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Light-driven electron transfer between a photosensitizer and a proton-reducing catalyst Co-adsorbed to NiO
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2012 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 134, no 47, 19322-19325 p.Article in journal (Refereed) Published
Abstract [en]

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 H 2 from a molecular catalyst in the absence of a sacrificial donor reagent.

Place, publisher, year, edition, pages
2012. Vol. 134, no 47, 19322-19325 p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-188122DOI: 10.1021/ja3082268ISI: 000311521500004OAI: oai:DiVA.org:uu-188122DiVA: diva2:576645
Available from: 2012-12-13 Created: 2012-12-12 Last updated: 2017-12-06Bibliographically approved

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Ott, SaschaHammarström, Leif

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