Author(s):
Oliveira-Brett, Ana Maria 
; Silva, Luís Antônio da ; Brett, Christopher M. A.
Date: 2002
Persistent ID: http://hdl.handle.net/10316/10444
Origin: Estudo Geral - Universidade de Coimbra
Document details
Adsorption of Guanine, Guanosine, and Adenine at Electrodes Studied by Differen...
Description
Guanine, guanosine, and adenine have been electrochemically oxidized at a glassy carbon electrode in aqueous solution. Electrochemical impedance is shown to be a valuable probe of adsorption of the oxidation products on the electrode surface. Voltammetric and impedance studies at different concentrations have been carried out. Correlation between the results for the different compounds helps in understanding the adsorption process and the preconcentration properties of purine bases. Irradiation with ultrasound during recording of the impedance spectrum enabled adsorption to be avoided and the electrode process of the solution-soluble species to be investigated, and oxidation rate constants were calculated. http://dx.doi.org/10.1021/la010980g
Guanine, guanosine, and adenine have been electrochemically oxidized at a glassy carbon electrode in aqueous solution. Electrochemical impedance is shown to be a valuable probe of adsorption of the oxidation products on the electrode surface. Voltammetric and impedance studies at different concentrations have been carried out. Correlation between the results for the different compounds helps in understanding the adsorption process and the preconcentration properties of purine bases. Irradiation with ultrasound during recording of the impedance spectrum enabled adsorption to be avoided and the electrode process of the solution-soluble species to be investigated, and oxidation rate constants were calculated. http://dx.doi.org/10.1021/la010980g
Document Type
Article
Language English
Language English
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