Parameter describing the time-dependence of the tumbling of a molecular entity in a medium of
viscosity
as originally defined by
Debye, and used by Perrin in the original
development of the theories of rotational motion of fluorophores.
Note:
Related to the rotational correlation time,
,
by
.
Thus, in the case of a spherically emitting species reorienting itself in a homogeneous fluid,
,
with
the
rotational diffusion coefficient.
Source:
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 416
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.
doi:10.1351/goldbook.
in centrifugation
