An Unusual Endothermic Transition to an Optically Isotropic Phase Organized by Chiral Molecular Recognition

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Copyright (c) 1998 The Japan Society of Applied Physics
, , Citation Atsushi Yoshizawa et al 1998 Jpn. J. Appl. Phys. 37 L942 DOI 10.1143/JJAP.37.L942

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Author affiliations

1 Central R&D Laboratory, Japan Energy Corporation, 3-17-35 Niizo-minami, Toda, Saitama 335-8502, Japan

2 Sagami Chemical Research Center, 4-4-1 Nishiohnuma, Sagamihara, Kanagawa 229-0012, Japan

3 Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan

4 Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-2-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan

Dates

  1. Received 13 March 1998
  2. Accepted 18 June 1998

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1347-4065/37/8A/L942

Abstract

A novel chiral liquid crystal was found to exhibit an endothermic transition upon cooling from a chiral smectic C phase to an optically isotropic phase. C-13 NMR and X-ray diffraction indicate that the isotropic phase has a layered structure in which fast isotropic reorientation of molecules or molecular assemblies occurs. We suggest that molecular aggregation via chiral recognition breaks anisotropic molecular ordering, which leads to a novel phase structure.

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10.1143/JJAP.37.L942