Reinvestigation of liquid crystalline property of dimesogenic compound consisting of cholesterol and cyanobiphenyl  

作　　者：Hai Quan Zhang Wen Ke Liu Li Cheng Zhao Zi Hui Cheng Shuai Zhang Ying Li Huai Yang 

机构地区：[1]State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China [2]Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Chinese Chemical Letters》2009年第9期1077-1080,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation(No.20674005);the Major project of Ministry Education of the People's Republic of China(No.104187);Doctoral Fund of Ministry of Education ofthe People's Republic of China(No.20050425850)

摘　　要：The dimesogenic compound consisting of cholesterol and cyanobiphenyl mesogens interlinked by ω-oxyalkanoyl spacer was synthesized. The mesomorphic properties were investigated by differential scanning calorimetry （DSC）, polarizing optical microscopy （POM）, and X-ray diffraction （XRD）. The experimental results indicated that this compound exhibited mesophase over a much wider temperature range and a new mesophase blue phase （BP）. Focal conic domains （FCDs） and droplets texture to the smectic A phase （SA）, oily streaks typical to the chiral nematic （N＊） phase were found in the liquid crystalline state, respectively. Besides, it exhibited a smectic layer spacing about 1.0 time to the length of the molecule, which indicated a monolayer type of SA ordering. 2009 Hal Quan Zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.The dimesogenic compound consisting of cholesterol and cyanobiphenyl mesogens interlinked by ω-oxyalkanoyl spacer was synthesized. The mesomorphic properties were investigated by differential scanning calorimetry （DSC）, polarizing optical microscopy （POM）, and X-ray diffraction （XRD）. The experimental results indicated that this compound exhibited mesophase over a much wider temperature range and a new mesophase blue phase （BP）. Focal conic domains （FCDs） and droplets texture to the smectic A phase （SA）, oily streaks typical to the chiral nematic （N＊） phase were found in the liquid crystalline state, respectively. Besides, it exhibited a smectic layer spacing about 1.0 time to the length of the molecule, which indicated a monolayer type of SA ordering. 2009 Hal Quan Zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关 键 词：Dirnesogenic compounds Liquid crystal Cholesteric phase Smectic ordering 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] S831.5[农业科学—畜牧学]