On the photochemical decomposition of aromatic α-azohydroperoxides

Júlia Vágó, Laszlo Biczók, Gottfried Grabner, Gottfried Köhler, Ruth M. Quint, Nikola Getoff

Research output: Contribution to journalArticle

Abstract

The photochemistry of some α-azohydroperoxides (phenyl(phenylazo)methyl hydroperoxide and its halogenated derivatives) was investigated in various solvents by microsecond and nanosecond flash photolysis methods and steady state product analysis. Photodecomposition of the molecule, demonstrated by the formation of benzaldehyde, is a major, but not the only, photochemical pathway. Investigation of the influence of solvent and substitution on the photoinduced transients provides strong evidence for alternative photoreactions. One of the species produced by flash photolysis was studied in detail and assigned to a transient zwitterion formed from the α-azohydroperoxide by proton transfer via an excited state pathway. Semiempirical calculations add further support to the proposed mechanism.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalJournal of Photochemistry and Photobiology, A: Chemistry
Volume76
Issue number1-2
DOIs
Publication statusPublished - Dec 1 1993

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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