Photoinduced deformation and isomerization of azobenzene liquid-crystalline polymer films at cryogenic temperature. (22nd November 2018)

• Record Type: Journal Article
• Authors: Ogikubo, Shunya; Hashimoto, Gaku; Ube, Toru; Suda, Masayuki; Yamamoto, Hiroshi; Ikeda, Tomiki
• Is Part Of: Molecular crystals and liquid crystals. Volume 676(2019)
• Page Start: 30
• Page End: 35
• Publication Date: 2018-11-22
• Subjects: Azobenzene -- Crosslinked liquid-crystalline polymer -- Cryogenic temperature -- Photoinduced bending; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2019.1595490
• Languages: English
• ISSNs: 1542-1406

Abstract

Abstract: We prepared 2 types of crosslinked liquid-crystalline polymers (CLCPs) (polyacrylates) with the same side-chain length but a different position of an azobenzene moiety in the side chain. We evaluated photoinduced deformation behavior of the CLCP films and photoisomerization behavior of azobenzene in the films at cryogenic temperature. Azobenzene moieties in both CLCP films showed no trans-cis isomerization and neither film exhibited bending behavior upon irradiation with UV light in liquid nitrogen [77 K]. On the other hand, when the film included azobenzene with a long spacer and a short tail, cis-trans isomerization of azobenzene and photoinduced deformation were observed in liquid nitrogen.