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Reaction between L-cysteine and 10-methylphenothiazine cation radical released from droplet-modified electrodes

Wadhawan, Jay; Horn, Jason J.; Watson, Andrew; Lewis, Mark; McCreedy, Tom; Wadhawan, Jay D.

Authors

Jason J. Horn

Andrew Watson

Mark Lewis

Tom McCreedy T.McCreedy@hull.ac.uk



Abstract

The electrochemical oxidation of 10-methylphenothiazine (PMe) dissolved in 1,2-trans-dibromocyclohexane oil droplets immobilised on a basal plane pyrolytic graphite (BPPG) electrode and bathed by an aqueous electrolyte is a one-electron quasi-reversible process which occurs with the expulsion of the electro-generated cation radical from the oil phase. In the presence of l-cysteine in the aqueous phase, the electro-released cation mediates the redox catalytic oxidation of the thiol. The peak catalytic current is observed to increase linearly with increasing cysteine concentration over the range analysed (10-100 mM). © 2008 Elsevier B.V. All rights reserved.

Citation

Horn, J. J., Watson, A., Lewis, M., McCreedy, T., & Wadhawan, J. D. (2008). Reaction between L-cysteine and 10-methylphenothiazine cation radical released from droplet-modified electrodes. Electrochemistry communications, 10(9), (1384-1387). doi:10.1016/j.elecom.2008.07.021. ISSN 1388-2481

Journal Article Type Article
Acceptance Date Jul 8, 2008
Online Publication Date Jul 16, 2008
Publication Date 2008-09
Publicly Available Date
Journal ELECTROCHEMISTRY COMMUNICATIONS
Print ISSN 1388-2481
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 10
Issue 9
Pages 1384-1387
DOI https://doi.org/10.1016/j.elecom.2008.07.021
Keywords Droplet-modified electrodes; Thiol detection; Liquid/liquid electrochemistry; Three phase junction
Public URL https://hull-repository.worktribe.com/output/391427
Publisher URL https://www.sciencedirect.com/science/article/pii/S1388248108003044?via%3Dihub