01343nas a2200157   4500008004100000245011200041210006900153260000800222300001200230490000800242520072900250100002600979700002601005700002401031856013001055       2016                        eng d00aEffect of heterocycles on field-effect transistor performances of donor-acceptor-donor type small molecules0 aEffect of heterocycles on fieldeffect transistor performances of  cSEP  a107-1130 v6613 aTwo D-A-D small molecules comprising triphenylamine and diketopyrrolopyrrole were synthesized having either furan or thiophene connected to the fused lactam ring. In this design, furan/thiophene diketopyrrolopyrrole acts as an acceptor and triphenylamine acts as a donor. Propeller shaped triphenylamine has its effect on packing, processability and plays a vital role in determining the pi-pi molecular orbital stacking in such compounds and thus the mobility of charge carriers. With TDPPT and FDPPT, maximum hole carrier mobility obtained is 2.88 x 10(-3) cm(2) V-1 s(-1) and 1.60 x 10(-3) cm(2) V-1 s(-1), respectively using bottom gate bottom contact field-effect transistor. (C) 2016 Elsevier B.V. All rights reserved.1 aChini, Mrinmoy, Kumar1 aMahale, Rajashree, Y.1 aChatterjee, Shyambo  uhttps://library.ncl.res.in/content/effect-heterocycles-field-effect-transistor-performances-donor-acceptor-donor-type-small-001372nas a2200157   4500008004100000245014500041210006900186260000800255300001000263490000800273520073200281100002601013700001901039700002401058856013201082       2016                        eng d00aF and CF3 substituted solution processable oligo para-phenylenevinylene for ambipolar and hole-transporting organic field effect transistors0 aF and CF3 substituted solution processable oligo paraphenylenevi  cJUL  a26-320 v6573 aWe have synthesized benzotrifluoromethyl group substituted para-phenylenevinylene oligomer (denoted as PI) and a cooligomer (denoted as PII) by Gilch polymerization route. The ambipolar field-effect transistor (FET) material PI shows hole and electron mobility 1 x 10 (4) cm(2) V (1) s (1) and 2 x 10 (5) cm(2) V (1) s (1) respectively. PII shows only hole mobility as high as 0.05 cm(2) V (1) s (1) as p-type material. This work highlights the progress of hole-transporting as well as ambipolar material for para-phenylenevinylene derivatives. The results are enlightened on the basis of presence of electronegative substituents and structural modification of the oligomer backbone. (C) 2016 Elsevier B.V. All rights reserved.1 aChini, Mrinmoy, Kumar1 aDas, Chayanika1 aChatterjee, Shyambo  uhttps://library.ncl.res.in/content/f-and-cf3-substituted-solution-processable-oligo-para-phenylenevinylene-ambipolar-and-hole-001270nas a2200133   4500008004100000245013200041210006900173260000800242490000800250520070600258100002600964700002400990856012201014       2017                        eng d00aEffect of side-chain functionality on the organic field-effect transistor performance of oligo(p-phenylenevinylene) derivatives0 aEffect of sidechain functionality on the organic fieldeffect tra  cJUN0 v1343 aIn order to observe the effects of the substitution of electronegative flourine with aromatic groups in oligo(p-phenylenevinylene) compounds on their packing, morphology, and charge carrier mobility, we have synthesized napthol-substituted oligo(p-phenylenevinylene) compounds and examined their solubility, redox properties, thin film morphologies, and charge carrier properties. To date, very few examples of conjugated oligomers bearing napthol side groups have been reported in the literature. After annealing at 150 degrees C, the mobility of S1, S2, and S3 was 4.0x10(-2) cm(2) V-1 s(-1), 1.2x10(-2) cm(2) V-1 s(-1), and 2.6x10(-3) cm(2) V-1 s(-1), respectively. (c) 2017 Wiley Periodicals, Inc.1 aChini, Mrinmoy, Kumar1 aChatterjee, Shyambo  uhttps://library.ncl.res.in/content/effect-side-chain-functionality-organic-field-effect-transistor-performance-oligop01593nas a2200145   4500008004100000245010200041210007100143260000800214300000800222490000600230520102200236100002601258700002401284856013901308       2017                        eng d00aHydrothermally reduced nano porous graphene–polyaniline nanofiber composites for supercapacitor0 aHydrothermally reduced nano porous graphene–polyaniline nanofibe  cJAN  a1-50 v13 aHydrothermally reduced porous graphene (PGs) and polyaniline (PANI) nanofiber composites (PGs?PANI) were prepared by interfacial polymerization of aniline in the presence of reduced porous graphene (PGs) under acidic conditions. Hydrothermal reduction of graphene oxide (GO) produced graphene quantum dots (GQDs) along with porous reduced graphene (PGs). The removal of nano sized GQDs generate several round shaped edges in the graphene, which facilitated improved charge storage. In addition to preparation of porous graphene, we developed an approach to process the PGs. We envisioned preparing conjugated polymer as processing material. The capacitive behavior of PGs was characterized using cyclic voltammetry (CV) and galvanostatic charge?discharge (GCD) techniques. The specific capacitance of hydrothermally reduced GO (PGs) and PGs?PANI composites was 185 F/g and 357 F/g at 0.1 A/g in 1 M H2SO4 electrolyte. The energy density of PGs?PANI composite was obtained 49.58 W h/kg at a power density of 71.8 W/kg.1 aChini, Mrinmoy, Kumar1 aChatterjee, Shyambo  uhttps://library.ncl.res.in/content/hydrothermally-reduced-nano-porous-graphene%E2%80%93polyaniline-nanofiber-composites-supercapacitor01916nas a2200193   4500008004100000245010800041210006900149260000800218300001400226490000700240520121800247100001701465700002401482700002001506700002301526700002801549700002501577856012001602       2018                        eng d00aSoluble polybenzimidazoles with intrinsic porosity: synthesis, structure, properties and processability0 aSoluble polybenzimidazoles with intrinsic porosity synthesis str  cMAY  a1046-10570 v563 aWe have explored two novel comonomers, namely, 4,16-dicarboxyl[2.2]paracyclophane and 5,5,6,6-tetraamino-3,3,3,3-tetramethyl-1,1-spirobi[indane], for the synthesis of co-polybenzimidazoles (co-PBIs) with intrinsic porosity. Both these monomers possess twisted structures that can lead to awkward macromolecular shapes that cannot pack efficiently. The consequences of introducing these two monomers on the structure and properties of PBIs are reported. The random copolymers synthesized are amorphous and possess glass transition temperatures (T(g)s) greater than 400 degrees C. T-g decreases with increasing comonomer content indicating an increase in fractional free volume. The copolymers have low surface area. TEM and BET measurements show evidence of mesopore formation. The copolymers show significant carbon dioxide adsorption. Single chain molecular dynamics simulation of 24-mer repeat units shows intramolecular void spaces arising as a result of distorted polymer chain with reduced conformational mobility. These studies define a new synthetic strategy for bottoms-up synthesis of PBIs with intrinsic porosity. (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1046-10571 aKumar, Vikas1 aChatterjee, Shyambo1 aSharma, Pragati1 aChakrabarty, Suman1 aAvadhani, Chilukuri, V.1 aSivaram, Swaminathan  uhttps://library.ncl.res.in/content/soluble-polybenzimidazoles-intrinsic-porosity-synthesis-structure-properties-and