Light-driven electron transfer between a photosensitizer and a proton-reducing catalyst Co-adsorbed to NiO

James M. Gardner, Maryline Beyler, Michael Karnahl, Stefanie Tschierlei, Sascha Ott, Leif Hammarström

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

While intermolecular hole-hopping along the surface of semiconductors is known, there are no previous examples of electron-hopping between molecules on a surface. Herein, we present the first evidence of electron transfer from the photoreduced sensitizer Coumarin-343 (C343) to complex 1, both bound on the surface of NiO. In solution, 1 has been shown to be a mononuclear Fe-based proton-reducing catalyst. The reduction of 1 is reversible and occurs within 50 ns after excitation of C343. Interfacial recombination between the reduced 1(-) and NiO hole occurs on a 100 μs time scale by non-exponential kinetics. The observed process is the first essential step in the photosensitized generation of H2 from a molecular catalyst in the absence of a sacrificial donor reagent.

Original languageEnglish
Pages (from-to)19322-19325
Number of pages4
JournalJournal of the American Chemical Society
Volume134
Issue number47
DOIs
Publication statusPublished - Nov 28 2012

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Photosensitizing Agents
Photosensitizers
Protons
Electrons
Light
Semiconductors
Catalysts
Genetic Recombination
Semiconductor materials
Molecules
Kinetics
coumarin 343

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Light-driven electron transfer between a photosensitizer and a proton-reducing catalyst Co-adsorbed to NiO. / Gardner, James M.; Beyler, Maryline; Karnahl, Michael; Tschierlei, Stefanie; Ott, Sascha; Hammarström, Leif.

In: Journal of the American Chemical Society, Vol. 134, No. 47, 28.11.2012, p. 19322-19325.

Research output: Contribution to journalArticle

Gardner, James M. ; Beyler, Maryline ; Karnahl, Michael ; Tschierlei, Stefanie ; Ott, Sascha ; Hammarström, Leif. / Light-driven electron transfer between a photosensitizer and a proton-reducing catalyst Co-adsorbed to NiO. In: Journal of the American Chemical Society. 2012 ; Vol. 134, No. 47. pp. 19322-19325.
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