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Open AccessArticle

Liquid Crystalline π-Conjugated Copolymers Bearing a Pyrimidine Type Mesogenic Group

Institute of Materials Science, Graduate School of Pure and Applied Sciences / University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
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Materials 2009, 2(1), 22-37; https://doi.org/10.3390/ma2010022
Received: 9 December 2008 / Accepted: 12 January 2009 / Published: 16 January 2009
(This article belongs to the Special Issue Liquid Crystals)
Phenylene-thiophene-based liquid crystalline π-conjugated copolymers bearing mesogenic groups as side chains were synthesized via a Stille polycondensation reaction and confirmed to exhibit a nematic liquid crystal phase at appropriate temperatures. The formation of a nematic phase, but not a smectic phase indicates cooperation of the main chain and side chain in the formation of a nematic main-chain/side-chain liquid crystal phase. The generation of polarons in the main chain as charge carriers during in-situ vapor doping of iodine is confirmed to increase with a doping progresses, exhibiting Dysonian paramagnetic behavior typical of conductive polymers. View Full-Text
Keywords: Liquid crystal; conductive polymer; electron spin resonance Liquid crystal; conductive polymer; electron spin resonance
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Kawabata, K.; Goto, H. Liquid Crystalline π-Conjugated Copolymers Bearing a Pyrimidine Type Mesogenic Group. Materials 2009, 2, 22-37.

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