Fading of alizarin and related artists' pigments by atmospheric ozone: reaction products and mechanisms

Experiments were conducted to identify major products formed upon exposure of selected pigments to ozone. The colorants alizarin and alizarin crimson and their simple structural homologue anthraquinone were analyzed. A chemical mechanism responsible for the fading of alizarin-related colorants is pr...

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Bibliographic Details
Published in:Environmental science & technology 1987-07, Vol.21 (7), p.635-643
Main Authors: Grosjean, Daniel, Whitmore, Paul M, De Moor, C. Pamela, Cass, Glen R, Druzik, James R
Format: Article
Language:English
Subjects:
Applied sciences
Chemical industry and chemicals
Dyes, pigments
Exact sciences and technology
Industrial chemicals
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Summary:Experiments were conducted to identify major products formed upon exposure of selected pigments to ozone. The colorants alizarin and alizarin crimson and their simple structural homologue anthraquinone were analyzed. A chemical mechanism responsible for the fading of alizarin-related colorants is proposed that is consistent with the products distribution, observed reactivity sequence, and observed substrate-specific effects. The potential application to predicting O 3 fastness to other alizarin-related pigments is discussed.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00161a003