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

Materials

Kohsuke Kawabata¹ 

[1] id="af1-materials-02-00022">Institute of Materials Science, Graduate School of Pure and Applied Sciences / University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Jap

关键词: Liquid crystal;    conductive polymer;    electron spin resonance.;   

DOI  :  10.3390/ma2010022

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.