Grafting reaction of platinum organometallic complexes on silica-supported or unsupported heteropolyacids

Nicolas Legagneux, Erwann Jeanneau, Amélie Thomas, Mostafa Taoufik, Anne Baudouin, Aimery De Mallmann, Jean Marie Basset, Frédéric Lefebvre*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Silica-supported Keggin-type heteropolyacids react with platinum(II) complexes displaying a Pt-CH3 group, leading to the evolution of methane and the formation of an organometallic fragment grafted on the polyacid. This species has been characterized by various physicochemical methods such as microanalyses, infrared spectroscopy, solid-state 1D and 2D MAS NMR, and EXAFS. Molecular models were also prepared by reaction of the nonsupported anhydrous polyacid with the platinum(II) methyl complexes. These compounds were characterized in solution by multinuclear NMR (1H, 13C, 183W, and 195Pt) and in the solid state by X-ray diffraction on monocrystals. All data indicate that the interaction between the platinum complex and the polyoxometalate is weak and that this system is better expressed as an organometallic platinum salt of the supported heteropolyacid. This complex can be seen as one of the intermediates in the partial oxidation of methane to methanol, its synthesis being the reverse reaction of the methane activation.

Original languageEnglish (US)
Pages (from-to)1783-1793
Number of pages11
Issue number7
StatePublished - Apr 11 2011

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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