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Proceedings Paper

Twist grain boundary phase states in ester polymorphic liquid crystalline systems
Author(s): Viktor I. Kulishov; Nonna L. Kramarenko; Lidiya A. Kutulya; Natalya I. Shkolnikova; A. S. Tolochko
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Paper Abstract

Phase states of liquid crystalline (LC) systems consisting of non-chiral smectogenic ester and structurally similar smectogenic chiral dopant, N-[4-(4-n- nonylphenyl)benzoyloxy]benzylidene S-1-benzylethylamine, have been studied. In all investigated LC systems, the twist grain boundary smectic A (TGBA) and smectic C (TGBC) phase occur between the cholesteric and SmA phases and between the cholesteric and SmC* phases, respectively. The effect of matrix smectogenity on the TGB phase regions has been established. For the chosen LC system with varying ratio of the optically active and racemic forms of the dopant at a constant total concentration, the experimental dependencies of TGBC and TGBA phase temperature ranges on a cholesteric helical twist have been obtained. The experimental results are interpreted within Renn's model.

Paper Details

Date Published: 1 January 1998
PDF: 4 pages
Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301280
Show Author Affiliations
Viktor I. Kulishov, Institute of Physics (Ukraine)
Nonna L. Kramarenko, Institute for Single Crystals (Ukraine)
Lidiya A. Kutulya, Institute for Single Crystals (Ukraine)
Natalya I. Shkolnikova, Institute for Single Crystals (Ukraine)
A. S. Tolochko, Institute of Physics (Ukraine)

Published in SPIE Proceedings Vol. 3319:
Liquid Crystals: Chemistry and Structure
Marzena Tykarska; Roman S. Dabrowski; Jerzy Zielinski, Editor(s)

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