Atividade eletrocatalítica de sistemas biomiméticos da enzima catalase

AUTOR(ES)

Matos, Iorquirene de Oliveira, Alves, Wendel A, Nascimento, Otaciro R

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2011-09

RESUMO

In this work, we describe the immobilization of the dinuclear compound [Cu2(apyhist)2Cl2](ClO4)2 (1) and its derived cations complexes, obtained in water solution or by deprotonation of the imidazolate moiety in the ligand leading to a cyclic tetranuclear species, in the Nafion® membrane on glass carbon electrode surface. After that, we studied the influence of the equilibrium in the electrocatalytic activity towards the reduction of H2O2 in the development of an amperometric sensor for the analytical determination of hydrogen peroxide. This strategy proved successful, and the electrochemical behaviour of the all complexes formed within the Nafion® coatings was characterized. We also provide evidence that its related cyclic tetranuclear imidazolate-bridged complex acts as a catalysts for the intramolecular, two-electron reduction of H2O2.

Documentos Relacionados

• Comportamento da serie homologa dos p-hidroxibenzoatos de aquila em solução e sua interação com sistemas biomimeticos
• Influência de polimorfismos genéticos sobre a atividade da enzima hidroximetilbilano sintase
• Purificação da enzima quitosanase de Bacillus cereus em sistemas de duas aquosas
• Nandrolona aumenta a atividade da enzima conversora de angiotensina em tendões de ratos
• Estudo estrutura-atividade de alguns inibidores da enzima integrase do virus HIV-1