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    Synthesis, characterization and chemical oxidation of 5-(N-pyrrolyl)pentanethiol protected gold nanoparticles

    Year: 2002

    Journal: Colloids and Surfaces
    A: Physicochemical and Engineering Aspects 204 (2002) 201-209, 20111221

    Authors: Wei Xu, Wei Liu, Deqing Zhang, Yu Xu, Tongxin Wang, Daoben Zhu

    Organizations: Organic Solids Laboratory, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China

    5-(N-pyrrolyl)pentanethiol modified monolayer protected gold clusters (PPT-MPCs) have been synthesized and characterized by FT-IR, 1H-NMR, UV-vis spectra, Transmission electron microscopy (TEM), elemental analysis, XPS, cyclic voltammetry, and TGA. PPT-MPCs have been successfully cross-linked by chemical oxidation of the pyrrole units that confined to the surface of gold nanoparticles in the solution as well as in the form of monolayer. In comparison with as-prepared PPT-MPCs, oxidized PPT-MPCs from solution shows different mass loss behavior and electrical conductivity. The oxidation PPT-MPCs monolayer performed in the LB trough results in a red shift of surface plasmon absorption (~10 nm) by comparing with that of the PPT-MPCs monolayer.