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Kinetic Analysis of a Two‐Phase EC Mechanism with Concomitant Lateral Processes
Author(s) -
Fernández Mariana Adela,
Yudi Lidia Mabel,
Baruzzi Ana María
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302820
Subject(s) - electrochemistry , kinetic energy , azo coupling , chemistry , reaction rate constant , phase (matter) , electron transfer , dichloroethane , reaction mechanism , analytical chemistry (journal) , mass transfer , coupling reaction , kinetics , electrode , organic chemistry , chromatography , catalysis , physics , quantum mechanics
Abstract Electrochemical transfer of azo dye fast red TR across the water/1,2 – dichloroethane (DCE) interface followed by the coupling reaction with 1‐naphthylamine in the organic phase is studied. Pseudo first order rate constants of this reaction were obtained by fitting the experimental I p− / I p+ ratio under different experimental conditions with the theoretical values reported by Nicholson and Shain. The occurrence of lateral processes is demonstrated (partition of the azo dye non assisted by potential and electrochemical transfer of the protons generated in the coupling reaction), which constrains the accurate determination of the kinetic parameters.