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Proceedings Paper

Liquid crystalline properties of 4-alkoxy-4'-bromoazobenzenes
Author(s): Zbigniew Galewski
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Paper Abstract

A new family of liquid crystalline compound with the general formula CnH2n+1ON2Br has been synthesized, for n equal to 1 until 12 (methyl until dodecyl groups). In this family starting from pentyl derivative smectic A mesophase has been identified. For pentyl, hexyl, and heptyl derivatives, an extra monotropic smectic E was found. For pentyl until dodecyl, except undecyl derivatives, interesting heat anomalies were found by DTA and DSC calorimetry. They are interpreted as a phase transition into unknown smectic X. The influence of the structure on the phase sequence is discussed and compared to similar families: 4-chloro-4'-alkoxyazobenzenes and 4-bromobenzylidene-4'- alkoxyanilines.

Paper Details

Date Published: 2 August 1995
PDF: 8 pages
Proc. SPIE 2372, Liquid Crystals: Materials Science and Applications, (2 August 1995); doi: 10.1117/12.215544
Show Author Affiliations
Zbigniew Galewski, Univ. of Wroclaw (Poland)

Published in SPIE Proceedings Vol. 2372:
Liquid Crystals: Materials Science and Applications
Jozef Zmija, Editor(s)

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