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Journal of the Chilean Chemical Society

On-line version ISSN 0717-9707

Abstract

ARMIJO, FRANCISCO; CANALES, LUIS I; DEL RIO, RODRIGO  and  DEL VALLE, Mª ANGÉLICA. POLY-0-AMINOPHENOL OBTAINED AT HIGH POTENTIALS BY CYCLIC VOLTAMMETRY ON SN02: F ELECTRODES: APPLICATION IN QUANTITATIVE DETERMINATION OF ASCORBIC ACID. J. Chil. Chem. Soc. [online]. 2009, vol.54, n.2, pp.158-162. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072009000200014.

In the present work the obtention of poly-o-aminophenol (POAP) at high potentials on conducting glass (Sn02: F) is reported. The synthesis was carried out by continuous potential cycling in a 1 x 10-3M o-aminophenol (OAP), 0.1 M hydrochloric acid, and 0.1 M potassium chloride solution between-0.2 and 1.5 V at 0.05 V-s-1 vs Ag | AgC1. The polymer growth was followed by cyclic voltammetry, UV-vis spectra, and AFM characterization. The SnO2: F modified electrode (SnO2: F/POAP) was tested in the electro-oxidation of ascorbic acid (AA) in phosphate buffer solution. This coating showed an important electrocatalytic effect because a negative anodic shift of 0.4 V with respect to abare SnO2: F glass electrode was observed.

Keywords : Fluor-doped Tin oxide; o-aminophenol; Electropolymerization; Ascorbic acid; Electrocatalysis; Modified electrode.

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