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Proceedings Paper

Liquid crystalline properties of 4-hexyl-4'-alkoxyazobenzenes and 4-heptyl-4'-alkoxyazobenzenes
Author(s): J. Zienkiewicz; Zbigniew Galewski
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Paper Abstract

Two families of liquid crystalline compounds: 4-hexyl-4-alkoxyazobenzenes and 4-heptyl-4'-alkoxyawbenzenes have been synthesised for alkyl chain from methoxy up to octadecyloxy. On the base of the DSC calorimetry and polarizing microscopy rich polymorphism was detected. Maximum four mesophases were found: nematic, smectic A, smectic C and smectic I. The interesting even-odd effects for temperature of clearing was observed similar to the other families of 4-alkyl4'-allcyloxyazobenzenes. The phase diagram sequence and temperatures of phase transition are discussed and there are compared their entropy effects to those of the other azobenzene liquid crystalline compounds.

Paper Details

Date Published: 1 January 1998
PDF: 10 pages
Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301249
Show Author Affiliations
J. Zienkiewicz, Univ. of Wroclaw (Poland)
Zbigniew Galewski, Univ. of Wroclaw (Poland)

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

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