Document Detail


Light-driven electron transfer between a photosensitizer and a proton-reducing catalyst co-adsorbed to NiO.
MedLine Citation:
PMID:  23140238     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
While inter-molecular 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 bound photosensitizer Coumarin-343 (C343) to a bound complex (1) 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 timescale 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 reagent.
Authors:
James M Gardner; Maryline Beyler; Michael Karnahl; Stefanie Tschierlei; Sascha Ott; Leif Hammarström
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-9
Journal Detail:
Title:  Journal of the American Chemical Society     Volume:  -     ISSN:  1520-5126     ISO Abbreviation:  J. Am. Chem. Soc.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503056     Medline TA:  J Am Chem Soc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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