Effect of pressure on mesomorphic transitions in cholesterol esters of unsaturated C18 aliphatic acids.

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概要

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• The smectic to cholesteric, cholesteric to isotropic liquid, and solid to isotropic liquid transitions in the following cholesterol esters are determined by an optical method as a function of pressure up to 1 kbar; cholesteryl oleate, cholesteryl linoleate, and cholesteryl linolenate. The pressure dependence of the transition temperatures (<I>dT</I>⁄<I>dP</I>) is in the range of 21 to 36 K kbar<SUP>−1</SUP>, and the volume changes (Δ<I>V</I>) computed by means of Clapeyron's equation are between 0.42 and 1.3 cm<SUP>3</SUP> mol<SUP>−1</SUP> at 1 bar. The volume change for the smectic to cholesteric transition increases with the number of the double bonds in the acids, while that for the cholesteric to isotropic liquid is little affected by the double bonds.

• 公益社団法人 日本化学会の論文

著者

• Nakahara Masaru

  Department Of Chemistry Faculty Of Science Kyoto University

• Maeda Katsumi

  Department of Chemistry, Faculty of Science, Kyoto University

• Osugi Jiro

  Department of Chemistry, Faculty of Science, Kyoto University

関連論文

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