A photoresponsive azobenzene-bridged cubic silsesquioxane network

Sufang Guo, Tatsuya Okubo, Kazuyuki Kuroda, Atsushi Shimojima

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

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.]

Original languageEnglish
Pages (from-to)262-269
Number of pages8
JournalJournal of Sol-Gel Science and Technology
Volume79
Issue number2
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • Azobenzene
  • Inorganic–organic hybrids
  • Photoresponsive materials
  • Polyhedral oligomeric silsesquioxane

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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