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

被引：3
|
作者：
Zhang, Hai Quan [1 ]
Liu, Wen Ke [1 ]
Zhao, Li Cheng [1 ]
Cheng, Zi Hui [2 ]
Zhang, Shuai [1 ]
Li, Ying [1 ]
Yang, Huai [2 ]
机构：
[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Beijing 100083, Peoples R China
来源：
CHINESE CHEMICAL LETTERS | 2009年 / 20卷 / 09期
关键词：
Dimesogenic compounds; Liquid crystal; Cholesteric phase; Smectic ordering; OPTICAL-PROPERTIES; TERMINAL GROUP; DIMERS; SPACER;
D O I：
10.1016/j.cclet.2009.04.013
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The dimesogenic compound consisting of cholesterol and cyanobiphenyl mesogens interlinked by omega-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 (S-A), 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. (C) 2009 Hai Quan Zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
引用
收藏
页码：1077 / 1080
页数：4
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