Electrooptical Properties of Liquid Crystal Oligomer Possessing Both Lateral and Terminal Polar Groups
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概要
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We prepared a nonsymmetric dimesogenic liquid crystal (1) in which a 2,3-difluoro-1,4-diphenylbenzene unit and a 4-(4-fluorophenyl)benzene unit were connected via a flexible spacer, and investigated the physical properties. For comparison, we also investigated those of the corresponding monomesogenic compounds, 4-(4-hexylphenyl)-1-(4-hexyloxypheny)-2,3-difluorobenzene (2) and 4-(4-fluorophenyl)-1-hexyloxybenzene (3). Compound 1 exhibited a nematic phase with a wide temperature range, whereas an equimolecular mixture of compounds 2 and 3 showed nematic and smectic A phases. Both compound 1 and the mixture showed a positive dielectric anisotropy of 0.2 at $T_{\text{IN}}-10$ °C in the nematic phase. However, they showed a marked difference in electrooptical response. We discuss the oligomeric effects of compound 1 on the physical properties.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-08-25
著者
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Chiba Shota
Department Of Biology Faculty Of Science Konan University
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Yoshizawa Atsushi
Department Of Applied Chemistry Graduate School Of Science And Engineering Tokyo Institute Of Techno
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Yoshizawa Atsushi
Department of Frontier Materials Chemistry, Faculty of Science and Technology, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
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Chiba Shota
Department of Frontier Materials Chemistry, Faculty of Science and Technology, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
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