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.

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. https://doi.org/10.1016/j.elecom.2008.07.021

• Journal Article Type: Article
• Acceptance Date: Jul 8, 2008
• Online Publication Date: Jul 16, 2008
• Publication Date: 2008-09
• 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