02098nas a2200217 4500008004100000022001400041245009400055210006900149260007300218300001200291490000700303520124600310653004801556653002101604653002401625653003001649100003001679700002201709700002801731856012101759 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. uhttp://library.ncl.res.in/content/new-atrp-initiator-synthesis-cyclic-carbonate-terminated-polymethyl-methacrylate-002809nas a2200253 4500008004100000022001400041245009500055210006900150260007600219300001400295490000800309520192100317653000602238653001902244653002802263653001502291653001102306653001902317653002202336100002102358700002202379700002802401856012602429 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. uhttp://library.ncl.res.in/content/new-poly134-oxadiazoles-bearing-pentadecyl-side-chains-synthesis-and-characterization-002332nas a2200241 4500008004100000022001400041245011800055210006900173260008700242300001200329490000700341520139100348653003001739653002101769653001401790653002601804653003101830100002801861700002201889700002101911700002801932856013001960 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. uhttp://library.ncl.res.in/content/new-organosoluble-aromatic-polyesterimides-containing-pendent-pentadecyl-chains-synthesis-001350nas a2200193 4500008004100000022001400041245016800055210006900223260011000292300001600402490000600418520048800424100002500912700002000937700002200957700002700979700002801006856012201034 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. uhttp://library.ncl.res.in/content/nickel-ferrite-nanoparticles-hydrogen-peroxide-green-catalyst-oxidant-combination-002409nas a2200229 4500008004100000022001400041245015500055210006900210260006700279300001200346490000700358520145600365653004101821653004401862653002501906653002001931653002901951100002201980700002202002700002802024856012702052 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. uhttp://library.ncl.res.in/content/new-atom-transfer-radical-polymerization-initiator-based-phenolphthalein-synthesis-bis-001277nas a2200217 4500008004100000022001400041245013000055210006900185260010600254300001200360490000700372520038800379653002100767653002600788653002400814653002600838100002300864700002100887700002800908856012300936 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. uhttp://library.ncl.res.in/content/new-polyether-urethanes-based-lignin-derived-aromatic-chemicals-b-monomer-approach-001785nas a2200253 4500008004100000245015000041210006900191260000800260300001600268490000700284520089200291100002401183700001701207700002401224700001601248700001901264700002001283700001401303700001801317700001701335700002001352700002801372856013101400 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. uhttp://library.ncl.res.in/content/new-pyrene-cored-small-organic-molecule-flexible-alkyl-spacer-potential-solution-processable02594nas a2200241 4500008004100000022001400041245016600055210006900221260000900290300001200299490000700311520166800318653004801986653002702034653003802061653002102099653001602120100001902136700002802155700002102183700002602204856012202230 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. uhttp://library.ncl.res.in/content/new-approach-synthesis-miktoarm-star-polymers-through-combination-thiol-epoxy-click02464nas a2200253 4500008004100000022001400041245010100055210006900156260000900225300001400234490000700248520158800255653002701843653001601870653002001886653002601906100002201932700002501954700002101979700002502000700002602025700002802051856013102079 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. uhttp://library.ncl.res.in/content/new-cardo-bisphenol-monomer-containing-pendant-azido-group-and-resulting-aromatic-polyesters02312nas a2200229 4500008004100000022001400041245006300055210005800118260000900176300001200185490000700197520155300204653003401757653003201791653002301823653003701846100002601883700002501909700002801934700002701962856009301989 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. uhttp://library.ncl.res.in/content/norbornenyl-pendant-aromatic-copolyether-ether-ketones