Journal
QUIMICA NOVA
Volume 33, Issue 10, Pages 2135-2142Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0100-40422010001000025
Keywords
Schiff base-copper complexes; smectite clays; DFT calculation
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Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [05/60596-8]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Brazilian Synchrotron Light Laboratory (LNLS) [XAS 1186/02]
- Programa Institutos Nacionais de Ciencia e Tecnologia - CNPq/ FAPESP/MCT (INCT Processos Redox em Biomedicina - Redoxoma)
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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.
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