02506nas 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-and01786nas 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-processable02628nas 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-multiple