Light-Driven Electron Transfer between a Photosensitizer and a Proton-Reducing Catalyst Co-adsorbed to NiO
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
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.
Research subject SRA - Energy
IdentifiersURN: urn:nbn:se:kth:diva-105538DOI: 10.1021/ja3082268ISI: 000311521500004OAI: oai:DiVA.org:kth-105538DiVA: diva2:571375
FunderStandUpKnut and Alice Wallenberg FoundationSwedish Research Council
QC 20121127. Updated from Epub ahead of print to published 20131202.2012-11-272012-11-222013-12-02Bibliographically approved