Premium
The Electrochemical Oxidation of 5‐Thio‐2‐nitrobenzoic acid (TNBA) at a Boron Doped Diamond Electrode: Demonstration of a CEC Reaction
Author(s) -
Nekrassova Olga,
Lawrence Nathan S.,
Compton Richard G.
Publication year - 2003
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.200302766
Subject(s) - moiety , thio , chemistry , deprotonation , cyclic voltammetry , electrochemistry , inorganic chemistry , redox , electrode , boron , thiol , diamond , organic chemistry , ion
The oxidation of 5‐thio‐2‐nitrobenzoic acid (TNBA) over a wide pH range has been investigated using cyclic voltammetry at a boron doped diamond electrode. The reaction has been shown to proceed via a CEC reaction process in which at lower pH the thiol moiety of the TNBA species has to undergo deprotonation before oxidation. DIGISIM modelling of the voltammetric profiles deduced a value of 5.2 for the pK a of the thiol moiety which is in good agreement with that obtained from spectrophotometric data. Also reported are the rate constants for all the heterogeneous and homogeneous processes.