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    Click chemistry in mesoporous materials: Functionalization of porous silicon rugate filters

    Access Status
    Fulltext not available
    Authors
    Ciampi, Simone
    Bocking, T.
    Kilian, K.
    Harper, J.
    Gooding, J.
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Ciampi, S. and Bocking, T. and Kilian, K. and Harper, J. and Gooding, J. 2008. Click chemistry in mesoporous materials: Functionalization of porous silicon rugate filters. Langmuir. 24 (11): pp. 5888-5892.
    Source Title
    Langmuir
    DOI
    10.1021/la800435d
    ISSN
    0743-7463
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/30092
    Collection
    • Curtin Research Publications
    Abstract

    In this paper we report the use of the optical properties of porous silicon photonic crystals, combined with the chemical versatility of acetylene-terminated SAMs, to demonstrate the applicability of "click" chemistry to mesoporous materials. Cu(I)-catalyzed alkyne-azide cycloaddition reactions were employed to modify the internal pore surfaces through a two-step hydrosilylation/cycloaddition procedure. A positive outcome of this catalytic process, here performed in a spatially confined environment, was only observed in the presence of a ligand-stabilized Cu(I) species. Detailed characterization using Fourier transform infrared spectroscopy and optical reflectivity measurements demonstrated that the surface acetylenes had reacted in moderate to high yield to afford surfaces exposing chemical functionalities of interest. The porous silicon photonic crystals modified by the two-step strategy, and exposing oligoether moieties, displayed improved resistance toward the nonspecific adsorption of proteins as determined with fluorescently labeled bovine serum albumin. These results demonstrate that "click" immobilization offers a versatile, experimentally simple, and modular approach to produce functionalized porous silicon surfaces for applications as diverse as porous siliconbased sensing devices and implantable biomaterials. © 2008 American Chemical Society.

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