Chiral rhodium complexes covalently anchored on carbon nanotubes for enantioselective hydrogenation

Chiral rhodium hybrid nanocatalysts have been prepared by covalent anchorage of pyrrolidine-based diphosphine ligands onto functionalized CNTs. This work constitutes the first attempt at covalent anchoring of homogeneous chiral catalysts on CNTs. The catalysts, prepared with two different chiral pho...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2014-05, Vol.43 (20), p.7455-7463
Main Authors: Gheorghiu, C C, Machado, B F, Salinas-Martínez de Lecea, C, Gouygou, M, Román-Martínez, M C, Serp, P
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Chemical Sciences
Coordination chemistry
Covalence
Hydrogenation
Nanostructure
Phosphines
Rhodium
X-ray photoelectron spectroscopy
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Summary:Chiral rhodium hybrid nanocatalysts have been prepared by covalent anchorage of pyrrolidine-based diphosphine ligands onto functionalized CNTs. This work constitutes the first attempt at covalent anchoring of homogeneous chiral catalysts on CNTs. The catalysts, prepared with two different chiral phosphines, were characterized by ICP, XPS, N2 adsorption and TEM, and have been tested in the asymmetric hydrogenation of two different substrates: methyl 2-acetamidoacrylate and α-acetamidocinnamic acid. The hybrid nanocatalysts have shown to be active and enantioselective in the hydrogenation of α-acetamidocinnamic acid. A good recyclability of the catalysts with low leaching and without loss of activity and enantioselectivity was observed.
ISSN:1477-9226
1477-9234
DOI:10.1039/c3dt53301h