Voltammetric, chromatographic and mass spectral elucidation of the redox reactions of 1-hydroxypyrene occurring at a screen-printed carbon electrode

Honeychurch, Kevin C.; Hart, John P.; Kirsch, Nicole

Abstract

The electrochemical oxidation of 1-hydroxypyrene (1-OHP) has been studied at a screen-printed carbon electrode (SPCE), by cyclic voltammetry and bulk electrolysis. Cyclic voltammograms exhibited two quasi-reversible pairs of peaks (designated 1a′/1c and 3a/3c) generated from the oxidation of the parent molecule. The nature of the redox reactions were further investigated by observing the effect of scan rate and pH on the voltammetric behaviour; the results suggested that the oxidation reactions giving rise to peaks 1a and 2a involved electrochemical-chemical-electrochemical (ECE) and EECE processes, respectively. Additional studies were carried out by HPLC and GC/MS and the results strongly indicated that the oxidation products were a mixture of several pyrene-quinones. In addition, liquid chromatography/mass spectroscopy (LC/MS) investigations showed that 1-OHP had undergone oxidation reactions to produce several dimers. © 2003 Elsevier Ltd. All rights reserved.

• Journal Article Type: Article
• Publication Date: Mar 15, 2004
• Deposit Date: Apr 12, 2011
• Journal: Electrochimica Acta
• Print ISSN: 0013-4686
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 49
• Issue: 7
• Pages: 1141-1149
• DOI: https://doi.org/10.1016/j.electacta.2003.10.025
• Keywords: 1-hydroxypyrene, screen-printed carbon electrode, LC/MS, GC/MS, dimer, quinones
• Public URL: https://uwe-repository.worktribe.com/output/1065040
• Publisher URL: http://dx.doi.org/10.1016/j.electacta.2003.10.025
• Contract Date: Nov 15, 2016