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A specific resistance of aminoazo dyes to the oxidative degradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
28405 44074 2007 5 PDF Available
Title
A specific resistance of aminoazo dyes to the oxidative degradation
Abstract

The primary products of one-electron oxidation of the azo dyes, 4-(N,N-diethylamino)azobenzene and 4-(N,N-dimethylamino)-4′-(N,N-diethylamino)azobenzene, have been spectroscopically characterized in cryogenic matrices. The reactivity of the radical cations has been investigated by means of pulse radiolysis in solution at room temperature and in cryogenic glasses. The primary transient products formed upon one-electron oxidation of the dyes are radical cations and alkylamino radicals. The latter products are efficiently scavenged by the dyes resulting in adduct formation. The adducts slowly decay and regenerate the parent dye. Hence the degradation of the dye initiated by one-electron oxidation becomes completely inefficient.

Keywords
Azobenzene dyes; Pulse radiolysis; Cryogenic matrices; Oxidative degradation; Radical cations
First Page Preview
A specific resistance of aminoazo dyes to the oxidative degradation
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issues 2–3, 20 May 2007, Pages 267–271
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering