Mesomorphic Properties of 3-Pyridyl 4-(4-Alkoxybenzyleneamino) benzoates and Isomeric Compounds

Y. Matsunaga Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa, 259-1205, Japan; 6-45-219 Ryujo-ga-oka, Hiratsuka, Kanagawa, 254-0814, Japan

R. Akagawa Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa, 259-1205, Japan

K. Satou Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa, 259-1205, Japan

T. Uchida Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa, 259-1205, Japan

K. Yamamoto Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa, 259-1205, Japan

Abstract

The nematic-isotropic transition temperature of 3-pyridyl 4-(4-propoxybenzylideneamino) benzoate is higher by 13°C than that of the phenyl analogue and the smectic A-nematic/isotropic transition is also promoted by the replacement of the terminal moiety as much as 23°C. The enhancement of both the nematic and smectic thermal stabilities decreases as the terminal alkyl chain length increases. Similar changes in the mesomorphic properties by the replacement are recorded for N-[4-(4-alkoxy-benzoyloxy) benzylidene] anilines and other isomeric compounds.

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Mesomorphic Properties of 3-Pyridyl 4-(4-Alkoxybenzyleneamino) benzoates and Isomeric Compounds

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Mesomorphic Properties of 3-Pyridyl 4-(4-Alkoxybenzyleneamino) benzoates and Isomeric Compounds

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