Investigation of Acid Centers in MIL-53(Al, Ga) for Brønsted-Type Catalysis: In Situ FTIR and Ab Initio Molecular Modeling

Authors

  • Dr. Ugo Ravon,

    1. Université Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de Recherches sur La Catalyse et l'Environnement de Lyon, 2 avenue Albert Einstein, F-69626 Villeurbanne (France), Fax: (+33) 472-44-53-99
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  • Dr. Gérald Chaplais,

    1. Equipe Matériaux à Porosité Contrôlée (MPC), Institut de Science des Matériaux de Mulhouse (IS2M), LRC CNRS 7228, Université Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093, Mulhouse Cedex (France)
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  • Dr. Céline Chizallet,

    1. IFP-Lyon, Direction Catalyse et Séparation, BP 3, 69360 Solaize (France)
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  • Behnam Seyyedi ,

    1. Department of Inorganic, Physical and Materials Chemistry, University of Torino, via Giuria 7, I-10125 Torino (Italy)
    2. NIS Centre of Excellence and INSTM Centro di Riferimento via Quarello 11, I-10135, Torino (Italy)
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  • Dr. Francesca Bonino ,

    1. Department of Inorganic, Physical and Materials Chemistry, University of Torino, via Giuria 7, I-10125 Torino (Italy)
    2. NIS Centre of Excellence and INSTM Centro di Riferimento via Quarello 11, I-10135, Torino (Italy)
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  • Prof. Dr. Silvia Bordiga ,

    1. Department of Inorganic, Physical and Materials Chemistry, University of Torino, via Giuria 7, I-10125 Torino (Italy)
    2. NIS Centre of Excellence and INSTM Centro di Riferimento via Quarello 11, I-10135, Torino (Italy)
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  • Dr. Nicolas Bats,

    1. IFP-Lyon, Direction Catalyse et Séparation, BP 3, 69360 Solaize (France)
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  • Dr. David Farrusseng

    1. Université Lyon 1, CNRS, UMR 5256, IRCELYON, Institut de Recherches sur La Catalyse et l'Environnement de Lyon, 2 avenue Albert Einstein, F-69626 Villeurbanne (France), Fax: (+33) 472-44-53-99
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Abstract

original image

Run of the MIL: In contrast to MIL-53(Al), IM-19 (MIL-53 (Ga)) is extremely active and selective for the alkylation of aromatics. The reaction proceeds through the protonation of the aromatic substrate. CO adsorption and molecular modeling show that the bridging μ2-OH of IM-19 exhibits stronger Brønsted-type acidity than does MIL-53(Al).

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