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High Catalytic Synergism between the Components of the Rhenium Complex@Silver Hybrid Material in Alkene Epoxidations

Authors

  • Dr. Arindam Indra,

    1. Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, Sekr. C2, 10623 Berlin (Germany), Fax: (+49) 030-314-29732
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  • Dr. Mark Greiner,

    1. Fritz Haber Institute of the Max Planck Society, Department of Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin (Germany)
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  • Dr. Axel Knop Gericke,

    1. Fritz Haber Institute of the Max Planck Society, Department of Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin (Germany)
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  • Prof. Dr. Robert Schlögl,

    1. Fritz Haber Institute of the Max Planck Society, Department of Inorganic Chemistry, Faradayweg 4-6, 14195 Berlin (Germany)
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  • Prof. Dr. David Avnir,

    Corresponding author
    1. Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904 (Israel), Fax: ++972-2-6520099
    • David Avnir, Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904 (Israel), Fax: ++972-2-6520099===

      Matthias Driess, Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, Sekr. C2, 10623 Berlin (Germany), Fax: (+49) 030-314-29732===

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  • Prof. Dr. Matthias Driess

    Corresponding author
    1. Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, Sekr. C2, 10623 Berlin (Germany), Fax: (+49) 030-314-29732
    • David Avnir, Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904 (Israel), Fax: ++972-2-6520099===

      Matthias Driess, Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, Sekr. C2, 10623 Berlin (Germany), Fax: (+49) 030-314-29732===

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Abstract

The immobilization of a water-soluble rhenium complex in metallic silver matrices has resulted in a highly efficient catalyst for epoxidation, which has better epoxidation catalytic activity than the individual components. This unprecedented synergism could be obtained only by using the novel immobilization methodology, and not by using the standard adsorption process. The composite catalyst has been fully characterized (by using XRD, TEM, SEM, energy-dispersive X-ray spectroscopy, and atomic X-ray mapping), and the synergism has originated as a result of the proximity of the two components. Photoemission spectroscopic studies confirm the presence of +6 and +7 oxidation states of rhenium in metallic silver in the active catalyst.

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