Electrochemical reduction of 2,6-diphenylpyrylium cations by spin-polarized electrons on p-GaAs photocathodes

The electrochemical reduction of 2,6-diphenylpyrylium cations on p-GaAs photocathodes was carried out under conditions of optical orientation of electron spins in the semiconductor. Optical orientation caused spin-polarization of the pyranyl radicals formed on p-GaAs and thereby hindered the rate of...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 1993-03, Vol.346 (1), p.353-366
Main Authors: Modestov, A.D., Kazarinov, V.E.
Format: Article
Language:English
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Summary:The electrochemical reduction of 2,6-diphenylpyrylium cations on p-GaAs photocathodes was carried out under conditions of optical orientation of electron spins in the semiconductor. Optical orientation caused spin-polarization of the pyranyl radicals formed on p-GaAs and thereby hindered the rate of the following stage of radical dimerization, decreasing the rate of the overall process. The reliability of the effect of spin-polarization was proved by comparison with reduction processes in systems where spin-polarization of radicals does not occur or does not affect the rate of the reduction process.
ISSN:1572-6657
1873-2569
DOI:10.1016/0022-0728(93)85024-B