occurring as a result of an electron exchange mechanism. It requires an overlap of
the wavefunctions of the energy donor and the energy acceptor. It is the dominant
mechanism in triplet-triplet energy transfer
. The transfer rate constant
, is given by:
is the distance between donor (D) and acceptor (A),
are constants not easily related to experimentally determinable quantities, and
is the spectral overlap
integral. For this mechanism the spin conservation rules are obeyed.
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2235
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook