Photoresponsive behavior and photochemical phase transition of amphiphilic diblock liquid-crystalline copolymer

Haifeng Yu, Tomokazu Iyoda, Kunihiko Okano, Atsushi Shishido, Tomiki Ikeda

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The photoresponsive behavior of an amphiphilic diblock liquid-crystalline (LC) copolymer (P40A37) was studied in both toluene solution and spin-coated film. The LC copolymer in a film state showed slower response and relaxation than that in the solution. Significant H-aggregation in the film led to a blue shift by 16 nm at the maximum absorption. The photochemical phase transition was observed with a polarizing optical microscope (POM) upon exposure to 366-nm light. The photoinduced isotropic state remained stable at room temperature, indicating the potential application for 2-D and 3-D storage.

Original languageEnglish
Pages (from-to)191-199
Number of pages9
JournalMolecular Crystals and Liquid Crystals
Volume443
DOIs
Publication statusPublished - 2005 Dec 1

Keywords

  • Amphiphilic liquid-crystalline diblock copolymer
  • Azobenzene
  • Liquid-crystalline polymer
  • Photochemical phase transition
  • Photosensitive polymers

ASJC Scopus subject areas

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

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