Electrocatalytic activity in sensing of nitrite by films produced by electropolymerization of [Fe(Br-ph-tpy)(2)](2+)

Autor(es)

Bonacin, Juliano A. ; Toma, Sergio. H. ; Nakamura, Marcelo ; Toma, Henrique E.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Coordination Chemistry; v. 70, n. 7, p. 1137-1145, 2017.
• Citações Web of Science: 0

Resumo

Nitrite is a preservative agent broadly used in the food industry. Its excessive consumption can cause several diseases including cancer. Thus, the development of sensors for nitrite is indispensable for strict nitrite level control in industrialized products and consequently for human welfare. Herein, is presented a study of the modification of electrodes by electropolymerization of {[}Fe(Br-ph-tpy)(2)](PF6)(2) and its use as electroactive films in sensing of nitrite. The films were characterized by cyclic voltammetry, electrochemical quartz crystal microbalance, atomic-force microscopy and they were employed in electroanalytical experiments. The film obtained by electropolymerization exhibited some fibers dispersed on the substrate, reflecting the formation polymers on the surface of the electrode. The electrodes were further improved by drop casting a film of the complex on a glass carbon electrode, and then performing the electropolymerization of the complex. An increase in stability and a 41% enhancement of the electrocatalytical response for nitrite ions have been observed, in comparison with the bare electrode. {[}GRAPHICS] . (AU)

• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 02/07066-2 - Desenvolvimento de sistemas supramoleculares metal-orgânicos com unidades periféricas funcionalizadas
• Beneficiário: Juliano Alves Bonacin
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto