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Electro-oxidation ofo-aminophenol studied by cyclic voltammetry and surface enhanced Raman scattering (SERS)

Authors
Journal
Journal of Electroanalytical Chemistry
1572-6657
Publisher
Elsevier
Publication Date
Volume
350
Identifiers
DOI: 10.1016/0022-0728(93)80204-u

Abstract

Abstract Cyclic voltammetry and surface enhanced Raman scattering (SERS) spectra were used over a wide pH range to examine the products of o-aminophenol oxidation on a roughened silver electrode. The results of the study indicated that at least two oxidation products are formed at the stationary potential of the electrode. The major product in alkaline and neutral media was identified as 2,2′-dihydroxyazobenzene, a linear dimer formed by NN coupling of o-aminophenol cation radicals. In acidic solutions the cyclic dimer 3-aminophenoxazone formed by CN coupling of o-aminophenol cation radicals dominates on the silver electrode.

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