Electrochemical Properties of the Oxo-Manganese-Phenanthroline Complex Immobilized on Ion-Exchange Polymeric Film and Its Application as Biomimetic Sensor for Sulfite Ions

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorMachini, Wesley B. S. [UNESP]
dc.creatorTeixeira, Marcos F. S. [UNESP]
dc.date2015-03-18T15:52:33Z
dc.date2015-03-18T15:52:33Z
dc.date2014-10-01
dc.date.accessioned2023-09-09T10:59:50Z
dc.date.available2023-09-09T10:59:50Z
dc.identifierhttp://dx.doi.org/10.1002/elan.201400289
dc.identifierElectroanalysis. Weinheim: Wiley-v C H Verlag Gmbh, v. 26, n. 10, p. 2182-2190, 2014.
dc.identifier1040-0397
dc.identifierhttp://hdl.handle.net/11449/116190
dc.identifier10.1002/elan.201400289
dc.identifierWOS:000343927400014
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8765679
dc.descriptionA biomimetic sensor containing the oxo-bridged dinuclear manganese-phenanthroline complex incorporated into a cation-exchange polymeric film deposited onto glassy carbon electrode for detection of sulfite was studied. Cyclic voltammetry at the modified electrode in universal buffer showed a two electron oxidation/reduction of the couple Mn-IV(mu-O)(2)Mn-IV/Mn-III(mu-O)(2)Mn-III. The sensor exhibited electrocatalytic property toward sulfite oxidation with a decrease of the overpotential of 450 mV compared with the glassy carbon electrode. A plot of the anodic current versus the sulfite concentration for potential fixed (+0.15 V vs. SCE) at the sensor was linear in the 4.99 x 10(-7) to 2.49 x 10(-6) mol L-1 concentration range and the concentration limit was 1.33 x 10(-7) mol L-1. The mediated mechanism was derived by Michaelis-Menten kinetics. The calculated kinetics values were Michaelis-Menten rate constant=K-M(app)=1.33 mu mol L-1, catalytic rate constant=6.06 x 10(-3) s(-1) and heterogeneous electro-chemical rate constant=3.61 x 10(-5) cm s(-1).
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionSao Paulo State Univ UNESP, Fac Sci & Technol, Dept Phys Chem & Biol, Presidente Prudente, SP, Brazil
dc.descriptionSao Paulo State Univ UNESP, Fac Sci & Technol, Dept Phys Chem & Biol, Presidente Prudente, SP, Brazil
dc.descriptionFAPESP: 05/01296-4
dc.descriptionFAPESP: 13/10469-6
dc.format2182-2190
dc.languageeng
dc.publisherWiley-Blackwell
dc.relationElectroanalysis
dc.relation2.851
dc.relation0,692
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBiomimetic oxo-manganese complex
dc.subjectBiomimetic activity
dc.subjectElectrocatalytic sulfite sensor
dc.titleElectrochemical Properties of the Oxo-Manganese-Phenanthroline Complex Immobilized on Ion-Exchange Polymeric Film and Its Application as Biomimetic Sensor for Sulfite Ions
dc.typeArtigo


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