A photoresponsive azobenzene-bridged cubic silsesquioxane network

Sufang Guo, Tatsuya Okubo, Kazuyuki Kuroda, Atsushi Shimojima*

*この研究の対応する著者

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Abstract: An azobenzene (AZO)-bridged cubic silsesquioxane network exhibiting reversible photoisomerization behavior in nonpolar solvents has been prepared via hydrosilylation reaction between 4,4′-diallyloxy-azobenzene and octahydridosilsesquioxane (H8Si8O12; H-POSS). Approximately 70 % of the corner Si–H groups of H-POSS are reacted to form a three-dimensional gel network while maintaining the cubic siloxane structure. The dried gel has a high thermal stability, which is attributed to the highly cross-linked cubic silsesquioxane network where AZOs are covalently incorporated in the main chain. The gel exhibits reversible swelling behavior in nonpolar solvents during wetting–drying cycles. In toluene, a large extent of reversible trans–cis isomerization of the AZO moiety is observed. These results are promising for the design of a new class of photoresponsive materials applicable in host–guest chemistry. Graphical Abstract: [Figure not available: see fulltext.]

本文言語English
ページ(範囲)262-269
ページ数8
ジャーナルJournal of Sol-Gel Science and Technology
79
2
DOI
出版ステータスPublished - 2016 8 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 化学 (全般)
  • 生体材料
  • 凝縮系物理学
  • 材料化学

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