Reinvestigation of liquid crystalline property of dimesogenic compound consisting of cholesterol and cyanobiphenyl |
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| Authors: | Hai Quan Zhang Wen Ke Liua Li Cheng Zhaoa Zi Hui Chengb Shuai Zhanga Ying Lia Huai Yangb a State Key Laboratory of Metastable Materials Science Technology Yanshan University Qinhuangdao China b |
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| Institution: | 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 |
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| Abstract: | 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 SAordering. |
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| Keywords: | Dimesogenic compounds Liquid crystal Cholesteric phase Smectic ordering |
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