文献类型：期刊文献

中文题名：Effect of fluorine groups and different terminal chains on the electro-isomerization of azobenzene liquid crystals

英文题名：Effect of fluorine groups and different terminal chains on the electro-isomerization of azobenzene liquid crystals

作者：Xiong, Jing-Jing[1];Shen, Dong[1];Zheng, Zhi-Gang[1];Wang, Xiao-Qian[1]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2016

卷号：25

期号：9

中文期刊名：Chinese Physics B

外文期刊名：CHINESE PHYSICS B

收录：CSTPCD;;EI(收录号：20163902841126);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000384226500066)】；CSCD:【CSCD2015_2016】；

基金：Project supported by the National Natural Science Foundation of China (Grant Nos. 61435008 and 61575063).

语种：英文

中文关键词：electro-isomerization azobenzene liquid crystals fluorine

外文关键词：electro-isomerization; azobenzene liquid crystals; fluorine

摘要：A series of azobenzene liquid crystals with one or two terminal acrylate groups were synthesized and their polymers were fabricated.The azobenzene liquid crystals and their polymers achieved the photoisomerization from the liquid crystalline trans-isomer to the isotropic cis-isomer with UV irradiation.Then,the cis to trans isomerization induced by an electric field was studied,the time required for electro-isomerization was measured,the texture change and absorption variation from cis to trans form induced by the electric field were observed clearly,and the time required for electro-isomerization was much shorter than that for thermal relaxation.The influence of the polar group（fluorine）,terminal acrylate group,and flexible alkyl chain on the time of electro-isomerization was studied.The results show that the compounds with polar fluorine group require shorter time for electro-isomerization and the polymerization of terminal acrylate group delays the electro-isomerization.
A series of azobenzene liquid crystals with one or two terminal acrylate groups were synthesized and their polymers were fabricated. The azobenzene liquid crystals and their polymers achieved the photoisomerization from the liquid crystalline trans-isomer to the isotropic cis-isomer with UV irradiation. Then, the cis to trans isomerization induced by an electric field was studied, the time required for electro-isomerization was measured, the texture change and absorption variation from cis to trans form induced by the electric field were observed clearly, and the time required for electro-isomerization was much shorter than that for thermal relaxation. The influence of the polar group (fluorine), terminal acrylate group, and flexible alkyl chain on the time of electro-isomerization was studied. The results show that the compounds with polar fluorine group require shorter time for electro-isomerization and the polymerization of terminal acrylate group delays the electro-isomerization.