文献类型：期刊文献

英文题名：Synthesis and mesomorphic properties of chiral mesogens bearing fluorinated alkyl terminal tails

作者：Qin, C; Rong, GB; Chen, BQ; Wen, JX

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Organ Chem, Shanghai 200032, Peoples R China

年份：2006

卷号：24

期号：1

起止页码：99

外文期刊名：CHINESE JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000234460400017)】；

语种：英文

外文关键词：chiral mesogenic compound; fluorinated alkyl chain; mesogenic phasee

摘要：Ten chiral mesogenic compounds containing fluorinated alkyl terminal tails were prepared and characterized by IR, NMR, MS. The phase transition behavior was investigated by DSC and polarized optical microscope. Two-ring liquid crystal compounds exhibited no mesogenic phase or only a monotropic smectic A phase. The longer fluorinatd alkyl chain on the three-ring was advantageous to the formation of smectic phase. The mesogens with chiral center located between fluorinated tail and mesogenic core exhibited chiral smectic C phase and other smectic phases when the alkoxyl adhering to the other side of the mesogenic core was of intermediate length.