Chiroptical properties of cholesteric liquid crystals induced by chiral photochromic 3,3′-dialkoxyazobenzenes

Christian Ruslim, Masaru Nakagawa, Shin'ya Morino, Kunihiro Ichimura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The spectroscopic features and photoisomerization behaviors of chiral photochromic 3,3'-dialkoxyazobenzenes were evaluated in an isotropic solution and a nematic solvent. The effect of photoisomerization on the helical twisting power and handedness of these chiral dopants in induced cholesteric liquid crystals were studied. Depending on the distance of the chiral center from the azo-core, elongation of the helical pitch and reversion of the handedness upon E-to-Z photoisomerization were observed. These characteristics are interesting for optical devices based on light-controlled phase switching.

Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume365
DOIs
Publication statusPublished - 2001 Jan 1
Externally publishedYes

Keywords

  • Azo compounds
  • Chirality
  • Cholesteric
  • Photoisomerization

ASJC Scopus subject areas

  • Condensed Matter Physics

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