Gibbs energy dissipated when a system that has undergone '
vertical'
electron transfer
(i.e.,
electron transfer obeying the
Franck–Condon principle) relaxes to the
equilibrium state for its new charge distribution. Commonly the total reorganization
energy
(
)
is written as the sum of an inner contribution
(
)
and an outer contribution
(
)
attributed to nuclear reorganizations
of the redox partners and their environment (solvent), respectively.
Note:
Approximations have been proposed to calculate the value of

taking into account the '
relative permittivity' of the solvent.
Source:
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 414
Cite as:
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.