Z/E PHOTOISOMERIZATION OF UROCANIC ACID*

H. Morrison*, D. Avnir, C. Bernasconi, G. Fagan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

The E ⇆ Z photoisomerization of the title compound (UA) (a naturally occurring sunscreen) has been studied in aqueous solution. At a UA concentration of 6mM and using 313nm excitation, φE→z= 0.52, φZ→E= 0.47 and the photostationary state is 34% E. Under these conditions, loss of UA is minimal. Low energy triplet quenchers fail to impede the isomerization, but the reaction can be induced by several triplet sensitizers. The ET for UA is estimated to be approximately 55 kcal/mol.

Original languageEnglish
Pages (from-to)711-714
Number of pages4
JournalPhotochemistry and Photobiology
Volume32
Issue number6
DOIs
StatePublished - Dec 1980
Externally publishedYes

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