Reactivity of anhydrous Keggin-type heteropolyacids with alkylsilanes: Synthesis and characterization

Eva Grinenval, Jean Marie Basset, Frédéric Lefebvre*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Anhydrous tungstic heteropolyacids react with alkylsilanes in the absence of solvent, leading to the evolution of hydrogen and the formation of a new kind of species where silicon is only weakly interacting with the polyoxometalate. The resulting material was characterized by various physicochemical methods including NMR, IR, and Raman spectroscopy. The most interesting feature is the unusual chemical shift of the 29Si nuclei (ca. +50 ppm), which confirms the formation of a quasi-ionic bond between the organic and inorganic moieties. The weakness of this bond was also evidenced by chemical reactivity with nBu4NCl (leading to the formation of R3SiCl species) and oxygen. This new kind of structure can be of great interest in the field of microelectronics. Indeed the reactivity described in this article can be used and transferred easily in heterogeneous conditions to introduce defects in semiconductors.

Original languageEnglish (US)
Pages (from-to)8749-8755
Number of pages7
JournalInorganic Chemistry
Issue number19
StatePublished - Oct 4 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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