Phase transitions of cholestanyl fluoroalkanoates

Shinichi Yano Department of Synthetic Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-11, Japan

Toshihide Adachi Department of Synthetic Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-11, Japan

Hiroharu Oyaidzu Department of Synthetic Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-11, Japan

Masaru Kato Department of Synthetic Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-11, Japan

Keiichi Moriya Department of Synthetic Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-11, Japan

Abstract

Phase transitions of cholestanyl n-ω-monohydrofluoroalkanoates (C₂₇H₄₇OCO-(CF₂)_nCF₂H, n = 1, 3, 5, 7) (CAHFA) and cholestanyl n-perfluoroalkanoates (C₂₇H₄₇OCO(CF₂)_mCF₃ m = 0, 1, 2, 6) (CAPFA) were studied by D.S.C. and dielectric measurements. No liquid-crystalline phase is observed for CAHFA, and in CAPFA, one monotropical liquid-crystalline phase is found on cooling only for m = 6.

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Phase transitions of cholestanyl fluoroalkanoates

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