Photoselected molecules hindered in their rotation (e.g., in lipid bilayers or liquid
crystals)
do not become randomly oriented even after long time periods. Thus, the
emission anisotropy
does not decay to zero but to a steady value,
,
called residual
emission anisotropy. In the case of a single rotational correlation time,
or
,
the decay of
emission anisotropy following δ-pulse excitation is given by:
where
is the fundamental
emission anisotropy.
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.
