On the photochemical decomposition of aromatic α-azohydroperoxides

Júlia Vágó, L. 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

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Photolysis
flash
photolysis
Decomposition
decomposition
photodecomposition
zwitterions
Proton transfer
Photochemical reactions
Excited states
photochemical reactions
Hydrogen Peroxide
Substitution reactions
substitutes
Derivatives
Molecules
protons
products
excitation
molecules

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

Cite this

On the photochemical decomposition of aromatic α-azohydroperoxides. / Vágó, Júlia; Biczók, L.; Grabner, Gottfried; Köhler, Gottfried; Quint, Ruth M.; Getoff, Nikola.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 76, No. 1-2, 01.12.1993, p. 69-76.

Research output: Contribution to journalArticle

Vágó, Júlia ; Biczók, L. ; Grabner, Gottfried ; Köhler, Gottfried ; Quint, Ruth M. ; Getoff, Nikola. / On the photochemical decomposition of aromatic α-azohydroperoxides. In: Journal of Photochemistry and Photobiology A: Chemistry. 1993 ; Vol. 76, No. 1-2. pp. 69-76.
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