Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Photochemistry in Aqueous Surface Layers: 1-Naphthol.
Author Larson, R. A. ; Rounds, S. A. ;
CORP Author Environmental Research Lab., Athens, GA. ;Illinois Univ. at Urbana-Champaign.
Year Published 1986
Report Number EPA/600/D-86/228;
Stock Number PB87-105615
Additional Subjects Napthols ; Napthalene compounds ; Photolysis ; Cyclohexane ; Chemical reactions ; Photochemistry ; Chemical reaction mechanisms
Library Call Number Additional Info Location Last
NTIS  PB87-105615 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 14p
1-Naphthol was reactive toward direct photolysis in buffered aqueous solutions (at pH 7, halflife in sunlight was about 90 min) and in cyclohexane (halflife about 15 min). The reaction rate in water increased with pH. The mechanisms of the principal photolysis pathways in both solvents did not involve singlet oxygen. In aqueous solution, the major ether-extractable product, lawsone, may have been formed by a radical process involving 1,2-naphthoquinone and superoxide as intermediates. In cyclo-hexane, most of the photolysis products observed were very polar. Several oxygen-containing compounds derived from the solvent were also observed. In a two-phase system including cyclo-hexane and pH 7 buffer, the photolysis appeared to proceed by independent mechanisms in both phases, but intermediate polar products formed in the organic layer diffused into the aqueous layer. In a system containing a surface-active material, SDS, the rate of photolysis decreased; the photoproducts were typical of those observed in cyclo-hexane rather than water.