Otro
Spectroscopic characterization of schiff base-copper complexes immobilized in smectite clays
Registro en:
Química Nova. Sociedade Brasileira de Química, v. 33, n. 10, p. 2135-2142, 2010.
0100-4042
10.1590/S0100-40422010001000025
S0100-40422010001000025
S0100-40422010001000025.pdf
Autor
Dias, Patrícia M.
Kinouti, Lilian
Constantino, Vera R. L.
Ferreira, Ana M. D. C.
Gonçalves, Marcos B.
Nascimento, Rafael R. do
Petrilli, Helena M.
Caldas, Marília
Frem, Regina C. G.
Resumen
Herein, the immobilization of some Schiff base-copper(II) complexes in smectite clays is described as a strategy for the heterogenization of homogeneous catalysts. The obtained materials were characterized by spectroscopic techniques, mostly UV/Vis, EPR, XANES and luminescence spectroscopy. SWy-2 and synthetic Laponite clays were used for the immobilization of two different complexes that have previously shown catalytic activity in the dismutation of superoxide radicals, and disproportionation of hydrogen peroxide. The obtained results indicated the occurrence of an intriguing intramolecular redox process involving copper and the imine ligand at the surface of the clays. These studies are supported by computational calculations. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)