@article { ISI:000285326300001, title = {New ATRP initiator for synthesis of cyclic carbonate-terminated poly(methyl methacrylate)}, journal = {Reactive \& Functional Polymers}, volume = {70}, number = {12}, year = {2010}, month = {DEC}, pages = {931-937}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

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

}, keywords = {Atom transfer radical polymerization (ATRP), cyclic carbonate, functional polymers, poly(methyl methacrylate)}, issn = {1381-5148}, doi = {10.1016/j.reactfunctpolym.2010.08.005}, author = {Palaskar, Dnyaneshwar V. and Sane, Prakash S. and Wadgaonkar, Prakash P.} } @article { ISI:000298672800047, title = {New poly(1,3,4-oxadiazole)s bearing pentadecyl side chains: synthesis and characterization}, journal = {Journal of Applied Polymer Science}, volume = {124}, number = {2}, year = {2012}, month = {APR}, pages = {1281-1289}, publisher = {WILEY-BLACKWELL}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

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

}, keywords = {3, 4-oxadiazole)s, Cashew nut shell liquid, pentadecyl, poly(1, polyhydrazides, thermal stability}, issn = {0021-8995}, doi = {10.1002/app.34682}, author = {More, Arvind S. and Menon, Shamal K. and Wadgaonkar, Prakash P.} } @article { ISI:000325924000001, title = {New organosoluble aromatic poly(esterimide)s containing pendent pentadecyl chains: synthesis and characterization}, journal = {High Performance Polymers}, volume = {25}, number = {7}, year = {2013}, month = {NOV}, pages = {735-743}, publisher = {SAGE PUBLICATIONS LTD}, address = {1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND}, abstract = {

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

}, keywords = {pendent pentadecyl chains, Polycondensation, Polyimide, Preformed imide rings, Thermogravimetric analysis}, issn = {0954-0083}, doi = {10.1177/0954008313483344}, author = {Sadavarte, Nilakshi V. and Patil, Sachin S. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article { ISI:000341363200040, title = {Nickel ferrite nanoparticles-hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides}, journal = {RSC Advances}, volume = {4}, number = {69}, year = {2014}, month = {JUL}, pages = {36702-36707}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

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

}, issn = {2046-2069}, doi = {10.1039/c4ra04095c}, author = {Kulkarni, Aparna M. and Desai, Uday V. and Pandit, Kapil S. and Kulkarni, Makarand A. and Wadgaonkar, Prakash P.} } @article { ISI:000349401200012, title = {New atom transfer radical polymerization initiator based on phenolphthalein for the synthesis of bis-allyloxy functionalized polystyrene macromonomers}, journal = {Polymer International}, volume = {64}, number = {3}, year = {2015}, month = {MAR}, pages = {413-420}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

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

}, keywords = {atom transfer radical polymerization, bis-allyloxy functionalized polystyrene, functional initiator, phenolphthalein, thiol-ene click reaction}, issn = {0959-8103}, doi = {10.1002/pi.4804}, author = {Patil, Sachin S. and Menon, Shamal K. and Wadgaonkar, Prakash P.} } @article { ISI:000362603800044, title = {New poly(ether urethane)s based on lignin derived aromatic chemicals via A-B monomer approach: synthesis and characterization}, journal = {European Polymer Journal}, volume = {71}, year = {2015}, month = {OCT}, pages = {547-557}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

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

}, keywords = {A-B type monomer, Poly(ether urethane)s, Renewable resources, Self-polycondensation}, issn = {0014-3057}, doi = {10.1016/j.eurpolymj.2015.08.021}, author = {Kuhire, Sachin S. and Avadhani, C. V. and Wadgaonkar, Prakash P.} } @article {43940, title = {New pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence}, journal = {New Journal of Chemistry}, volume = {41}, year = {2017}, month = {OCT}, pages = {11383-11390}, type = {Article}, abstract = {A new pyrene cored small organic molecule viz. 1,3,6,8-tetrakis(4-((5-(9H-carbazol-9-yl) pentyl)oxy) phenyl)pyrene (PY-II) was designed and synthesized. The carbazole moiety with an alkyl spacer was introduced at 1, 3, 6 and 8 positions of the pyrene core to improve the charge transport properties and solution processability. PY-II exhibited excellent solubility in common organic solvents and high thermal stability up to 345 degrees C. The photoluminescence quantum yield (PLQY) of PY-II in solution was found to be 0.9 with bright blue emission near 450 nm which is just appropriate for the human eye. The solution processed non-doped OLED device fabricated using PY-II as an emissive layer afforded a pure blue emission with CIE coordinates of 0.16 and 0.16, a power efficiency of 0.17 lm W-1, a maximum current efficiency of 0.41 cd A(-1) and a maximum brightness of 202 cd m(-2).}, doi = {10.1039/c7nj01921a}, author = {Valsange, Nitin G. and Wong, F. L. and Shinde, Durgaprasad and Lee, C. S. and Roy, V. A. L. and Manzhos, Sergei and Feron, K. and Chang, Samuel and Katoh, Ryuzi and Sonar, Prashant and Wadgaonkar, Prakash P.} } @article {45509, title = {New approach for the synthesis of miktoarm star polymers through a combination of thiol-epoxy {\textquoteleft}{\textquoteleft}click{\textquoteright}{\textquoteright} chemistry and ATRP/Ring-opening polymerization techniques}, journal = {Journal of Polymer Science Part A-Polymer Chemistry}, volume = {57}, year = {2019}, month = {JAN }, pages = {146-156}, type = {Article}, abstract = {

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

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

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

}, keywords = {aromatic (co)polyester, azido group, cardo bisphenol, Chemical modification}, issn = {0887-624X}, doi = {10.1002/pola.29414}, author = {Maher, Deepak M. and Nagane, Samadhan S. and Jadhav, Uday A. and Salunkhe, Pravin H. and Tawade, Bhausaheb V. and Wadgaonkar, Prakash P.} } @article {48947, title = {Norbornenyl-pendant aromatic (co)poly(ether ether ketone)s}, journal = {Journal of macromolecular science part A- pure and applied chemistry}, volume = {60}, year = {2023}, month = {NOV }, pages = {790-800}, type = {Journal Article}, abstract = {

4, 4{\textquoteright}-(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{\textquoteright}-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.

}, keywords = {(Co)poly(ether ether ketone)s, azide-alkene click reaction, norbornenyl groups, post-polymerization modification}, issn = {1060-1325}, doi = {10.1080/10601325.2023.2261462}, author = {Talanikar, Aniket A. and Nagane, Samadhan S. and Wadgaonkar, Prakash P. and Rashinkar, Gajanan S.} }