Design and Application of a Hybrid Material Featuring Well-Defined, Tuneable Grafting Sites for Supported Catalysis.

Authors

  • Dr. Nicolas Popoff,

    1. C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795
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  • Dr. Jeff Espinas,

    1. C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795
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  • Dr. Jérémie Pelletier,

    1. C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795
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  • Dr. Kai C. Szeto,

    1. C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795
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  • Dr. Jean Thivolle-Cazat,

    1. C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795
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  • Dr. Laurent Delevoye,

    1. UCCS (CNRS-UMR 8181), Université Lille Nord de France, USTL, 59652 Villeneuve d'Ascq (France)
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  • Dr. Régis M. Gauvin,

    Corresponding author
    1. UCCS (CNRS-UMR 8181), Université Lille Nord de France, USTL, 59652 Villeneuve d'Ascq (France)
    • Régis M. Gauvin, UCCS (CNRS-UMR 8181), Université Lille Nord de France, USTL, 59652 Villeneuve d'Ascq (France)

      Mostafa Taoufik, C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795

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  • Dr. Mostafa Taoufik

    Corresponding author
    1. C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795
    • Régis M. Gauvin, UCCS (CNRS-UMR 8181), Université Lille Nord de France, USTL, 59652 Villeneuve d'Ascq (France)

      Mostafa Taoufik, C2P2, team COMS (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex (France), Fax: (+33) 472431795

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Abstract

A new material based on amorphous silica, and featuring a well-defined phenolic functionality was prepared in two simple steps by using commercially available, cheap reagents. Silica was first reacted with aluminum isobutyl etherate to yield an aluminum isobutyl site [(≡SiO)2Al(iBu)(Et2O)], which then selectively reacted with a hydroquinone spacer to yield [(≡SiO)2(AlO[BOND]C6X4[BOND]OH)(Et2O)] (X=H or F). This support material was then used to tether the organometallic tungstenocarbyne complex [W(≡CtBu)(CH2tBu)3] to yield the surface species [(≡SiO)2(AlO[BOND]C6X4[BOND]O-W(≡CtBu)(CH2tBu)2(Et2O)] (X=H or F). Both H- and F-containing species were fully characterized, and their activities in the self-metathesis reaction of propene to ethylene and 2-butenes were found to be two and three times higher, respectively, than the activity of the corresponding tungstenocarbyne complex directly grafted onto silica.

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