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Excited state electron transfer after visible light absorption by the Co(I) state of vitamin B12.
- Source :
- Chemical Communications; 2014, Vol. 50 Issue 87, p13304-13306, 3p
- Publication Year :
- 2014
-
Abstract
- The first example of excited state electron transfer from cob(I)alamin is reported herein. Vitamin B<subscript>12</subscript> was anchored to a mesoporous TiO<subscript>2</subscript> thin film and electrochemically reduced to the cob(I)alamin form. Pulsed laser excitation resulted in rapid excited state electron transfer, k<subscript>et</subscript> > 10<superscript>8</superscript> s<superscript>-1</superscript>, followed by microsecond interfacial charge recombination to re-form cob(I)alamin. The supernucleophilic cob(I)alamin was found to be a potent photoreductant. The yield of excited state electron transfer was found to be excitation wavelength dependent. The implications of this dependence are discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13597345
- Volume :
- 50
- Issue :
- 87
- Database :
- Complementary Index
- Journal :
- Chemical Communications
- Publication Type :
- Academic Journal
- Accession number :
- 100188877
- Full Text :
- https://doi.org/10.1039/c4cc02221a