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Methylated β-Cyclodextrin-Capped Ruthenium Nanoparticles: Synthesis Strategies, Characterization, and Application in Hydrogenation Reactions

Authors

  • Dr. Nguyet Trang Thanh Chau,

    1. Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
    2. Université Européenne de Bretagne
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  • Dr. Soraya Handjani,

    1. Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
    2. Université Européenne de Bretagne
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  • Jean-Paul Guegan,

    1. Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
    2. Université Européenne de Bretagne
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  • Dr. Miguel Guerrero,

    1. CNRS; LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, F-31077 Toulouse (France)
    2. Université de Toulouse; UPS, INPT, LCC, F-31077 Toulouse (France)
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  • Prof. Eric Monflier,

    1. Université d'Artois, CNRS UMR 8181, Faculté des Sciences Jean Perrin, Rue Jean Souvraz, SP 18, F-62307 Lens (France)
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  • Dr. Karine Philippot,

    1. CNRS; LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, F-31077 Toulouse (France)
    2. Université de Toulouse; UPS, INPT, LCC, F-31077 Toulouse (France)
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  • Dr. Audrey Denicourt-Nowicki,

    Corresponding author
    1. Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
    2. Université Européenne de Bretagne
    • Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
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  • Prof. Alain Roucoux

    Corresponding author
    1. Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
    2. Université Européenne de Bretagne
    • Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35 708 Rennes Cedex 7 (France), Fax: (+33) 02-23-23-81-99
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Abstract

Colloidal suspensions of ruthenium nanoparticles (Ru0 NPs) stabilized by randomly methylated β-cyclodextrins were easily prepared in aqueous solution by two comparative reductive approaches. The first method relies on a one-step hydrogen reduction of ruthenium trichloride as a metal precursor in the presence of cyclodextrins (one-pot method). The second method consists of the chemical reduction of metal salts by NaBH4, followed by the stabilization of ruthenium NPs by post-addition of the methylated β-cyclodextrins (cascade method). The modified β-cyclodextrin-capped ruthenium NPs obtained were characterized using TEM, DLS, and NMR techniques. The highly dispersed colloidal suspensions contain very small particles in the size range of 1–1.4 nm. Their catalytic performances were investigated in terms of activity and selectivity of their biphasic hydrogenation of various substrates (olefins, ketones, and disubstituted arenes) under mild conditions.

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