A photoresponsive azobenzene-bridged cubic silsesquioxane network

Sufang Guo, Tatsuya Okubo, Kazuyuki Kuroda, Atsushi Shimojima

    Research output: Contribution to journalArticle

    7 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

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

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