Effect of configuration of the branching terminal group on the stability of antiferroelectric liquid crystals

Yukio Ouchi Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN

Yasue Yoshioka Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN

Hisao Ishii Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN

Kazuhiko Seki Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN

Masato Kitamura Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN

Ryoji Noyori Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN

Yoichi Takanishl Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN; Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152, JAPAN

Isa Nishiyama Department of Chemistry, Nagoya University, Chikusa-ku, Nagoya, 464, JAPAN; Petroleum Laboratory, Japan Energy Corporation, Toda-shi, Saitama, 335, JAPAN

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Abstract

Two different series of smectic liquid-crystalline biphenyl carboxylates have been prepared and their smectic properties investigated. The ‘lateral’ alkyl chain at the branching carbon was varied from methyl to hexyl for the homologous series of 4-(1-alkylheptyloxycarbonyl)phenyl 4′-octyloxybiphenyl-4-carboxylates. The antiferroelectric phase (S_CA(*)) was observed for the homologous series except the pentyl homologue. The smectic layer thicknesses for the series were found to increase as ascending the ‘lateral’ alkyl chain, indicating that the ‘lateral’ alkyl group of the series is in fact along the molecular long axis to some extent, which can occur if the molecule has the ‘bent-shaped’ structure.

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Effect of configuration of the branching terminal group on the stability of antiferroelectric liquid crystals

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Effect of configuration of the branching terminal group on the stability of antiferroelectric liquid crystals

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