Synthesis and photoresponsive behavior of a liquid-crystalline polymer with a 4-ring azotolane moiety with huge birefringence

Kunihiko Okano, Atsushi Shishido, Tomiki Ikeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel liquid-crystalline polymer (LCP) containing an azobenzene group directly connected to a tolane moiety (azotolane moiety) was synthesized. The LCP showed a nematic phase in a broad temperature range (200C). Trans-cis photoisomerization and cis-trans thermal isomerization occurred even though the LCP contains a long azotolane moiety. The homogeneously aligned film of the LCP exhibited an extremely large value of n (0.70 at 633nm). Upon irradiation with a pumping beam in the LC phase, a large change in n was induced due to destruction of the homogeneous alignment of the azotolane moieties.

Original languageEnglish
Pages (from-to)259/[1015]-269/[1025]
JournalMolecular Crystals and Liquid Crystals
Volume478
Issue number1
DOIs
Publication statusPublished - 2007 Jan

Keywords

  • Azotolane liquid-crystalline polymer
  • Change in birefringence
  • High birefringence
  • Photoisomerization

ASJC Scopus subject areas

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

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