Identification of the Liquid Crystal Phases of some Chiral Schiff Bases

Jean Billard Department of Physics and Department of Organic Chemistry, Chalmers University of Technology, S-412 96, Göteborg, Sweden; Laboratoire de Physique de la Matière Condensée (Equipe de Recherche assoiée au C.N.R.S. no. 542), Collège de France, 75231, Paris, Cédex 05, France

Anders Dahlgren Department of Physics and Department of Organic Chemistry, Chalmers University of Technology, S-412 96, Göteborg, Sweden

Kurt Flatischler Department of Physics and Department of Organic Chemistry, Chalmers University of Technology, S-412 96, Göteborg, Sweden

Sven T. Lagerwall Department of Physics and Department of Organic Chemistry, Chalmers University of Technology, S-412 96, Göteborg, Sweden

Bengt Otterholm Laboratoire de Physique de la Matière Condensée (Equipe de Recherche assoiée au C.N.R.S. no. 542), Collège de France, 75231, Paris, Cédex 05, France; Department of Physics and Department of Organic Chemistry, Chalmers University of Technology, S-412 96, Göteborg, Sweden

Abstract

The mesophases of eleven chiral Schiff bases are identified by miscibility examinations, using the contact method. Some of these compounds exhibit medium pitch (2-3 μm) chiral smectic C mesophases with left-handed twist which are thermodynamically stable near room temperature. Some binary mixtures having thermodynamically stable ferroelectric (C∗) state at room temperature are described.

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Identification of the Liquid Crystal Phases of some Chiral Schiff Bases

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Identification of the Liquid Crystal Phases of some Chiral Schiff Bases

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