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Light-Driven Electron Transfer between a Photosensitizer and a Proton-Reducing Catalyst Co-adsorbed to NiO
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Applied Physical Chemistry.ORCID iD: 0000-0002-4782-4969
Uppsala University.
Uppsala University.
Uppsala University.
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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 H2 from a molecular catalyst in the absence of a sacrificial donor reagent.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2012. Vol. 134, no 47, 19322-19325 p.
National Category
Physical Chemistry
Research subject
SRA - Energy
Identifiers
URN: urn:nbn:se:kth:diva-105538DOI: 10.1021/ja3082268ISI: 000311521500004OAI: oai:DiVA.org:kth-105538DiVA: diva2:571375
Funder
StandUpKnut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20121127. Updated from Epub ahead of print to published 20131202.

Available from: 2012-11-27 Created: 2012-11-22 Last updated: 2017-12-07Bibliographically approved

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Gardner, James M

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