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Supported Ionic Liquid Phase Containing Palladium Nanoparticles on Functionalized Multiwalled Carbon Nanotubes: Catalytic Materials for Sequential Heck Coupling/Hydrogenation Process

Authors

  • Dr. Laura Rodríguez-Pérez,

    1. Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université Paul Sabatier, Bât 2R1, 2ème étage, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France), CNRS, LHFA UMR 5069, 31062 Toulouse Cedex 9 (France), Fax: (+33) 561558204
    2. Laboratoire de Chimie de Coordination—composante ENSIACET, 4, Allée Emile Monso BP 44362, 31030 Toulouse Cedex 4 (France)
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  • Christian Pradel,

    1. Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université Paul Sabatier, Bât 2R1, 2ème étage, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France), CNRS, LHFA UMR 5069, 31062 Toulouse Cedex 9 (France), Fax: (+33) 561558204
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  • Prof. Philippe Serp,

    1. Laboratoire de Chimie de Coordination—composante ENSIACET, 4, Allée Emile Monso BP 44362, 31030 Toulouse Cedex 4 (France)
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  • Prof. Montserrat Gómez,

    Corresponding author
    1. Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université Paul Sabatier, Bât 2R1, 2ème étage, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France), CNRS, LHFA UMR 5069, 31062 Toulouse Cedex 9 (France), Fax: (+33) 561558204
    • Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université Paul Sabatier, Bât 2R1, 2ème étage, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France), CNRS, LHFA UMR 5069, 31062 Toulouse Cedex 9 (France), Fax: (+33) 561558204
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  • Dr. Emmanuelle Teuma

    Corresponding author
    1. Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université Paul Sabatier, Bât 2R1, 2ème étage, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France), CNRS, LHFA UMR 5069, 31062 Toulouse Cedex 9 (France), Fax: (+33) 561558204
    • Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, Université Paul Sabatier, Bât 2R1, 2ème étage, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France), CNRS, LHFA UMR 5069, 31062 Toulouse Cedex 9 (France), Fax: (+33) 561558204
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Abstract

Well-dispersed palladium nanoparticles have been prepared in ionic liquids in the presence of 4-(3-phenylpropyl)pyridine under dihydrogen. These nanoparticles are immobilized onto multiwalled carbon nanotubes modified with imidazolium moieties (fCNTs). The resulting catalytic materials are tested in hydrogenation and Heck coupling reactions. Analogous Pd nanoparticles dispersed in ionic liquids have also been immobilized on silica for comparative purposes. fCNTs are found to be the best support for both hydrogenation and Heck coupling, being recycled up to four times without significant activity loss. Palladium nanoparticles supported on fCNTs are used as a single catalytic precursor for the C[BOND]C coupling/ hydrogenation sequential process using [EMI][HP(O)2OMe] (EMI=1-ethyl-3-methyl imidazolium) ionic liquid phase without addition of supplementary base.

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