US EPA

2301384 

Journal Article 

Photochemical generation of superoxide radial anion in water 

Draper, WM; Crosby, DG 

1983 

Yes 

Journal of Agricultural and Food Chemistry
ISSN: 0021-8561
EISSN: 1520-5118 

HEEP/84/03565 

31 

4 

734-737 

English 

10.1021/jf00118a014 

WOS:A1983QZ53400016 

http://://WOS:A1983QZ53400016
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HEEP COPYRIGHT: BIOL ABS. Superoxide radical anion %W%000004%% formed photochemically in aqueous solutions of aromatic amines (aniline, anthranilic acid and N-acetylanthranilic acid), amino acids (Trp, kynurenine and Tyr), p-cresol and acetophenone. %W%000004%% was detected with the enzyme probe superoxide dismutase. Chemicals that generated %W%000004%% also sensitized the photodechlorination of chloroacetic acid; indole and indole derivatives (Trp and tryptophol), p-cresol, Tyr, anisole, and aniline were active as sensitizers in 300 nm light. Photodechlorination sensitized by Typ was more efficient in deoxygenated solutions, consistent with the view that the displacement of chloride was due to hydrated electrons. Photochemical mechanisms for %W%000004%% production in near-UV light probably involved photoionization of the sensitizer or complete electron transfer in charge-transfer quenching of excited states of the sensitizer or molecular O.