Synthesis of a series of chiral copolymers with azo groups and investigations of reversible liquid crystalline alignment induced by the LB films of these materials

Yanqing Tian, Yanzhi Ren, Ruipen Sun, Yingying Zhao, Xinyi Tang, Ximin Huang, Shiquan Xi

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

A series of liquid crystalline copolymers, poly{2-hydroxyethyl methacrylate}-co-{6-[4-(S- 2-methyl-l-butyloxycarbonylphenylazo)phenoxy]hexyl methacrylate} with an azobenzene moiety as photoreactive mesogenic unit, was prepared and investigated by using DSC, polarized optical microscopy and X-ray diffraction. The results show that these polymers exhibit smectic phases. Z-type Langmuir-Blodgett films of these copolymers were successfully deposited onto calcium fluoride and quartz. Reversible homeotropic and planar liquid crystal alignments were induced by using the photochromism of the LB films of one of the copolymers containing 20-6 mol % of the azo unit.

Original languageEnglish (US)
Pages (from-to)177-183
Number of pages7
JournalLiquid Crystals
Volume22
Issue number2
DOIs
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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