Synthesis of mesostructured silica from monoalkyl-substituted double five-ring units

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    A mesostructured silica-based material was synthesized by self-assembly of a novel amphiphilic molecule consisting of a well-defined siloxane head with a double five-ring (D5R) structure and a hydrophobic alkyl tail. A precursor functionalized with ethoxy groups, C22H45Si 10O15(OEt)9 (1), was hydrolyzed under an acidic condition with the retention of the D5R units, leading to the formation of two-dimensional (2D) hexagonal phase by evaporation-induced self-assembly of amphiphilic hydrolyzed molecules. Solid-state 29Si MAS NMR analysis of the resulting hybrid solid confirmed that the D5R units were cross-linked to form siloxane networks. Calcination of this hybrid solid gave mesoporous silica with high BET surface area (740 m2 g-1). These results expand the design possibility of silica-based materials at both molecular- and meso-scales, leading to the bottom up synthesis of hierarchically ordered materials.

    Original languageEnglish
    Pages (from-to)263-268
    Number of pages6
    JournalJournal of Sol-Gel Science and Technology
    Volume57
    Issue number3
    DOIs
    Publication statusPublished - 2011 Mar

    Fingerprint

    Silicon Dioxide
    Siloxanes
    siloxanes
    Silica
    silicon dioxide
    Self assembly
    self assembly
    rings
    synthesis
    Molecules
    ring structures
    Calcination
    roasting
    molecules
    Evaporation
    Nuclear magnetic resonance
    evaporation
    solid state
    nuclear magnetic resonance

    Keywords

    • Mesoporous silica
    • Organic-inorganic hybrid
    • Self-assembly
    • Siloxane cage

    ASJC Scopus subject areas

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

    Cite this

    Synthesis of mesostructured silica from monoalkyl-substituted double five-ring units. / Shimojima, Atsushi; Kuge, Hideki; Kuroda, Kazuyuki.

    In: Journal of Sol-Gel Science and Technology, Vol. 57, No. 3, 03.2011, p. 263-268.

    Research output: Contribution to journalArticle

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    abstract = "A mesostructured silica-based material was synthesized by self-assembly of a novel amphiphilic molecule consisting of a well-defined siloxane head with a double five-ring (D5R) structure and a hydrophobic alkyl tail. A precursor functionalized with ethoxy groups, C22H45Si 10O15(OEt)9 (1), was hydrolyzed under an acidic condition with the retention of the D5R units, leading to the formation of two-dimensional (2D) hexagonal phase by evaporation-induced self-assembly of amphiphilic hydrolyzed molecules. Solid-state 29Si MAS NMR analysis of the resulting hybrid solid confirmed that the D5R units were cross-linked to form siloxane networks. Calcination of this hybrid solid gave mesoporous silica with high BET surface area (740 m2 g-1). These results expand the design possibility of silica-based materials at both molecular- and meso-scales, leading to the bottom up synthesis of hierarchically ordered materials.",
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