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Proton sites in Keggin heteropoly acids from17O NMR

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Abstract

The structure of the bulk proton sites in dehydrated solid Keggin-type heteropoly acids (HPA) H3PW12O40 and H4SiW12O40 was determined by17O NMR. The terminal W=O oxygen atoms in Keggin heteropolyanions were found to be the predominant protonation sites. The protonation of HP As in solution is also discussed on the basis of17O NMR data.

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Author notes

  1. I. V. Kozhevnikov

    Present address: Laboratory of Organic Chemistry and Catalysis, Delft University of Technology, Julianalaan 136, 2628, BL Delft, The Netherlands

Authors and Affiliations

  1. Boreskov Institute of Catalysis, 630090, Novosibirsk, Russia

    I. V. Kozhevnikov

  2. Laboratory of Organic Chemistry and Catalysis, Delft University of Technology, Julianalaan 136, 2628, BL Delft, The Netherlands

    A. Sinnema & H. van Bekkum

Authors
  1. I. V. Kozhevnikov
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  2. A. Sinnema
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  3. H. van Bekkum
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Kozhevnikov, I.V., Sinnema, A. & van Bekkum, H. Proton sites in Keggin heteropoly acids from17O NMR. Catal Lett 34, 213–221 (1995). https://doi.org/10.1007/BF00808336

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  • DOI: https://doi.org/10.1007/BF00808336

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