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Photosensitized electron-transfer reaction in the first excited singlet state of a polymethine-cyanine dye

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100297a013· OSTI ID:6135532
The electron transfer from the first excited singlet state of a polymethine-cyanine dye, 3,3'-diethyloxadicarbocyanine iodide (DODCI), to methylviologen leads to redox products, which have been fully characterized by using an electron acceptor, p-benzoquinone (p-BQ), and an electron donor, ascorbic acid. The quantum yields of the redox products have been measured by using the DODCI photoisomerization process as an internal actinometer. A complete reaction scheme is proposed and the various reaction rate constants have been determined. The photosystem DODCI-MVCl/sub 2/-p-BQ-ascorbic acid is presented as a new system for the modeling of solar energy conversion.
Research Organization:
CNRS, Gif-s-Yvette, France
OSTI ID:
6135532
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:13; ISSN JPCHA
Country of Publication:
United States
Language:
English