Selective reflection and textural studies of free-standing films of a chiral liquid crystal
作者:
Ch. Bahr,
D. Fliegner,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 14,
issue 2
页码: 573-580
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308027673
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We present a detailed study of selective reflection from free-standing films of chiral smectic phases. Free-standing films are drawn of the chiral compound 2-(4-hexyloxyphenyl)-5-[4-(1-chloro-3-methylbutanoyloxy)phenyl]pyrimidine (2f-6) possessing a chiral smectic C and the recently discovered chiral smectic M phase, both phases showing the phenomenon of selective reflection of visible light in a certain temperature range. With linearly polarized incident light two selective reflection maxima are observed which are caused by the presence of π-walls in the film. The wavelength of the selective reflection maxima is independent of the film thickness, whereas the intensity decreases with decreasing film thickness. The dependence of the reflection maxima on temperature and enantiomeric excess is studied.
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