Proton-assisted photoinduced electron transfer from porphyrin to quinone: A photo-CIDNP and laser flash photolysis study

Devens Gust, Thomas A. Moore, Ana L. Moore, Xiaochun C. Ma, Ronald A. Nieman, Gilbert R. Seely, Robert E. Belford, Jeffery E. Lewis

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The mechanism of proton-assisted photoinduced electron transfer from porphyrins to quinones has been investigated by a combination of NMR, photo-CIDNP, laser flash photolysis, and UV-vis absorption techniques. In aromatic solvents containing trifluoroacetic acid, the electron-donor species was found to be the triplet state of the porphyrin dication rather than that of the free-base porphyrin itself. In addition, reaction of the porphyrin dication triplet state with the protonated quinone species QH+, rather than Q, was found to be responsible for the observed electron transfer and the resulting CIDNP signals.

Original languageEnglish
Pages (from-to)4442-4445
Number of pages4
JournalJournal of physical chemistry
Volume95
Issue number11
DOIs
Publication statusPublished - 1991

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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