Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/10444
Title: Adsorption of Guanine, Guanosine, and Adenine at Electrodes Studied by Differential Pulse Voltammetry and Electrochemical Impedance
Authors: Brett, Ana Maria Oliveira 
Silva, Luís Antônio da 
Brett, Christopher M. A. 
Issue Date: 19-Mar-2002
Publisher: American Chemical Society
Citation: Langmuir. 18:6 (2002) 2326-2330
Abstract: 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.
URI: http://hdl.handle.net/10316/10444
ISSN: 0743-7463
DOI: 10.1021/la010980g
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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