A photoresponsive azobenzene-bridged cubic silsesquioxane network

Sufang Guo, Tatsuya Okubo, Kazuyuki Kuroda, Atsushi Shimojima

    Research output: Contribution to journalArticle

    5 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

    Fingerprint

    Azobenzene
    Gels
    gels
    Siloxanes
    Hydrosilylation
    Photoisomerization
    siloxanes
    Toluene
    Isomerization
    swelling
    isomerization
    Swelling
    toluene
    Thermodynamic stability
    thermal stability
    chemistry
    cycles
    azobenzene

    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

    Cite this

    A photoresponsive azobenzene-bridged cubic silsesquioxane network. / Guo, Sufang; Okubo, Tatsuya; Kuroda, Kazuyuki; Shimojima, Atsushi.

    In: Journal of Sol-Gel Science and Technology, Vol. 79, No. 2, 01.08.2016, p. 262-269.

    Research output: Contribution to journalArticle

    @article{35945dd4e317428b9ab4cf7ea985c7bc,
    title = "A photoresponsive azobenzene-bridged cubic silsesquioxane network",
    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.]",
    keywords = "Azobenzene, Inorganic–organic hybrids, Photoresponsive materials, Polyhedral oligomeric silsesquioxane",
    author = "Sufang Guo and Tatsuya Okubo and Kazuyuki Kuroda and Atsushi Shimojima",
    year = "2016",
    month = "8",
    day = "1",
    doi = "10.1007/s10971-016-4074-4",
    language = "English",
    volume = "79",
    pages = "262--269",
    journal = "Journal of Sol-Gel Science and Technology",
    issn = "0928-0707",
    publisher = "Springer Netherlands",
    number = "2",

    }

    TY - JOUR

    T1 - A photoresponsive azobenzene-bridged cubic silsesquioxane network

    AU - Guo, Sufang

    AU - Okubo, Tatsuya

    AU - Kuroda, Kazuyuki

    AU - Shimojima, Atsushi

    PY - 2016/8/1

    Y1 - 2016/8/1

    N2 - 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.]

    AB - 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.]

    KW - Azobenzene

    KW - Inorganic–organic hybrids

    KW - Photoresponsive materials

    KW - Polyhedral oligomeric silsesquioxane

    UR - http://www.scopus.com/inward/record.url?scp=84976640600&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84976640600&partnerID=8YFLogxK

    U2 - 10.1007/s10971-016-4074-4

    DO - 10.1007/s10971-016-4074-4

    M3 - Article

    AN - SCOPUS:84976640600

    VL - 79

    SP - 262

    EP - 269

    JO - Journal of Sol-Gel Science and Technology

    JF - Journal of Sol-Gel Science and Technology

    SN - 0928-0707

    IS - 2

    ER -