The thermal properties of liquid crystalline materials incorporating cyanothiophene and cyanofuran.

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概要

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• Some homologous series of cyanothiophene and cyanofuran compounds have been prepared. 4-Alkoxyphenyl 3-(5-bromo-2-thienyl)acrylate (<B>1</B>) and 4-alkoxyphenyl 3-(5-cyano-2-thienyl)acrylate (<B>2</B>), and 4-alkoxy-phenyl 4-(5-bromo-2-furylcarbonyloxy)benzoate (<B>3</B>) and 4-alkoxyphenyl 4-(5-cyano-2-furylcarbonyloxy)benzoate (<B>4</B>) give rise to a nematic phase. For compound <B>4</B>, a smectic A phase which commences from the hexyloxy homolog has a bilayer (<I>S</I><SUB>A2</SUB>) arrangement of the molecules. The thermal stabilities of the mesophases are lower than those of the corresponding benzonitrile compounds. This arises from an increased molecular breadth around the terminal portion and the change of the dipole moment arising from the terminal cyano group bending with respect to the long molecular axis.

• 公益社団法人 日本化学会の論文

著者

• Takenaka Shunsuke

  Department of Advanced Materials and Science, Faculty of Engineering, Yamaguchi University

• TAKENAKA Shunsuke

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• Kusabayashi Shigekazu

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• Miyake Shiro

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

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