Layered assembly of alkoxy-substituted bis(trichlorosilanes) containing various organic bridges via hydrolysis of Si-Cl groups

Yasuhiro Fujimoto, Masaru Heishi, Atsushi Shimojima, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Monoalkoxy derivatives of bis(trichlorosilanes) containing methylene, ethylene, and phenylene bridges (Cl3Si-R′-SiCl 2OC16H33, R′ = -CH2-, -C 2H4-, -C6H4-) were synthesized and self-assembly of the amphiphilic hydrolyzed species ((HO)3Si- R′-Si(OH)2OC16H33) was investigated. Hydrolysis of all Si-Cl groups was confirmed by liquid-state 29Si and 13C NMR while the alkoxy groups were retained. The self-assembly was induced either by casting the hydrolyzed solutions on glass substrates or by cooling. The structures of the products were characterized by X-ray diffraction (XRD), electron microscopies (TEM and SEM), and solid-state 29Si and 13C NMR. The products obtained from methylene- and ethylene-bridged monomers have lamellar structures consisting of bridged polysilsesquioxane layers and all-trans hexadecanol layers, which means that alkoxy groups were cleaved during polycondensation. The large difference in the d values of these hybrids (5.84 nm and 3.40 nm) suggests the variation in the arrangement of hexadecanol molecules within the layers. In contrast, the phenylene-bridged monomer afforded a lamellar solid (d = 5.14 nm) consisting of monomeric species, where both silanol groups and alkoxy groups mostly remain intact. This is attributed to the relatively stronger interaction and hydrogen-bonding networks between hydrolyzed species.

    Original languageEnglish
    Pages (from-to)5151-5157
    Number of pages7
    JournalJournal of Materials Chemistry
    Volume15
    Issue number48
    DOIs
    Publication statusPublished - 2005 Dec 28

    Fingerprint

    Self assembly
    hydrolysis
    Hydrolysis
    Ethylene
    assembly
    Monomers
    Nuclear magnetic resonance
    Lamellar structures
    Polycondensation
    Electron microscopy
    Hydrogen bonds
    Casting
    methylene
    self assembly
    Transmission electron microscopy
    Cooling
    Derivatives
    X ray diffraction
    ethylene
    Glass

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Materials Chemistry
    • Materials Science(all)

    Cite this

    Layered assembly of alkoxy-substituted bis(trichlorosilanes) containing various organic bridges via hydrolysis of Si-Cl groups. / Fujimoto, Yasuhiro; Heishi, Masaru; Shimojima, Atsushi; Kuroda, Kazuyuki.

    In: Journal of Materials Chemistry, Vol. 15, No. 48, 28.12.2005, p. 5151-5157.

    Research output: Contribution to journalArticle

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