Designed synthesis of nanostructured siloxane-organic hybrids from amphiphilic silicon-based precursors

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    Abstract

    This paper reports on recent progress in the synthesis of nanostructured siloxane-organic hybrids based on the self-assembly of amphiphilic silicon-based precursors. A variety of ordered hybrid materials have been obtained by molecular design of the precursors. Alkoxysilanes and chlorosilanes with covalently attached hydrophobic organic tails are hydrolyzed to form amphiphilic molecules containing silanol groups, leading to the formation of layered (lamellar) structures. Transparent and oriented thin films of lamellar hybrids were prepared by the reaction in the presence of tetraalkoxysilane. In addition, the design of molecules having alkyl chains and large oligosiloxane heads led to the formation of mesophases consisting of cylindrical assemblies, providing a direct pathway to ordered porous silica. The synthesis, structural features, and formation processes of these hybrid mesostructures are discussed.

    Original languageEnglish
    Pages (from-to)53-63
    Number of pages11
    JournalChemical Record
    Volume6
    Issue number2
    DOIs
    Publication statusPublished - 2006

    Fingerprint

    Siloxanes
    Silicon
    Molecules
    Lamellar structures
    Hybrid materials
    Silicon Dioxide
    Self assembly
    Silica
    Thin films
    Head
    silanol

    Keywords

    • Nanostructures
    • Organic-inorganic hybrid composites
    • Organoalkoxysilane
    • Porous silica
    • Self-assembly

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

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    abstract = "This paper reports on recent progress in the synthesis of nanostructured siloxane-organic hybrids based on the self-assembly of amphiphilic silicon-based precursors. A variety of ordered hybrid materials have been obtained by molecular design of the precursors. Alkoxysilanes and chlorosilanes with covalently attached hydrophobic organic tails are hydrolyzed to form amphiphilic molecules containing silanol groups, leading to the formation of layered (lamellar) structures. Transparent and oriented thin films of lamellar hybrids were prepared by the reaction in the presence of tetraalkoxysilane. In addition, the design of molecules having alkyl chains and large oligosiloxane heads led to the formation of mesophases consisting of cylindrical assemblies, providing a direct pathway to ordered porous silica. The synthesis, structural features, and formation processes of these hybrid mesostructures are discussed.",
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