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Impressum
(c) 2002 BMO

"Magnetic Field and Temperature Dependencies Shed Light on
the Recombination Kinetics of a Transition Metal Donor/Acceptor System"
T. von Feilitzsch, P. Härter, O. Schiemann, M. E. Michel-Beyerle, U. E. Steiner, P. Gilch
J. Am. Chem. Soc. 127 (2005) 15228


Abstract:
The radical pair recombination of an intramolecular electron-transfer system containing a transition
metal moiety has been addressed by femtosecond spectroscopy. The radical pair is formed by ultrafast
electron transfer (90 fs) from a ferrocene residue to a photoexcited Nile blue moiety. Its recombination
proceeds on the picosecond time scale in a multiexponential fashion. The kinetic pattern is a manifestation
of spin processes competing with electron transfer. Magnetic field effects on these kinetics allow one to
disentangle the two contributions. Their temperature dependencies yield the activation parameters of the
two processes. The discussion focuses on the mechanism of electron spin relaxation. Strong evidence for
the Orbach/Kivelson mechanism will be given.

BMO authors (in alphabetic order):
Peter Gilch

Assoziierte Projekte:
Electron transfer reactions beyond conventional theory


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Letzte Änderung: 2016-09-14 13:34