Citation: Hai Quan Zhang, Wen Ke Liu, Li Cheng Zhao, Zi Hui Cheng, Shuai Zhang, Ying Li, Huai Yang. Reinvestigation of liquid crystalline property of dimesogenic compound consisting of cholesterol and cyanobiphenyl[J]. Chinese Chemical Letters, ;2009, 20(9): 1077-1080. doi: 10.1016/j.cclet.2009.04.013 shu

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

a State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;
b Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 11 February 2009

Fund Project: This research was supported by the National Natural Science Foundation (No.20674005)the Major project of Ministry Education of the People's Republic of China (No.104187)and Doctoral Fund of Ministry of Education of the People's Republic of China (No.20050425850).Ref

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 (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 S_Aordering.
- Dimesogenic compounds,
- Liquid crystal,
- Cholesteric phase,
- Smectic ordering
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