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Electrostatic immobilization of bis(oxazoline)-copper complexes on mesoporous crystalline materials: Cation exchange vs. incipient wetness methods

AutorFeldman, Robert A. ; Fraile, José M.
Palabras claveAsymmetric catalysis
Immobilized catalysts
Bis(oxazolines)
Copper
Mesoporous materials
Fecha de publicación2014
EditorElsevier
CitaciónApplied Catalysis A: General 485: 67-73 (2014)
ResumenChiral copper complexes with bis(oxazoline) and azabis(oxazoline) ligands have been immobilized by non-covalent interactions on mesoporous materials. The presence of negative charges achieved by the isomorphous substitution of silicon by aluminium is required to retain the complexes on the support. Cation-exchange was found to be not as efficient as observed with layered clays, and produce catalysts which lose their chiral ligand and give low enantioselectivity. A method employing incipient wetness produces more stable catalysts, whose activity varies to some extent according to the structure of the mesoporous material on which it is supported, and the nature of the chiral ligand. © 2014 Elsevier B.V.
Versión del editorhttp://dx.doi.org/10.1016/j.apcata.2014.07.030
URIhttp://hdl.handle.net/10261/111780
DOI10.1016/j.apcata.2014.07.030
Identificadoresdoi: 10.1016/j.apcata.2014.07.030
issn: 0926-860X
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