1D16 分子末端にチオシアノ基を持つ化合物の液晶性

概要

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This paper describes the preparation and thermal properties of some liquid crystalline materials having a thiocyano group at the terminal position. 4-Thiocyanophenyl 4-alkoxybenzoate derivatives are non-mesogenic. 4-Thiocyanophenyl 4-(4-alkoxybenzoyloxy)benzoate derivatives show nematic and smectic A phases. The nematic-isotropic(smectic A-isotropic) transition temperatures are fairly low compared with those for the corresponding cyano compounds, and the smectic A phase commences from the carly members. The layer spacing of the smectic A phase was examined by X-Ray diffraction, suggesting that the homologous members have two kinds of smectic A phase having different thermal properties, while the smectic-smectic transition was detectable neither by DSC nor microscopic observations. 4-Thiocyanophenyl 4-(4-alkoxyphenoxycarbonyl)benzoate derivatives show nematic smectic A, and B phases.
日本液晶学会の論文
1995-09-10