aOppelt, Kerstin1 aTinti, Francesca1 aGazzano, Massimo1 aFattori, Valeria1 aWadgaonkar, Prakash, P.1 aRathgeber, Silke1 aHoppe, Harald1 aEgbe, Daniel, A. M. uhttps://library.ncl.res.in/content/modulation-charge-carrier-mobility-side-chain-engineering-bithienylenevinylenethiophene01977nas a2200265 4500008004100000022001400041245011600055210006900171260011000240300001400350490000600364520099300370100002601363700001701389700001901406700002001425700001801445700002401463700002001487700001601507700001901523700002001542700002801562856012101590 2016 eng d a2050-752600aPhenothiazine and carbazole substituted pyrene based electroluminescent organic semiconductors for OLED devices0 aPhenothiazine and carbazole substituted pyrene based electrolumi aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcDEC a1009-10180 v43 a

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.

1 aSalunke, Jagadish, K.1 aWong, F., L.1 aFeron, Krishna1 aManzhos, Sergei1 aLo, Ming, Fai1 aShinde, Durgaprasad1 aPatil, Abhijeet1 aLee, C., S.1 aRoy, V., A. L.1 aSonar, Prashant1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/phenothiazine-and-carbazole-substituted-pyrene-based-electroluminescent-organic-001856nas a2200277 4500008004100000022001400041245017400055210006900229260007100298300001400369490000600383520075300389653004201142653004201184653001701226653002001243653002901263653001901292100002201311700002601333700002301359700002001382700002801402700002101430856012701451 2016 eng d a2168-048500aProblem solving and environmentally benign approach toward diversity oriented synthesis of novel 2-amino-3-phenyl (or Alkyl) sulfonyl-4H-chromenes at ambient temperature0 aProblem solving and environmentally benign approach toward diver a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN a3450-34640 v43 a

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.

10a2-Amino-3-methylsulfonyl-4H-chromenes10a2-Amino-3-phenylsulfonyl-4H-chromenes10adiethylamine10agreen chemistry10aMulticomponent synthesis10aorganocatalyst1 aPandit, Kapil, S.1 aKupwade, Ravindra, V.1 aChavan, Pramod, V.1 aDesai, Uday, V.1 aWadgaonkar, Prakash, P.1 aKodam, Kisan, M. uhttps://library.ncl.res.in/content/problem-solving-and-environmentally-benign-approach-toward-diversity-oriented-synthesis02506nas a2200253 4500008004100000022001400041245008900055210006900144260006700213300001200280490000700292520159100299653003501890653002501925653001501950653002501965653002201990100002602012700002602038700002402064700002202088700002802110856011402138 2016 eng d a0959-810300aSynthesis and properties of poly(arylene ether)s based on 3-pentadecyl 4,4'-biphenol0 aSynthesis and properties of polyarylene ethers based on 3pentade a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcMAY a567-5760 v653 a

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

10acashew nut shell liquid (CNSL)10agas permeation study10apentadecyl10apoly(arylene ether)s10athermal stability1 aTawade, Bhausaheb, V.1 aShaligram, Sayali, V.1 aValsange, Nitin, G.1 aKharul, Ulhas, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-properties-polyarylene-ethers-based-3-pentadecyl-44-biphenol02210nas a2200265 4500008004100000022001400041245010700055210006900162260000900231300000700240490000700247520130000254653002401554653002401578653001501602653002201617100002501639700002801664700002401692700002601716700002901742700002301771700002801794856012201822 2017 eng d a1022-976000aAromatic polyesters containing pendent 4-(phenylsulfonyl)phenyl groups: synthesis and characterization0 aAromatic polyesters containing pendent 4phenylsulfonylphenyl gro cMAR  a570 v243 a

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.

10aAromatic polyesters10aBulky pendent group10asolubility10athermal stability1 aBapat, Snehalata, P.1 aJadhav, Sushilkumar, A.1 aValsange, Nitin, G.1 aTawade, Bhausaheb, V.1 aHonkhambe, Pandurang, N.1 aChavan, Nayaku, N.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/aromatic-polyesters-containing-pendent-4-phenylsulfonylphenyl-groups-synthesis-and00768nas a2200193 4500008004100000245016500041210006900206260000800275300001400283490000700297100002300304700002200327700002000349700002800369700001900397700002000416700001900436856011900455 2017 eng d00aClick-chemistry-based multicomponent condensation approach for design and synthesis of spirochromene-tethered 1,2,3-triazoles as potential antitubercular agents0 aClickchemistrybased multicomponent condensation approach for des cOCT a5675-56900 v431 aChavan, Pramod, V.1 aPandit, Kapil, S.1 aDesai, Uday, V.1 aWadgaonkar, Prakash, P.1 aNawale, Laxman1 aBhansali, Sujit1 aSarkar, Dhiman uhttps://library.ncl.res.in/content/click-chemistry-based-multicomponent-condensation-approach-design-and-synthesis01324nas a2200181 4500008004100000245021200041210006900253260000800322300001600330490000600346520054700352100002600899700001800925700002100943700002000964700002800984856013001012 2017 eng d00aDiethylamine 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 temperature0 aDiethylamine DessMartin periodinane an efficient catalystoxidant cAUG a38877-388830 v73 aHerein, diethylamine Dess–Martin periodinane has been demonstrated for the first time as an efficient catalyst–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.1 aKupwade, Ravindra, V.1 aKhot, Supriya1 aKulkarni, M., A.1 aDesai, Uday, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/diethylamine-dess-martin-periodinane-efficient-catalyst-oxidant-combination-sequential-one02316nas a2200193 4500008004100000245013900041210006900180260000800249300001400257490000700271520160300278653001101881653001301892653001901905100002201924700001701946700002801963856013101991 2017 eng d00aHealable network polymers bearing flexible poly(Lauryl Methacrylate) chains via thermo-reversible furan-maleimide diels-alder reaction0 aHealable network polymers bearing flexible polyLauryl Methacryla cAUG a2700-27120 v553 aA 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',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',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.10aethane10aMonomers10apolymerization1 aPatil, Sachin, S.1 aTorris, Arun1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/healable-network-polymers-bearing-flexible-polylauryl-methacrylate-chains-thermo-reversible01786nas a2200253 4500008004100000245015000041210006900191260000800260300001600268490000700284520089200291100002401183700001701207700002401224700001601248700001901264700002001283700001401303700001801317700001701335700002001352700002801372856013201400 2017 eng d00aNew pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence0 aNew pyrene cored small organic molecule with a flexible alkyl sp cOCT a11383-113900 v413 aA 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).1 aValsange, Nitin, G.1 aWong, F., L.1 aShinde, Durgaprasad1 aLee, C., S.1 aRoy, V., A. L.1 aManzhos, Sergei1 aFeron, K.1 aChang, Samuel1 aKatoh, Ryuzi1 aSonar, Prashant1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-pyrene-cored-small-organic-molecule-flexible-alkyl-spacer-potential-solution-processable02687nas a2200361 4500008004100000022001400041245021300055210006900268260000800337300001400345490000700359520141200366653002201778653002601800653003401826653001101860653001301871653001501884653001401899653002301913653002401936653002501960653003301985653002502018653001802043653002502061653001302086100002302099700002002122700002302142700002802165856013202193 2017 eng d a0887-624X00aPartially bio-based poly(amide imide)s by polycondensation of aromatic diacylhydrazides based on lignin-derived phenolic acids and aromatic dianhydrides: synthesis, characterization, and computational studies0 aPartially biobased polyamide imides by polycondensation of aroma cNOV a3636-36450 v553 a

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.

10aBiobased Polymers10aComputational studies10aGlass-transaction temperature10alignin10aMonomers10aPlant oils10aPolyimide10aReneable resources10aRenewable resources10aStep-growth polymers10astructure-property relations10aSustanaible Polymers10aThermal night10aThermosetting resins10aVanillin1 aKuhire, Sachin, S.1 aSharma, Pragati1 aChakrabarty, Suman1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/partially-bio-based-polyamide-imides-polycondensation-aromatic-diacylhydrazides-based-lignin02084nas a2200145 4500008004100000245009500041210006900136260000800205490000600213520152000219100002301739700002601762700002801788856012201816 2017 eng d00aPartially bio-based processable polyimides based on aromatic diamine derived from cardanol0 aPartially biobased processable polyimides based on aromatic diam cJUN0 v53 aA 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’-oxydianiline with 3,3’,4,4’-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 161–254 °C. The lowering of Tg could be attributed to the presence of flexible pentadecyl chains which act as “packing disruptive” groups. The temperature at 10% weight loss (T10) of (co)polyimides was in the range 490–515 °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° indicating their potential application as alignment layer in liquid crystal display devices.1 aShingte, Rahul, D.1 aTawade, Bhausaheb, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/partially-bio-based-processable-polyimides-based-aromatic-diamine-derived-cardanol01830nas a2200205 4500008004100000245016600041210007000207260000800277300001200285490000700297520103000304100002101334700001701355700002001372700002201392700002401414700002501438700002801463856013301491 2017 eng d00aPhenothiazine-based D-A-π-A dyes for highly efficient dye sensitized solar cells: effect of internal acceptor and non-conjugated π-spacer on device performance0 aPhenothiazinebased DAπA dyes for highly efficient dye sensitized cFEB a280-2860 v823 aThree 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 'internal acceptors' (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.1 aNagane, Satyawan1 aIchake, Amol1 aAgrawal, Ishita1 aSadhanala, Aditya1 aFriend, Richard, H.1 aOgale, Satishchandra1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/phenothiazine-based-d-%CF%80-dyes-highly-efficient-dye-sensitized-solar-cells-effect-internal02036nas a2200205 4500008004100000245009800041210006900139300001200208520126600220100002701486700002801513700002301541700002101564700002601585700002301611700002101634700002101655700002801676856012601704 2017 eng d00aStep-growth polymers from cashew nut shell liquid (CNSL)-based aromatic difunctional monomers0 aStepgrowth polymers from cashew nut shell liquid CNSLbased aroma a163-2143 a

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.

1 aChatterjee, Deepshikha1 aSadavarte, Nilakshi, V.1 aShingte, Rahul, D.1 aMore, Arvind, S.1 aTawade, Bhausaheb, V.1 aKulkarni, Arun, D.1 aIchake, Amol, B.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/step-growth-polymers-cashew-nut-shell-liquid-cnsl-based-aromatic-difunctional-monomers01042nas a2200169 4500008004100000245010700041210006900148260000800217300001200225490000700237520041400244100002200658700002000680700002800700700002100728856012300749 2017 eng d00aSulfamic acid-catalyzed, environmentally benign synthesis of bis-tetronic acids at ambient temperature0 aSulfamic acidcatalyzed environmentally benign synthesis of biste cJAN a141-1520 v433 aAn 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.1 aPandit, Kapil, S.1 aDesai, Uday, V.1 aWadgaonkar, Prakash, P.1 aKodam, Kisan, M. uhttps://library.ncl.res.in/content/sulfamic-acid-catalyzed-environmentally-benign-synthesis-bis-tetronic-acids-ambient02628nas a2200145 4500008004100000245015400041210006900195260000800264490000700272520199600279100002602275700002402301700002802325856012902353 2017 eng d00aSynthesis and characterization of polyhydrazides and poly(1,3,4-oxadiazole)s containing multiple arylene ether linkages and pendent pentadecyl chains0 aSynthesis and characterization of polyhydrazides and poly134oxad cSEP0 v293 a

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 0.65–0.72 dL g−1 and 0.54–0.62 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 425–440°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 175–192°C and 92–103°C, respectively. The excellent solubility characteristics and the large gap between T g (92–103°C) and T 10 (425–440°C) values give poly(1,3,4-oxadiazole)-containing pendent pentadecyl chains better opportunities for processability.

1 aTawade, Bhausaheb, V.1 aValsange, Nitin, G.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-polyhydrazides-and-poly134-oxadiazoles-containing-multiple02081nas a2200181 4500008004100000245008100041210006900122260000800191300001400199490000600213520144700219100002701666700002201693700002501715700002801740700002101768856011001789 2017 eng d00aThermo-reversible sol-gel transition of aqueous solutions of patchy polymers0 aThermoreversible solgel transition of aqueous solutions of patch cJAN a5101-51100 v73 aWhile 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.1 aParmar, Indravadan, A.1 aShedge, Aarti, S.1 aBadiger, Manohar, V.1 aWadgaonkar, Prakash, P.1 aLele, Ashish, K. uhttps://library.ncl.res.in/content/thermo-reversible-sol-gel-transition-aqueous-solutions-patchy-polymers02369nas a2200157 4500008004100000245010500041210006900146260000800215300001400223490000700237520176800244100002102012700002202033700002802055856012802083 2018 eng d00aDesign, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups0 aDesign synthesis and gas permeation properties of polyimides con cAUG a1721-17290 v563 aFilm-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, 1721-17291 aShrimant, Bharat1 aKharul, Ulhas, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/design-synthesis-and-gas-permeation-properties-polyimides-containing-pendent-imidazolium01505nas a2200253 4500008004100000245015300041210006900194260000800263300001600271490000700287520064100294653001700935653002000952653001400972653001000986653001300996653001501009100002001024700001701044700001601061700001801077700002801095856012801123 2018 eng d00aErratum to: catalyst-free oxidation of sulfides to sulfoxides and diethylamine catalyzed oxidation of sulfides to sulfones using oxone as an oxidant0 aErratum to catalystfree oxidation of sulfides to sulfoxides and  cFEB a1437–14370 v443 a

We describe here our journey from the failure of our attempts in controlled oxidation of sulfides to sulfoxides using an Oxone®–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.

10adiethylamine10aorganocatalysis10aOxidation10aOxone10aSulfones10aSulfoxides1 aKupwade, R., V.1 aKhot, S., S.1 aLad, U., P.1 aDesai, U., V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/erratum-catalyst-free-oxidation-sulfides-sulfoxides-and-diethylamine-catalyzed-oxidation02538nas a2200229 4500008004100000022001400041245014600055210006900201260000900270300001200279490000700291520170500298653002102003653002802024653001502052653001902067100002102086700001902107700002202126700002802148856013202176 2018 eng d a0887-624X00aIntrinsically microporous polyimides containing spirobisindane and phenazine units: synthesis, characterization and gas permeation properties0 aIntrinsically microporous polyimides containing spirobisindane a cAPR  a766-7750 v563 aA 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, 766-77510aGas permeability10aintrinsic microporosity10apolyimides10aspirobisindane1 aShrimant, Bharat1 aDangat, Yuvraj1 aKharul, Ulhas, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/intrinsically-microporous-polyimides-containing-spirobisindane-and-phenazine-units-synthesis02459nas a2200241 4500008004100000022001400041245013700055210006900192260000800261300001400269490000700283520159400290100002701884700002401911700002001935700002201955700002501977700002402002700002802026700001502054700002102069856012702090 2018 eng d a1744-683X00aMechanism of the formation of microphase separated water clusters in a water-mediated physical network of perfluoropolyether tetraol0 aMechanism of the formation of microphase separated water cluster cMAR a2339-23450 v143 a

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.

1 aDeshpande, Ashwini, A.1 aTorris, Arun, A. T.1 aPahari, Swagata1 aMenon, Shamal, K.1 aBadiger, Manohar, V.1 aRajamohanan, P., R.1 aWadgaonkar, Prakash, P.1 aRoy, Sudip1 aTonelli, Claudio uhttps://library.ncl.res.in/content/mechanism-formation-microphase-separated-water-clusters-water-mediated-physical-network01950nas a2200253 4500008004100000022001400041245010600055210006900161260000800230300002300238490000700261520108800268653001901356653001401375653002801389100002201417700001701439700002201456700001801478700002201496700001901518700002801537856013101565 2018 eng d a1022-976000aPhenazine-containing poly(phenylenevinylene): a new polymer with impressive field emission properties0 aPhenazinecontaining polyphenylenevinylene a new polymer with imp cFEB aArticle Number: 610 v253 a

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'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.

10afield emission10aPhenazine10aPoly(phenylenevinylene)1 aChhatre, Shraddha1 aIchake, Amol1 aHarpale, Kashmira1 aPatil, Sumati1 aDeshpande, Aparna1 aMore, Mahendra1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/phenazine-containing-polyphenylenevinylene-new-polymer-impressive-field-emission-properties01815nas a2200169 4500008004100000022001500041245014400056210006900200260000900269300001200278490000800290520115400298100002101452700002201473700002801495856012201523 2018 eng d a1381-5148 00aSpiro [fluorene-9,9 '-xanthene]-containing copolymers of intrinsic microporosity: synthesis, characterization and gas permeation properties0 aSpiro fluorene99 xanthenecontaining copolymers of intrinsic micr c2018 a153-1600 v1333 aIn the present study, a new bis(catechol) containing spiro[fluorene-9,9'-xanthene], namely, 4,4'-(spiro(fluorene9,9'-xanthene]-2',7'-diyl)bis(benzene-1,2-diol) (THSFX) was designed and synthesized. Polycondensation reactions of THSFX and varying compositions of THSFX and 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethyl-1,1'-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 pairs1 aShrimant, Bharat1 aKharul, Ulhas, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/spiro-fluorene-99-xanthene-containing-copolymers-intrinsic-microporosity-synthesis01397nas a2200193 4500008004100000022001400041245014300055210006900198260000900267300001200276490000800288520066800296100002300964700002100987700001801008700001901026700002801045856013001073 2018 eng d a0014-305700a Synthesis and characterization of partially bio-based polyimides based on biphenylene-containing diisocyanate derived from vanillic acid 0 aSynthesis and characterization of partially biobased polyimides  c DEC a257-2640 v1093 aA new bio-based biphenylene-containing diisocyanate, namely, 5,5'-diisocyanato-2,2',3,3'-tetramethoxy-1,1'-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.1 aKuhire, Sachin, S.1 aIchake, Amol, B.1 aGrau, Etienne1 aCramail, Henri1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-partially-bio-based-polyimides-based-biphenylene-containing02571nas a2200241 4500008004100000022001400041245012400055210006900179260000900248300001000257490000700267520172200274653001501996653001902011653002802030653001402058653003302072100002102105700002602126700002202152700002802174856012702202 2018 eng d a0887-624X00aSynthesis, characterization, and gas permeation properties of adamantane-containing polymers of intrinsic microporosity0 aSynthesis characterization and gas permeation properties of adam cJAN  a16-240 v563 a

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.

10aadamantane10aGas permeation10aintrinsic microporosity10amembranes10astructure-property relations1 aShrimant, Bharat1 aShaligram, Sayali, V.1 aKharul, Ulhas, K.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-characterization-and-gas-permeation-properties-adamantane-containing-polymers01383nas a2200241 4500008004100000022001300041245014800054210006900202260000900271300001200280490000700292520050000299653002000799653002900819653002000848653001900868653003500887100002200922700002600944700002000970700002800990856012301018 2018 eng d a1631074800aTris-hydroxymethylaminomethane (THAM): An efficient organocatalyst in diversity-oriented and environmentally benign synthesis of spirochromenes0 aTrishydroxymethylaminomethane THAM An efficient organocatalyst i cJUN  a814-8210 v213 a

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.

10agreen chemistry10aMulticomponent synthesis10aorganocatalysis10aSpirochromenes10aTris-hydroxymethylaminomethane1 aKhot, Supriya, S.1 aAnbhule, Prashant, V.1 aDesai, Uday, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/tris-hydroxymethylaminomethane-tham-efficient-organocatalyst-diversity-oriented-and02298nas a2200253 4500008004100000022001400041245012500055210006900180260000800249300000600257490000700263520141900270653002701689653001801716653002001734653002901754653001601783100002501799700002301824700002101847700002401868700002801892856012401920 2019 eng d a1022-976000aAromatic polycarbonates bearing pendant maleimide groups via functional monomer approach: synthesis and characterization0 aAromatic polycarbonates bearing pendant maleimide groups via fun cDEC a80 v273 a

A new bisphenol containing pendant maleimide group, viz., 4, 4'-(5-maleimidopentane-2, 2-diyl) diphenol (BPA-MA), was synthesized starting from commercially available 4, 4'-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).

10aAromatic polycarbonate10aCross-linking10amaleimide group10aThiol-maleimide reaction10aTriphosgene1 aNagane, Samadhan, S.1 aKuhire, Sachin, S.1 aIchake, Amol, B.1 aRajamohanan, P., R.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/aromatic-polycarbonates-bearing-pendant-maleimide-groups-functional-monomer-approach02858nas a2200265 4500008004100000022001400041245013400055210006900189260000800258300001200266490000800278520193200286653002302218653002602241653002002267653002402287653002602311100002502337700001802362700000502380700002202385700003002407700002802437856012702465 2019 eng d a0014-305700aAromatic polyesters containing pendant azido groups: synthesis, characterization, chemical modification and thermal cross-linking0 aAromatic polyesters containing pendant azido groups synthesis ch cJUL a180-1890 v1163 a

A partially bio-based bisphenol containing pendant azido group viz., 4,4'-(5-azidopentane-2,2-diyl) diphenol (AZBPA) was synthesized starting from 4,4'-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'-(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's modulus and lower % elongation at break compared to corresponding pristine polyesters containing pendant azido groups.

10aAromatic polyester10aChemical modification10aClick chemistry10aPendant azido group10aThermal cross-linking1 aNagane, Samadhan, S.1 aVerma, Savita1 a1 aSane, Prakash, S.1 aDhanmane, Sushilkumar, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/aromatic-polyesters-containing-pendant-azido-groups-synthesis-characterization-chemical01712nas a2200289 4500008004100000022001400041245018100055210006900236260000900305300001400314490000600328520076400334653000601098653000601104653001601110653002201126653002001148653001301168653002001181653002701201100000501228700002701233700000501260700000501265700002801270856012401298 2019 eng d a2365-654900aBentonite - Clay - supported cuprous iodide nanoparticles (BENT- CuI NPs): a new heterogeneous catalyst in diversity - oriented synthesis of 1, 2, 3-triazoles in aqueous medium0 aBentonite Clay supported cuprous iodide nanoparticles BENT CuI N cJUN  a7144-71500 v43 a

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.

10a110a210a3-triazoles10aarylboronic acids10aclick synthesis10aepoxides10agreen chemistry10aheterogeneous catalyst1 a1 aCharate, Shrinivas, P.1 a1 a1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/bentonite-clay-supported-cuprous-iodide-nanoparticles-bent-cui-nps-new-heterogeneous02531nas a2200325 4500008004100000022001400041245014900055210006900204260000800273300001200281490000700293520147400300653000601774653000601780653003801786653001501824653002001839653002001859653001701879653002801896653002901924100000501953700000501958700002801963700002301991700002102014700002002035700001902055856013102074 2019 eng d a0045-206800aClick chemistry based multicomponent approach in the synthesis of spirochromenocarbazole tethered 1,2,3-triazoles as potential anticancer agents0 aClick chemistry based multicomponent approach in the synthesis o cAPR a475-4860 v853 a

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.

10a110a210a3-Triazolylspirochromenocarbazole10aAnticancer10aApoptotic assay10aClick chemistry10aCytotoxicity10aheterogeneous catalysis10aMulticomponent synthesis1 a1 a1 aWadgaonkar, Prakash, P.1 aTapase, Savita, R.1 aKodam, Kisan, M.1 aChoudhari, Amit1 aSarkar, Dhiman uhttps://library.ncl.res.in/content/click-chemistry-based-multicomponent-approach-synthesis-spirochromenocarbazole-tethered-12302437nas a2200253 4500008004100000022001400041245009100055210006900146260000900215300001200224490000700236520160100243653001701844653002001861653001701881653001501898653002001913100002501933700002301958700002101981700003002002700002802032856012302060 2019 eng d a0887-624X00aDesign and synthesis of aromatic polyesters bearing pendant clickable maleimide groups0 aDesign and synthesis of aromatic polyesters bearing pendant clic cMAR  a630-6400 v573 a

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

10acrosslinking10amaleimide group10amodification10apolyesters10athiol-maleimide1 aNagane, Samadhan, S.1 aKuhire, Sachin, S.1 aJadhav, Uday, A.1 aDhanmane, Sushilkumar, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/design-and-synthesis-aromatic-polyesters-bearing-pendant-clickable-maleimide-groups02595nas a2200241 4500008004100000022001400041245016600055210006900221260000900290300001200299490000700311520166800318653004801986653002702034653003802061653002102099653001602120100001902136700002802155700002102183700002602204856012302230 2019 eng d a0887-624X00aNew approach for the synthesis of miktoarm star polymers through a combination of thiol-epoxy ``click'' chemistry and ATRP/Ring-opening polymerization techniques0 aNew approach for the synthesis of miktoarm star polymers through cJAN  a146-1560 v573 a

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 ``grafting onto'' and ``grafting from'' 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 ``click'' 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

10aAtom transfer radical polymerization (ATRP)10amiktoarm star polymers10aring-opening polymerization (ROP)10athermoresponsive10athiol-epoxy1 aGadwal, Ikhlas1 aWadgaonkar, Prakash, P.1 aIchake, Amol, B.1 aMane, Shivshankar, R. uhttps://library.ncl.res.in/content/new-approach-synthesis-miktoarm-star-polymers-through-combination-thiol-epoxy-click02465nas a2200253 4500008004100000022001400041245010100055210006900156260000900225300001400234490000700248520158800255653002701843653001601870653002001886653002601906100002201932700002501954700002101979700002502000700002602025700002802051856013202079 2019 eng d a0887-624X00aNew cardo bisphenol monomer containing pendant azido group and the resulting aromatic polyesters0 aNew cardo bisphenol monomer containing pendant azido group and t cJUL  a1516-15260 v573 a

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.

10aaromatic (co)polyester10aazido group10acardo bisphenol10aChemical modification1 aMaher, Deepak, M.1 aNagane, Samadhan, S.1 aJadhav, Uday, A.1 aSalunkhe, Pravin, H.1 aTawade, Bhausaheb, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/new-cardo-bisphenol-monomer-containing-pendant-azido-group-and-resulting-aromatic-polyesters02667nas a2200181 4500008004100000022001400041245016800055210006900223260000900292300001400301490000700315520193500322100002502257700002302282700002602305700002802331856012602359 2019 eng d a1759-995400aPartially bio-based aromatic poly(ether sulfone)s bearing pendant furyl groups: synthesis, characterization and thermo-reversible cross-linking with a bismaleimide0 aPartially biobased aromatic polyether sulfones bearing pendant f cMAR  a1089-10980 v103 a

A fully bio-based bisphenol bearing pendant furyl group, viz., 4,4'-(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'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'-(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's modulus compared to parent copoly(ether sulfone) and was recycled two times with retention of mechanical properties.

1 aNagane, Samadhan, S.1 aKuhire, Sachin, S.1 aMane, Shivshankar, R.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/partially-bio-based-aromatic-polyether-sulfones-bearing-pendant-furyl-groups-synthesis02623nas a2200265 4500008004100000022001400041245011300055210006900168260000800237300001200245490000700257520172900264653002001993653001702013653001702030653001502047653001702062653003102079100001802110700002202128700002502150700002602175700002802201856012802229 2019 eng d a0887-624X00aThermally crosslinkable and chemically modifiable aromatic polyesters possessing pendant propargyloxy groups0 aThermally crosslinkable and chemically modifiable aromatic polye cMAR a588-5970 v573 a

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

10aClick chemistry10acrosslinking10amodification10apolyesters10apropargyloxy10astep-growth polymerization1 aVerma, Savita1 aMaher, Deepak, M.1 aNagane, Samadhan, S.1 aTawade, Bhausaheb, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/thermally-crosslinkable-and-chemically-modifiable-aromatic-polyesters-possessing-pendant03073nas a2200277 4500008004100000022001400041245020500055210006900260260000800329300001100337490000800348520203700356653001802393653001102411653001902422653003702441653002302478100002202501700002302523700002402546700002302570700002602593700002802619700002802647856012002675 2020 eng d a1386-142500aHighly reproducible, simple and selective analytical method for extractive UV-visible spectrophotometric determination of ruthenium (III): analysis of catalyst, fissium alloy and sequential separation0 aHighly reproducible simple and selective analytical method for e cDEC a1188140 v2433 a

An easy and selective method has been developed for the extractive spectrophotometric determination of ruthenium(III) with 4-(4'-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 `soft base' FBIMMT with `soft acid' 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'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'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'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.

10aAlloy samples10aFBIMMT10aRuthenium(III)10aSpectrophotometric determination10aSynthetic mixtures1 aShaikh, Abdul, B.1 aBarache, Umesh, B.1 aKhogare, Balaji, T.1 aGoswami, Ritusmita1 aKokare, Balasaheb, N.1 aWadgaonkar, Prakash, P.1 aGaikwad, Shashikant, H. uhttps://library.ncl.res.in/content/highly-reproducible-simple-and-selective-analytical-method-extractive-uv-visible02274nas a2200241 4500008004100000022001400041245008500055210006900140260000800209490000700217520146300224653003901687653001401726653001701740653002501757653002501782100002301807700002601830700000501856700002501861700002801886856011801914 2021 eng d a0959-810300aPartially bio-based furyl-functionalized organosoluble poly(ether ether ketone)s0 aPartially biobased furylfunctionalized organosoluble polyether e cAUG0 v703 a

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 `-(furan-2-ylmethylene)bis(2-methoxyphenol) and bisphenol-A with 4,4 `-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 `-(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

10aaromatic poly(ether ether ketone)s10abio-based10acrosslinking10aDiels-Alder reaction10apendent furyl groups1 aKuhire, Sachin, S.1 aTalanikar, Aniket, A.1 a1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/partially-bio-based-furyl-functionalized-organosoluble-polyether-ether-ketones02531nas a2200265 4500008004100000022001400041245014600055210006900201260000900270300001100279490000800290520160100298653002501899653000901924653001801933653001501951653001701966100002701983700002102010700003402031700002502065700002202090700002802112856012502140 2021 eng d a0014-305700aPartially bio-based triarylamine-containing polyimides: synthesis, characterization and evaluation in non-volatile memory device applications0 aPartially biobased triarylaminecontaining polyimides synthesis c cMAR  a1103270 v1473 a

A new triarylamine-containing diamine, viz. 4, 4'-diamino-4 `' 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'-diamino-4 `' pentadecyltriphenylamine with aromatic dianhydrides, namely, 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), 4,4'-oxydiphthalic anhydride (ODPA) and 4,4'-(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.

10aBio-based polyimides10aCNSL10aMemory device10apentadecyl10aTriarylamine1 aChatterjee, Deepshikha1 aJadhav, Uday, A.1 aJavaregowda, Bharathkumar, H.1 aDongale, Tukaram, D.1 aPatil, Pramod, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/partially-bio-based-triarylamine-containing-polyimides-synthesis-characterization-and02543nas a2200253 4500008004100000022001400041245012700055210006900182260000800251300001200259490000700271520162900278653002701907653002601934653002401960653002501984653002902009100002502038700002202063700001802085700002602103700002802129856013202157 2022 eng d a1060-132500aPendant propargyloxy-functionalized aromatic (co)polycarbonates: synthesis, thermal crosslinking and chemical modification0 aPendant propargyloxyfunctionalized aromatic copolycarbonates syn cNOV a752-7630 v593 a

A bisphenol monomer bearing pendant propargyloxy group viz, 1, 1-bis (4-hydoxyphenyl)-1-(4 `-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.

10aAromatic polycarbonate10aChemical modification10apropargyloxy groups10athermal crosslinking10athiol-yne click reaction1 aNagane, Samadhan, S.1 aMaher, Deepak, M.1 aVerma, Savita1 aTalanikar, Aniket, A.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/pendant-propargyloxy-functionalized-aromatic-copolycarbonates-synthesis-thermal-crosslinking02784nas a2200241 4500008004100000022001400041245013400055210006900189260000900258300001100267490000800278520190300286653002902189653001402218653001902232653003102251653002302282100002602305700002502331700002802356700002702384856013102411 2022 eng d a0014-305700aPost-polymerization modifiable aromatic (co)poly(ether sulfone)s possessing pendant norbornenyl groups based upon a new bisphenol0 aPostpolymerization modifiable aromatic copolyether sulfones poss cAUG  a1114310 v1763 a

A new bisphenol possessing pendant norbornenyl group viz., 4, 4 `-(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.

10a(Co)poly(ether sulfone)s10abisphenol10aCross -linking10aPendant norbornenyl groups10aThiol-ene reaction1 aTalanikar, Aniket, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S. uhttps://library.ncl.res.in/content/post-polymerization-modifiable-aromatic-copolyether-sulfones-possessing-pendant-norbornenyl02482nas a2200277 4500008004100000022001400041245014400055210006900199260000800268300001200276490000800288520150900296653002801805653002301833653002801856653002101884653002401905100002101929700002501950700002101975700001701996700001802013700001902031700002802050856012602078 2022 eng d a1022-135200aSynthesis and characterization of partially biobased aromatic (Co)polycarbonates containing biphenylene units and pendant pentadecyl chains0 aSynthesis and characterization of partially biobased aromatic Co cJUL a21004490 v2233 a

2-Pentadecyl-[1,1''-biphenyl]-4,4''-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.

10aaromatic polycarbonates10abiobased bisphenol10aCashew nut shell liquid10apentadecyl chain10aRenewable resources1 aIchake, Amol, B.1 aNagane, Samadhan, S.1 aJadhav, Uday, A.1 aTorris, Arun1 aGrau, Etienne1 aCramail, Henri1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-partially-biobased-aromatic-copolycarbonates-containing02425nas a2200265 4500008004100000022001400041245011200055210006900167260000800236300001500244490000600259520150600265653002701771653002401798653003001822653001601852653002001868100002501888700002301913700002101936700002601957700002001983700002802003856012802031 2022 eng d a2365-654900aSynthesis, characterization and UV-crosslinking of aromatic (Co)polycarbonates bearing pendant azido groups0 aSynthesis characterization and UVcrosslinking of aromatic Copoly cSEP ae2022010200 v73 a

A new series of (co)polycarbonates bearing pendent azido groups was synthesized by polycondensation of varying molar proportions of 4, 4'-(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's modulus and decrease in % elongation compared to corresponding parent linear (co)polycarbonates.

10aAromatic polycarbonate10aPendant azido group10asolution polycondensation10aTriphosgene10aUV-crosslinking1 aNagane, Samadhan, S.1 aKuhire, Sachin, S.1 aIchake, Amol, B.1 aTalanikar, Aniket, A.1 aLochab, Bimlesh1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-characterization-and-uv-crosslinking-aromatic-copolycarbonates-bearing-pendant02313nas a2200229 4500008004100000022001400041245006300055210005800118260000900176300001200185490000700197520155300204653003401757653003201791653002301823653003701846100002601883700002501909700002801934700002701962856009401989 2023 eng d a1060-132500aNorbornenyl-pendant aromatic (co)poly(ether ether ketone)s0 aNorbornenylpendant aromatic copolyether ether ketones cNOV  a790-8000 v603 a

4, 4'-(Bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) was utilized as a step-growth monomer for the synthesis of (co)poly(ether ether ketone)s (PEEK-NBs) via nucleophilic aromatic substitution polycondensation. A homo and five PEEK-NBs were synthesized by polycondensation of 4, 4'-difluorobenzophenone with BPA-NB and various compositions of BPA-NB and bisphenol-A, respectively. H-1 NMR spectroscopy confirmed the chemical structure and composition of PEEK-NBs. Inherent viscosity and number-average molecular weight values of PEEK-NBs were in the range 0.64 to 0.78 dL g(-1) and 62,670 to 84,470 g mol(-1), respectively, indicating the formation of polymers of reasonably high molecular weight. It was easy to dissolve PEEK-NBs in common organic solvents such as chloroform, dichloromethane, and tetrahydrofuran. Tough, transparent, and flexible films of PEEK-NBs could be cast from chloroform solution. X-Ray diffraction studies indicated amorphous nature of PEEK-NBs. Glass transition temperature (T-g) values, determined by DSC analysis, of PEEK-NBs were in the range 163 to190 degrees C and T-g values increased with the increase in mol % of BPA-NB. The post-polymerization modification of a representative PEEK-NB was demonstrated using two azido compounds, namely, 4-(azidomethyl)-7-methoxy-2H-chromen-2-one and 9-(azidomethyl)anthracene, via metal-free azide-alkene 1,3-dipolar cycloaddition reaction to obtain copoly(ether ether ketone)s appended with coumarinyl and anthracenyl moieties, respectively.

10a(Co)poly(ether ether ketone)s10aazide-alkene click reaction10anorbornenyl groups10apost-polymerization modification1 aTalanikar, Aniket, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S. uhttps://library.ncl.res.in/content/norbornenyl-pendant-aromatic-copolyether-ether-ketones02939nas a2200145 4500008004100000245011700041210006900158260000800227490000700235520234800242100002102590700002502611700002802636856012902664 2023 eng d00aSynthesis, characterization and post-modification of aromatic (Co)polyesters possessing pendant maleimide groups0 aSynthesis characterization and postmodification of aromatic Copo cSEP0 v353 a

A new series of (co)polyesters possessing pendent maleimide groups was synthesized by low temperature solution polycondensation of 4, 4’-(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 0.50–0.76 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 464–468 and 142–178°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.

1 aJadhav, Uday, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/synthesis-characterization-and-post-modification-aromatic-copolyesters-possessing-pendant02012nas a2200253 4500008004100000022001400041245013600055210006900191260000900260300001200269490000700281520112100288653002301409653000601432653002401438653002001462653002301482653002401505100002601529700002501555700002801580700002701608856012301635 2024 eng d a1060-132500aAromatic (co)polycarbonates bearing pendant 2,3-dimethylmaleimido group based upon a new phthalimidine-containing "cardo" bisphenol0 aAromatic copolycarbonates bearing pendant 23dimethylmaleimido gr cOCT  a795-8040 v613 a

A new ``cardo'' bisphenol viz., 1-(2-(1,1-bis(4-hydroxyphenyl)-3-oxoisoindolin-2-yl)ethyl)-3,4-dimethyl- 1H-pyrrole-2,5-dione (PPH-MA) was synthesized in a two-step reaction sequence starting from phenolphthalein. PPH-MA was utilized as a step-growth monomer for the synthesis of a homo- and fourco-polycarbonates bearing pendant 2,3-dimethylmaleimido groups (PC-MAs) via solution polycondensation of PPH-MA or various mol % compositions of PPH-MA and bisphenol-A, respectively, with triphosgene.H-1 NMR spectroscopy confirmed the chemical structure and composition of PC-MAs. Inherent viscosity and number average molecular weight values of PC-MAs were in the range 0.45-0.64 dL g(-1) and 18,300 - 36,200 g mol(-1), respectively, indicating the formation of polymers of medium to reasonably high molecular weights. Tough, transparent and flexible films of PC-MAs could be cast from chloroform solution. X-ray diffraction studies indicated the amorphous nature of PC-MAs. The 10% weight loss temperature (T-10) values of PC-MAs were in the range 373-443 degrees C indicating their good thermal stability.

10a(co)polycarbonates10a210a3-dimethylmaleimido10aphenolphthalein10aphthalimidine ring10a``cardo'' bisphenol1 aTalanikar, Aniket, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S. uhttps://library.ncl.res.in/content/aromatic-copolycarbonates-bearing-pendant-23-dimethylmaleimido-group-based-upon-new01973nas a2200217 4500008004100000022001400041245013300055210006900188260000800257520111800265653002301383653002301406653003701429653003301466653001901499100002601518700002501544700002801569700002701597856013101624 2024 eng d a0954-008300aAromatic (Co)polycarbonates bearing pendant norbornenyl groups: Synthesis, characterization and post-polymerization modification0 aAromatic Copolycarbonates bearing pendant norbornenyl groups Syn cAUG3 a

A homo- and three co-polycarbonates (PC-NBs) bearing pendant norbornenyl groups were synthesized via solution polycondensation of triphosgene with 4, 4'-(bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) or various mol % compositions of BPA-NB and bisphenol-A, respectively. 1H-NMR spectroscopy confirmed the chemical structure and composition of PC-NBs. Inherent viscosity and number-average molecular weight (Mn) values of PC-NBs were in the range 0.44 - 0.64 dL g-1 and 21,800 - 34,100 g mol-1, respectively, indicating the formation of polymers of medium to reasonably high molecular weights. Tough, transparent, and flexible films of PC-NBs could be cast from chloroform solution. X-Ray diffraction studies indicated the amorphous nature of PC-NBs. Glass transition temperature (Tg) values, determined by DSC analysis, of PC-NBs were in the range 154 - 175 degrees C and Tg values increased with the increase in mol % of BPA-NB. The post-polymerization modification of a representative PC-NB was demonstrated using 3,6-diphenyl-1,2,4,5-tetrazine via tetrazine-ene reaction.

10a(co)polycarbonates10anorbornenyl groups10apost-polymerization modification10atetrazine-ene click reaction10athermoplastics1 aTalanikar, Aniket, A.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S. uhttps://library.ncl.res.in/content/aromatic-copolycarbonates-bearing-pendant-norbornenyl-groups-synthesis-characterization-and02477nas a2200301 4500008004100000022001400041245012900055210006900184260000800253300001100261490000800272520146800280653002901748653001301777653001801790653001601808653001401824653001401838653002301852100002201875700002301897700002601920700002301946700002501969700002601994700002802020856012702048 2024 eng d a0014-305700aCatechol- and phenolic hydroxyl-functionalized partially bio-based (Co) poly(ether sulfone)s with multifarious applicability0 aCatechol and phenolic hydroxylfunctionalized partially biobased  cNOV a1134840 v2203 a

A largely bio-based new bisphenol, namely, 4,4 `-((3,4-dimethoxyphenyl)methylene)-bis(2-methoxyphenol) (DMBM) was synthesized by the reaction of veratraldehyde with guaiacol. DMBM and varying compositions of DMBM and bisphenol A were polycondensed with bis(4-fluorophenyl) sulfone to afford reasonably high molecular weight film-forming (co)poly(ether sulfone)s possessing built-in methoxyl groups. T10 and Tg values of (co)poly(ether sulfone)s were in the range 382-478 degrees C and 171-187 degrees C, respectively indicating their good thermal stability and the values decreased with increase in mol % incorporation of DMBM. The methoxyl groups present in (co)poly (ether sulfone)s were quantitatively de-blocked resulting in the formation of corresponding polymers possessing pendant catechol moieties and free phenolic hydroxyl groups. By virtue of the presence of these functional moieties, (co)poly(ether sulfone)s are amenable for post-polymerization modifications, and exhibited properties such as antimicrobial (23 mm against Staphylococcus aureus and 18 mm against Escherichia coli)), antioxidant (72 % scavenger of free radicals), adhesive (2.24 MPa lap shear strength) and usefulness as redox-active agent in zinc-ion batteries. These data underscore the promise of DMBM as a versatile monomer of wider utility for the synthesis of functional (co)poly(ether sulfone)s capable of expanding their applicability beyond the conventional ones.

10a(Co)poly(ether sulfone)s10aadhesive10aAntimicrobial10aAntioxidant10abio-based10abisphenol10aZinc-ion batteries1 aWale, Apparav, K.1 aJagtap, Ashish, S.1 aPandey, Priyanshi, R.1 aDastager, Syed, G.1 aShelke, Manjusha, V.1 aAmbade, Ashootosh, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/catechol-and-phenolic-hydroxyl-functionalized-partially-bio-based-co-polyether-sulfones01897nas a2200205 4500008004100000245011300041210006900154260000800223300001100231490000600242520113500248100002701383700002501410700002701435700002501462700002801487700002601515700002201541856012801563 2025 eng d00aDevelopment of reversed-phase HPLC method for purity assessment of aryl porphyrins and their metal complexes0 aDevelopment of reversedphase HPLC method for purity assessment o cMAY ae700580 v83 a

A gradient reversed-phase HPLC method was developed for in-process monitoring of the formation of aryl porphyrins and their corresponding metallo-aryl porphyrins. The method also proved effective for determining their quantitative purity. Optimal results achieving proper peak shape and separation of peaks in the chromatogram were obtained using C8 column and gradient of acetic acid-water and acetonitrile. The detector wavelength was selected for simultaneous detection of starting materials and products for in-process analysis for conversion of aryl aldehydes to corresponding tetraaryl porphyrins at 254 nm and metallo-aryl porphyrins formation from tetraaryl porphyrin at 413 nm, respectively; while the purity of products could be determined at 413 nm. The developed method is efficient, versatile, accurate, and easy to carry out and could serve as a handy tool for the reaction monitoring and determination of purity in the processes development of synthetic porphyrins and metalloporphyrins.

1 aUjagare, Ashish, Mohan1 aUzagare, Matthew, C.1 aGhogare, Bhausaheb, N.1 aGupta, Lokesh, Kumar1 aWadgaonkar, Prakash, P.1 aPatil, Vishwanath, R.1 aDonde, Kamini, J. uhttps://library.ncl.res.in/content/development-reversed-phase-hplc-method-purity-assessment-aryl-porphyrins-and-their-metal02385nas a2200205 4500008004100000022001400041245012300055210006900178260000800247300001600255490000700271520162000278100002601898700002101924700002501945700002801970700002701998700002502025856012902050 2025 eng d a2050-750X00aInfluence of hydrophilic/hydrophobic diols on the properties of polyurethane hydrogels: solvent-free one-pot synthesis0 aInfluence of hydrophilichydrophobic diols on the properties of p cSEP a11010-110190 v133 a

Herein, we report the design and synthesis of bio-degradable porous polyurethane hydrogels by a green, solvent-free, one-pot technique that can withstand physiological mechanical loads and aid in tissue regeneration. The hydrophilic/hydrophobic nature of the hydrogel was tuned using diols such as polycaprolactone diol (PCL) and polycarbonate diol (PCD), in combination with polyethylene glycol (PEG, MW approximate to 4000 g mol-1), 4,4 `-methylene bis(cyclohexyl isocyanate) (H12MDI) and hexanetriol (HT), which served as crosslinking agents. The structural characterizations of the hydrogels were performed using FT-IR as well as 1H and 13C high resolution magic angle spinning nuclear magnetic resonance (HR-MAS) spectroscopy. The utilization of various diols in the synthesis of the hydrogels enabled precise control over crystallinity, pore sizes, and customization of mechanical and degradation properties. These hydrogels exhibited tensile strength in the range of 0.22-1.48 MPa, while their compressive strength varied from 0.92 to 29.3 MPa. In vitro degradation profiles in the presence and absence of the enzyme Amano lipase PS revealed that the degradation process is contingent upon the specific diol present in the hydrogel. Furthermore, preliminary in vitro biological experiments confirmed the biocompatibility of the gels, indicating their potential as suitable substrates for drug delivery applications. This diverse library of gels can be shaped into specific forms, highlighting their promising applications as scaffolds and implants in drug delivery systems and tissue engineering.

1 aDivakaran, Anumon, V.1 aNair, Sanoop, B.1 aKarambe, Shivani, S.1 aWadgaonkar, Prakash, P.1 aNair, Kiran, Sukumaran1 aBadiger, Manohar, V. uhttps://library.ncl.res.in/content/influence-hydrophilichydrophobic-diols-properties-polyurethane-hydrogels-solvent-free-one02361nas a2200289 4500008004100000022001400041245014100055210006900196260000800265300001100273490000800284520134700292653002501639653001401664653002601678653003001704653002701734653002001761653002601781100002201807700002201829700002001851700002101871700002201892700002801914856012901942 2025 eng d a1381-514800aMethoxyl-containing hyper-crosslinked polymer from largely bio-based biphenyl methyl ether and its application in lithium-sulfur battery0 aMethoxylcontaining hypercrosslinked polymer from largely biobase cFEB a1061390 v2073 a

A new biphenyl methyl ether viz 2,2 `,3,3 `-tetramethoxy-5,5 `-bis(methoxymethyl)-1,1 `-biphenyl (TBMB) was synthesized starting from vanillin via three-step reaction sequence. The self-polycondensation of TBMB by employing two Bronsted acid catalysts, viz, p- toluenesulfonic acid (PTSA) and trifluoromethanesulfonic acid (TFSA) led to the formation of organic hyper-crosslinked polymers (HCPs) containing built-in methoxyl groups. HCPs were characterized by FTIR, solid state 13 C NMR, XPS, XRD, TGA, BET, and FESEM analysis techniques. HCPs synthesized using PTSA (HCP-PTSA) and TFSA (HCP-TFSA) exhibited a Brunauer-Emmett-Teller (BET) surface area of 480 +/- 5 and 590 +/- 4 m2/g, respectively and consisted of hierarchical pore structures with both micropores and mesopores. HCP-TFSA was evaluated as an active coating layer on conventional polypropylene (PP) separator in lithium-sulfur batteries to suppress the polysulfide shuttling on account of the ability of methoxyl groups to anchor soluble polysulfide species via coordination. The significant polysulfide adsorption capacity and improved cycling stability with a capacity of 617.2 mAh g- 1 at 0.5C and 99% capacity retention highlighted the potential of porous HCP containing built-in methoxyl groups in the development of attractive lithium-sulfur battery systems.

10aActive coating layer10abio-based10aBiphenyl methyl ether10aHyper-crosslinked polymer10alithium-sulfur battery10aMethoxyl groups10aSelf-polycondensation1 aWale, Apparav, K.1 aDas, Anoushka, K.1 aPatil, Nita, R.1 aShelke, Manjusha1 aAmbade, Ashootosh1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/methoxyl-containing-hyper-crosslinked-polymer-largely-bio-based-biphenyl-methyl-ether-and02074nas a2200241 4500008004100000022001400041245009200055210006900147260000800216300001200224490000700236520121300243653002801456653003801484653003301522653002301555100002601578700002101604700002501625700002801650700002701678856012701705 2026 eng d a0954-008300aSynthesis and characterization aromatic copolyesters bearing pendant norbornenyl groups0 aSynthesis and characterization aromatic copolyesters bearing pen cMAY a254-2630 v383 a

4, 4'-(Bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) was polymerized via phase transfer catalyzed interfacial polycondensation with an equimolar mixture (50:50 mol %) of isophthaloyl chloride (IPC) and terephthaloyl chloride (TPC) to obtain aromatic copolyester bearing pendant norbornenyl groups (PES-NB). Furthermore, three different compositions of BPA-NB and bisphenol A (BPA) were polycondensed with IPC to obtain a series of copolyesters. 1H NMR spectroscopy confirmed the chemical structure and compositions of PES-NBs. Inherent viscosity and number-average molecular weight values of PES-NBs were in the range 0.82 to 1.06 dLg-1 and 63,600 to 95,300 gmol-1, respectively, indicating the formation of polymers of reasonably high molecular weights. PES-NBs readily dissolved in common organic solvents such as chloroform, dichloromethane, and tetrahydrofuran, and tough, transparent, flexible films could be cast from their chloroform solutions. X-Ray diffraction studies indicated amorphous nature of PES-NBs. Glass transition temperature (Tg) values of PES-NBs were in the range 215 to 195 degrees C and Tg values increased with the increase in mol % of BPA-NB.

10aaromatic (co)polyesters10aglass-transition temperature (Tg)10ainterfacial polycondensation10anorbornenyl groups1 aTalanikar, Aniket, A.1 aBhong, Sahil, T.1 aNagane, Samadhan, S.1 aWadgaonkar, Prakash, P.1 aRashinkar, Gajanan, S. uhttps://library.ncl.res.in/content/synthesis-and-characterization-aromatic-copolyesters-bearing-pendant-norbornenyl-groups02136nas a2200229 4500008004100000022001400041245012600055210006900181260000800250300001000258490000700268520133600275653002401611653001401635653001401649653001301663653002301676100002201699700002601721700002801747856013101775 2026 eng d a1060-132500aUtilization of bisphenol based on lignin-derived chemicals for the synthesis of partially bio-based aromatic copolyesters0 aUtilization of bisphenol based on ligninderived chemicals for th cJAN a83-900 v633 a

New aromatic copolyesters were synthesized by phase-transfer catalyzed interfacial polycondensation of 4,4 `-((3,4-dimethoxyphenyl)methylene)bis(2-methoxyphenol) (DMBM) with isophthaloyl chloride (IPC) and a mixture of (50:50 mol %) IPC and terephthaloyl chloride (TPC). Additionally, a series of copolyesters was synthesized by polycondensation of varying compositions of DMBM and bisphenol A with IPC. Copolyesters exhibited inherent viscosity and Mn values in the range 0.59-0.98 dL/g and 15,840-49,460 g/mol, respectively, indicating formation of reasonably high molecular weight polymers. Copolyesters could be cast into tough, transparent and flexible films from chloroform solution. UV-vis measurements on films gave values of T400, T450 and cut-off wavelength in the range 80-84 %, 83-89 % and 324-334 nm, respectively. The formation of random copolyesters was evidenced by 13C NMR spectroscopic studies. Copolyesters exhibited good thermal stability with 10% weight loss temperature in the range 391-438 degrees C. The Tg values of copolyesters were in the range 162-180 degrees C and Tg values decreased with an increase in mol% content of DMBM. Copolyesters exhibited tensile strength, Young's modulus and elongation at break values in the range 83.55-70.68 MPa, 2.11-1.31 GPa and 10.52-5.45 %, respectively.

10aAromatic polyesters10abio-based10abisphenol10amethoxyl10aThermal properties1 aWale, Apparav, K.1 aAmbade, Ashootosh, V.1 aWadgaonkar, Prakash, P. uhttps://library.ncl.res.in/content/utilization-bisphenol-based-lignin-derived-chemicals-synthesis-partially-bio-based-aromatic02113nas a2200289 4500008004100000022001400041245009600055210006900151260000900220300001400229490000700243520115400250653001501404653001301419653002401432653002601456653003001482653002301512100001801535700002501553700003501578700002801613700002301641700001801664700002301682856011801705 2026 eng d a2642-415000aViscoelastic behaviors of hyaluronic derivatives as a function of pH, salt, and temperature0 aViscoelastic behaviors of hyaluronic derivatives as a function o cMAR  a1505-15170 v643 a

Hyaluronic acid and its derivatives are essential polysaccharides widely used in the bio-medical field for their applications in tissue engineering and controlled drug delivery. By revisiting the wide variety of rheological behavior of aqueous hyaluronan solutions as a function of pH, we develop in this work a comparative study between solutions of native hyaluronan (HA) and its derivative (HA-PEPO) obtained by grafting onto thermoresponsive side-chains of poly(ethylene oxide-co-propylene oxide) characterized by a phase transition around body temperature. Based on a large dataset obtained at a fixed polymer concentration, by changing either the chemical composition of the chain and/or the environmental conditions (pH, temperature, added salt), we show that the viscoelastic properties of hyaluronan solutions can be controlled over more than three decades of amplitude with the possibility to get either liquid or gel states, regardless of temperature, as well as sol/gel transitions induced by cooling or heating by the interplay between hydrogen bonds, hydrophobic interactions, and cation binding induced by potassium salts.

10ahyaluronan10aHydrogel10apH-induced gelation10asalt-induced gelation10athermoresponsive polymers10atissue engineering1 aKadam, Yogesh1 aBadiger, Manohar, V.1 aRajamohanan, Pattuparambil, R.1 aWadgaonkar, Prakash, P.1 aDucouret, Guylaine1 aMerland, Theo1 aHourdet, Dominique uhttps://library.ncl.res.in/content/viscoelastic-behaviors-hyaluronic-derivatives-function-ph-salt-and-temperature