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Electrochemical Parameters of Phenoxazine Derivatives in Solution and at Monolayer‐Modified Gold Electrodes
Author(s) -
Kulys J.,
Krikstopaitis K.,
Scheller F. W.,
Wollenberger U.
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.200302795
Subject(s) - cystamine , phenoxazine , electrochemistry , monolayer , electrode , chemistry , redox , hydrogen peroxide , inorganic chemistry , propylamine , diffusion , combinatorial chemistry , organic chemistry , amine gas treating , medicine , biochemistry , physics , phenothiazine , pharmacology , thermodynamics
Abstract Electrochemical properties of β‐(10‐phenoxazinyl) propylamine (APPX) and β‐(10‐phenoxazinyl) propionic acid (PPX) have been studied in solution, and in immobilized state on gold electrodes modified with monolayers of cystamine and mercaptoundecanoic acid. A reversible diffusion‐controlled process of APPX and PPX was observed at a bare gold electrode. The electrochemical conversion of both compounds at modified gold electrodes was a quasi‐reversible diffusion‐controlled process. The redox potential of immobilized APPX (443 mV) was similar to the potential in solution, while the value of the immobilized PPX was 131 mV higher than in solution. The immobilized mediators were electrocatalytically active in the fungal peroxidase‐catalyzed hydrogen peroxide reduction.