Synthesis and Mesomorphic Properties of Chiral Mesogens Bearing Fluorinated Alkyl Terminal Tails  

作　　者：秦川 荣国斌 陈宝铨 闻建勋 

机构地区：[1]Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China [2]Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences.Shanghai 200032, China

出　　处：《Chinese Journal of Chemistry》2006年第1期99-102,共4页中国化学（英文版）

摘　　要：Ten chirai 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 fluori- natal 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.Ten chirai 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 fluori- natal 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.

关 键 词：chiral mesogenic compound fluorinated alkyl chain mesogenic phasee 

分 类 号：O632[理学—高分子化学]