Synthesis and Characterization of π-Conjugated Polymers Based on 2-arylbenzimidazole and 4,7-di-thiophene-2-yl-4,5,6,7-tetrahydro-benzo[1,2,5]thiadiazole

A newly designed 2-arylbenzimidazole derivative which plays a role of co-acceptor unit has been prepared for the synthesis of conjugated polymer. 2-arylbenzimidazole derivative has been incorporated into 4,7-dithiophen-2-yl-benzo(2,1,3)thiadiazole (TBT) and fluorene based alternating copolymers with...

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Bibliographic Details
Published in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 2013-01, Vol.581 (1), p.31-37
Main Authors: Do, Thu Trang, Bae, Jun Huei, Yoo, Seong Il, Lim, Kwon Taek, Woo, Han Young, Kim, Joo Hyun
Format: Article
Language:English
Subjects:
2-arylbenzimidazole
benzothiadiazole
conjugated polymer
Copolymers
Crystals
Derivatives
Energy levels
Liquid crystals
low band gap
Physical properties
Polymers
Synthesis
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Summary:A newly designed 2-arylbenzimidazole derivative which plays a role of co-acceptor unit has been prepared for the synthesis of conjugated polymer. 2-arylbenzimidazole derivative has been incorporated into 4,7-dithiophen-2-yl-benzo(2,1,3)thiadiazole (TBT) and fluorene based alternating copolymers with different ratios of 5 mol.% and 10 mol.% named POFTBT-IMD5, POFTBT-IMD10, respectively. We also synthesized alternating copolymer of 9,9-dioctylfluorene and TBT (POFTBT) to compare physical properties. POFTBT-IMD5, POFTBT-IMD10 films showed absorption peaks at 559 and 555 nm, respectively. The HOMO and LUMO energy levels of POFTBT-IMD5, POFTBT-IMD10 were −5.4/−3.84 eV and −5.4/−3.81 eV, respectively, which were similar to those of POFTBT (−5.3/−3.7 eV).
ISSN:1542-1406
1563-5287
DOI:10.1080/15421406.2013.808145