SPECTROSCOPIC CHARACTERIZATION OF SCHIFF BASE-COPPER COMPLEXES IMMOBILIZED IN SMECTITE CLAYS

Autor(es)

Dias, Patricia M. ^[1] ; Kinouti, Lilian ^[1] ; Constantino, Vera R. L. ^[1] ; Ferreira, Ana M. D. C. ^[1] ; Goncalves, Marcos B. ^[2] ; do Nascimento, Rafael R. ^[2] ; Petrilli, Helena M. ^[2] ; Caldas, Marilia ^[2] ; Frem, Regina C. G.

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Quim Fundamental, Inst Quim, BR-05508900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Química Nova; v. 33, n. 10, p. 2135-2142, 2010.
• Citações Web of Science: 2

Resumo

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. (AU)

• Processo FAPESP: 05/60596-8 - Espécies complexas com potencial aplicação em bioinorgânica, catálise, farmacologia e química ambiental: concepção, preparação, caracterização e reatividade
• Beneficiário: Ana Maria da Costa Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Temático