01989nas a2200229   4500008004100000245012500041210006900166260000800235300001200243490000800255520117600263100001801439700001601457700001601473700003001489700002001519700002301539700002401562700002101586700002101607856013101628       2016                        eng d00aRole of acceptor strength on OFET properties of small molecular organic semiconducting materials with D-A-D architecture0 aRole of acceptor strength on OFET properties of small molecular   cOCT  a236-2460 v2203 aTwo organic semiconducting materials 2,5-didodecyl-3,6-bis(4-(11-dodecyl-11H-benzo[a]carbazol-8yl)phenyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione. (BCDPP) and 1,5-didodecyl-3,7-bis(4-(11-dodecyl-11H-benzo[a]carbazol-8-yl)phenyl)dipyrrolo[3,2-b:3',2'-e]pyrazine-2,6(1H,5H)-dione (BCPzDP) with D-A-D architecture have been designed, synthesized and well characterized. Both the materials have benzocarbazole donor end-capping units. While BCDPP contains well explored diketopyrrolopyrrole (DPP), BCPzDP possesses electron deficient dipyrrolopyrazinedione (PzDP) as acceptor moiety. The importance of the nature of acceptor moiety in tuning the charge transport properties of the synthesized materials is explored. Thermal, photo-physical and electrochemical properties of these materials are measured and solution processed OFETs are fabricated. OFETs with BCDPP show unipolar p-type semiconducting properties with hole mobility of 1.02 x 10(-4) cm(2) V-1 s(-1) and OFETs of BCPzDP exhibit ambipolar charge transport behaviour with optimal saturation hole and electron mobilities of 0.0054 and 0.0013 cm(2) V-1 s(-1), respectively. (C) 2016 Elsevier B.V. All rights reserved.1 aSasikumar, M.1 aBharath, D.1 aKumar, Siva1 aChereddy, Narendra, Reddy1 aChithiravel, S.1 aKrishnamoorthy, K.1 aShanigaram, Balaiah1 aBhanuprakash, K.1 aRao, Jayathirtha  uhttps://library.ncl.res.in/content/role-acceptor-strength-ofet-properties-small-molecular-organic-semiconducting-materials-d-d02312nas a2200277   4500008004100000022001400041245010400055210006900159260000800228300001200236490000700248520139100255653002301646653002701669653002101696653002901717653000901746653001801755653002901773653003001802100001501832700001901847700002001866700001701886856013101903       2017                        eng d  a0887-624X00aLiquid crystalline supramolecular crosslinked polymer complexes of ditopic rylenebisimides and P4VP0 aLiquid crystalline supramolecular crosslinked polymer complexes   cMAR  a951-9590 v553 a<p>Perylenebisimide and naphthalenebisimide (PBIPDP and NBI-PDP) end functionalized with pentadecyl phenol is designed as ditopic hydrogen bonding acceptors to form supramolecular crosslinked network with poly(4-vinyl pyridine) (P4VP). The pristine PBI-PDP has been grown as single crystals from DCM-MeOH (dichloromethane-methanol) mixture at room temperature, which revealed a P21 space group. Noticeably, the pentadecyl alkyl chain shields the aromatic perylene core on both sides resulting in the absence of p-p interaction in single-crystal assembly. The naphthalenebisimide derivative exhibits thermotropic liquid crystalline behavior, while both the molecules exhibits lyotropic liquid crystalline phases in tetrahydrofuran (THF), which were characterized using a combination of differential scanning calorimeter, X-ray diffraction, and polarized light microscopy. The hydrogen-bonded complex of both the rylenebisimides with P4VP preserves the mesomorphic properties in THF. The electron transport mobility measured by space charge limited current measurements reveals a two orders of magnitude increase in the charge transport in the P4VP complex compared to that of the pristine molecule. The average electron mobility obtained is mu(e, avg): 10(-3) cm(2)/Vs for P4VP-PBI compared to mu(e, avg): 10(-5) cm(2)/Vs for pristine PBI derivative. (C) 2017 Wiley Periodicals, Inc.</p>10acrystal structures10aditopic rylenebisimide10ahydrogen bonding10alyotropic liquid crystal10aP4VP10aSelf-assembly10asupramolecular crosslink10asupramolecular structures1 aSaibal, B.1 aNarayan, Rekha1 aChithiravel, S.1 aAsha, S., K.  uhttps://library.ncl.res.in/content/liquid-crystalline-supramolecular-crosslinked-polymer-complexes-ditopic-rylenebisimides-and