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Influence of chiral additives onto molecular parameters of binary mixtures of cholesteric liquid crystals
Author(s): D. Z. Obadovic; M. Garic; S. Jovanovic-Santa; A. Vajda; M. Petrovic; L. Bata
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Paper Abstract

We present a study of the influence of new chiral additives 2 and 3 on phase transition and molecular parameters of binary mixtures of cholesteryl enantate and cholesteryl laurate. The addition of these compounds to the binary mixture of the cholesteryl enantate and cholesteryl laurate results in shift of the cholesteric smectic phase transition towards the direction of lower temperatures, about 10 - 12 degree(s)C. Using X-ray diffraction on the crystalline powder of unoriented samples we have determined the molecular parameters: the thickness of smectic and cholesteric layers (d) and the value of molecular parameter average distance between the long axes of neighboring molecules (D). The calculation of the value of molecular parameters d and D, indicates decrease of the thickness and packing density of the molecules of smectic layers, in Mix 1 and Mix 2, compared to 50 - 50% mixture.

Paper Details

Date Published: 27 June 2002
PDF: 4 pages
Proc. SPIE 4759, XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications, (27 June 2002); doi: 10.1117/12.472140
Show Author Affiliations
D. Z. Obadovic, Institute of Physics (FR Yugoslavia)
M. Garic, Institute of Physics (FR Yugoslavia)
S. Jovanovic-Santa, Institute of Chemistry (FR Yugoslavia)
A. Vajda, Research Institute for Solid State Physics and Optics (Hungary)
M. Petrovic, Institute of Chemistry (FR Yugoslavia)
L. Bata, Research Institute for Solid State Physics and Optics (Hungary)


Published in SPIE Proceedings Vol. 4759:
XIV Conference on Liquid Crystals: Chemistry, Physics, and Applications
Jolanta Rutkowska; Stanislaw J. Klosowicz; Jerzy Zielinski, Editor(s)

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