Issue 11, 2001
From the journal:

Journal of the Chemical Society, Perkin Transactions 2

New insights into mechanisms of dye degradation by one-electron oxidation processes

Jeremy J. F. Coen,a   Andrew T. Smith,a   Luis P. Candeias†b  and  John Oakesc  

a School of Biological Sciences, University of Sussex, Brighton, UK

b Gray Laboratory Cancer Research Trust, PO Box 100, Mount Vernon Hospital, Northwood, Middlesex, UK

c Unilever Research Port Sunlight, Wirral, Merseyside, UK

Abstract

The one-electron transfer oxidation of a series of arylazonaphthol dyes has been investigated by pulse radiolysis techniques. These techniques have been used to measure dye redox potentials and to study the initial phases of dye degradation by detecting and following the fate of reaction intermediates. It is shown that bimolecular reaction of dye radicals generated by one-electron oxidation of the common anion represents a novel and generic route for bleaching of azo dyes. Dye degradation by enzymes such as peroxidase or laccase that also generate dye radicals is likely to proceed by the same route.

Graphical abstract: New insights into mechanisms of dye degradation by one-electron oxidation processes

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Article information

DOI
https://doi.org/10.1039/B105085K
Article type
Paper
Submitted
11 Jun 2001
Accepted
16 Aug 2001
First published
26 Sep 2001

J. Chem. Soc., Perkin Trans. 2, 2001, 2125-2129

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New insights into mechanisms of dye degradation by one-electron oxidation processes

J. J. F. Coen, A. T. Smith, L. P. Candeias and J. Oakes, J. Chem. Soc., Perkin Trans. 2, 2001, 2125 DOI: 10.1039/B105085K

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