Study of a gold electrode modified by trans-[Ru(NH(3))(4)(Ist)SO(4)](+) to produce an electrochemical sensor for nitric oxide
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2011
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Resumo |
The modification of a gold electrode surface by electropolymerization of trans-[Ru(NH(3))(4)(Ist)SO(4)](+) to produce an electrochemical sensor for nitric oxide was investigated. The influence of dopamine, serotonin and nitrite as interferents for NO detection was also examined using square-wave voltammetry (SWV). The characterization of the modified electrode was carried out by cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM) and SERS techniques. The gold electrode was successfully modified by the trans-[Ru(NH(3))(4)(Ist)SO(4)](+) complex ion using cyclic voltammetry. The experiments show that a monolayer of the film is achieved after ten voltammetric cycles, that NO in solution can coordinate to the metal present in the layer, that dopamine, serotonin and nitrite are interferents for the detection of NO, and that the response for the nitrite is much less significant than the responses for dopamine and serotonin. The proposed modified electrode has the potential to be applied as a sensor for NO. (C) 2011 Elsevier Ltd. All rights reserved. Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CNPq CAPES[PROCAD NF 2424/2008] Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) CAPES[0316083] Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) CAPES[proc. 551663/2010-3] Financiadora de Estudos e Projetos (FINEP) FINEP (Brazil) |
Identificador |
ELECTROCHIMICA ACTA, v.56, n.16, p.5686-5692, 2011 0013-4686 http://producao.usp.br/handle/BDPI/31716 10.1016/j.electacta.2011.04.033 |
Idioma(s) |
eng |
Publicador |
PERGAMON-ELSEVIER SCIENCE LTD |
Relação |
Electrochimica Acta |
Direitos |
restrictedAccess Copyright PERGAMON-ELSEVIER SCIENCE LTD |
Palavras-Chave | #EQCM #Cyclic voltammetry #Square-wave voltammetry #SERS #Ruthenium complex #GLASSY-CARBON ELECTRODES #C-BOUND IMIDAZOLES #RU-II COMPLEXES #ELECTROCATALYTIC OXIDATION #NO RELEASE #RUTHENIUM COMPLEXES #ENDOTHELIAL-CELLS #FILMS #MICROELECTRODE #REDUCTION #Electrochemistry |
Tipo |
article original article publishedVersion |