Synthesis and properties of highly birefringent azo-tolane liquid-crystalline polymers: Effect of the position of the tolane moiety in the side chain

Kunihiko Okano, Atsushi Shishido, Tomiki Ikeda, Takeshi Shiono

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have synthesized two types of azobenzene liquid-crystalline polymers with a tolane moiety exhibiting high birefringence: one is the copolymer having an azobenzene moiety and a 3-ring tolane group in the side chain (PA-3T) and the other is the polymer containing a long mesogen core, in which the azobenzene group is directly connected to the tolane moiety (P3AT). The values of 0.35 and 0.39 in birefringence were obtained in PA-3T and P3AT, respectively. When the film was irradiated with a writing beam at 488 nm, the change in birefringence was efficiently induced with P3AT compared with PA-3T.

Original languageEnglish
Pages (from-to)275-285
Number of pages11
JournalMolecular Crystals and Liquid Crystals
Volume441
DOIs
Publication statusPublished - 2005

Keywords

  • Azobenzene
  • Change in birefringence
  • Liquid-crystalline polymer
  • Tolane

ASJC Scopus subject areas

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

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