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

John 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
Publication statusPublished - 1991

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Porphyrins
Photolysis
quinones
porphyrins
flash
photolysis
Protons
electron transfer
protons
Electrons
Lasers
atomic energy levels
lasers
Trifluoroacetic acid
Trifluoroacetic Acid
Quinones
Addition reactions
Nuclear magnetic resonance
nuclear magnetic resonance
acids

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Proton-assisted photoinduced electron transfer from porphyrin to quinone : A photo-CIDNP and laser flash photolysis study. / Gust, John Devens; Moore, Thomas A; Moore, Ana L; Ma, Xiaochun C.; Nieman, Ronald A.; Seely, Gilbert R.; Belford, Robert E.; Lewis, Jeffery E.

In: Journal of Physical Chemistry, Vol. 95, No. 11, 1991, p. 4442-4445.

Research output: Contribution to journalArticle

Gust, John Devens ; Moore, Thomas A ; Moore, Ana L ; Ma, Xiaochun C. ; Nieman, Ronald A. ; Seely, Gilbert R. ; Belford, Robert E. ; Lewis, Jeffery E. / Proton-assisted photoinduced electron transfer from porphyrin to quinone : A photo-CIDNP and laser flash photolysis study. In: Journal of Physical Chemistry. 1991 ; Vol. 95, No. 11. pp. 4442-4445.
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