In the context of
radiative energy transfer, the integral,
,
which measures the overlap of the
emission spectrum of the excited donor, D, and the
absorption spectrum of the
ground state acceptor, A;
is the measured normalized emission of D,
,
is the
photon exitance of the donor at wavenumber
, and
is the decadic
molar absorption coefficient of A at wavenumber
.
In the context of
Förster excitation transfer,
is given by:
In the context of
Dexter excitation transfer,
is given by:
In this case
and
,
the
emission spectrum of donor and
absorption spectrum of acceptor, respectively, are both normalized to unity, so that the
rate constant for energy transfer,
, is independent of the
oscillator strength of both transitions (contrast to Förster mechanism).
Source:
PAC, 1996, 68, 2223
(Glossary of terms used in photochemistry (IUPAC Recommendations 1996))
on page 2275
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.
