Artículos de revistas
Evaluation of the Oxo-bridged Dinuclear Ruthenium Ammine Complex as Redox Mediator in an Electrochemical Biosensor
Fecha
2016-03-01Registro en:
Electroanalysis, v. 28, n. 3, p. 562-569, 2016.
1521-4109
1040-0397
10.1002/elan.201500479
2-s2.0-84941584885
Autor
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
Institución
Resumen
The mediation of electron-transfer by oxo-bridged dinuclear ruthenium ammine [(bpy)2(NH3)RuIII(μ-O)RuIII(NH3)(bpy)2]4+ for the oxidation of glucose was investigated by cyclic voltammetry. These ruthenium (III) complexes exhibit appropriate redox potentials of 0.131-0.09V vs. SCE to act as electron-transfer mediators. The plot of anodic current vs. the glucose concentration was linear in the concentration range between 2.52×10-5 and 1.00×10-4molL-1. Moreover, the apparent Michaelis-Menten kinetic (KM app) and the catalytic (Kcat) constants were 8.757×10-6molL-1 and 1,956s-1, respectively, demonstrating the efficiency of the ruthenium dinuclear oxo-complex [(bpy)2(NH3)RuIII(μ-O)RuIII(NH3)(bpy)2]4+ as mediator of redox electron-transfer.