A
stable paramagnetic group (typically a nitryl radical) that is attached to a part of a
molecular entity whose microscopic environment is of interest and may be revealed by the electron spin
resonance (
ESR) spectrum of the spin
label. When a simple
paramagnetic molecular entity is used in this way
without covalent
attachment to the molecular entity of interest it is frequently referred to as a '
spin probe'.
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1166
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.
