文献类型：期刊文献

英文题名：The synthesis and mesomorphic properties of 4-n-alkoxyphenyl 4-[(4-n-alkoxy-2,3,5,6-tetrafluorophenyl)ethyl]benzoates

作者：Dai, Xiuwen[1];Cai, Liangzhen[1];Wen, Jianxun[2]

机构：[1]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Shanghai Tianwen Chem Corp, Shanghai, Peoples R China

年份：2013

卷号：40

期号：8

起止页码：1146

外文期刊名：LIQUID CRYSTALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000321690000016)】；

语种：英文

外文关键词：liquid crystal; fluoro-substituted tolane; monotropic nematic phase; ethylene linking group; bridge

摘要：4-n-Alkoxyphenyl4-[(4-n-alkoxy-2,3,5,6-tetrafluorophenyl)ethynyl]benzoates (compound A) are synthesised by a convenient method. These compounds exhibit only enantiotropic nematic phases and have very high clearing points. These compounds (As) can be transformed into corresponding ethane derivatives, via hydrogenation using a palladium catalyst (Pd/C), which exhibit monotropic nematic phases. The effect of the ethylene bridge (-CH2CH2-) on the mesomorphic behaviour is discussed.