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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A Novel Hybrid Composite Formed by Reaction of 4,5-Diphenyl-2-Imidazolethiol with Hexacyanoferrate (III) and Subsequent Reaction with Copper (II): Preparation, Characterization and a Voltammetric Application for Determination of L-Glutatione

Author(s):
Silvestrini, Daniela Rodrigues [1] ; Bicalho, Urquisa de Oliveira [1] ; do Carmo, Devaney Ribeiro [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista, Fac Engn Ilha Solteira, Dept Quim Fis, BR-15385000 Ilha Solteira, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: International Journal of Electrochemical Science; v. 9, n. 8, p. 4114-4128, AUG 2014.
Web of Science Citations: 1
Abstract

A novel Hybrid composite formed by interaction of 4,5-Diphenyl-2-Imidazolethiol and copper hexacyanoferrate (III) (CuHDIT) was characterized by Fourier transform infrared spectra (FTIR), x-ray diffraction (XRD), scanning electron and energy dispersive (SEM). CuHDIT was incorporated into a graphite paste electrode and the electrochemical studies were conducted with cyclic voltammetry. The cyclic voltammogram of the modified graphite paste electrode with CuHDIT, showed two redox couple with formal potential E-theta'=0.24 and 0.74 V (vs Ag/AgCl(sat.), KCl, 1.0 mol L-1; v = 20 mV s(-1)), attributed to the Cu+/Cu2+ and Fe2+(CN) 6/Fe3+(CN)(6) redox processes respectively. The redox second redox couple (0.74V) presents an electrocatalytic response for determination of L-Glutatione. The modified electrode showed a linear response from 5.0x10(-5) to 9.0x10(-4) mol L-1. The method showed a detection limit of 5.33x10(-5) mol L-1 with a relative standard deviation of +/- 2% (n = 3) and amperometric sensitivity of 12.52 mA mol L-1. (AU)

FAPESP's process: 12/05438-1 - Development of novel nanostructured organically functionalized hybrid silsesquioxanes: preparation, characterization and its application as a sensor of compounds and ions of environmental and biological interest
Grantee:Devaney Ribeiro Do Carmo
Support Opportunities: Regular Research Grants
FAPESP's process: 12/11306-0 - Electrochemical quantification of analytes of environmental and biological interest, using new materials prepared from functionalized silsesquioxanes.
Grantee:Daniela Silvestrini Fernandes
Support Opportunities: Scholarships in Brazil - Doctorate