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A 13 C‐Labeled Triarylmethyl Radical as an EPR Spin Probe Highly Sensitive to Molecular Tumbling
Author(s) -
Poncelet Martin,
Driesschaert Benoit
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202006591
Subject(s) - microviscosity , electron paramagnetic resonance , spin probe , chemistry , rotational correlation time , hyperfine structure , nuclear magnetic resonance , anisotropy , molecular dynamics , site directed spin labeling , chemical physics , molecular physics , atomic physics , computational chemistry , physics , membrane , optics , biochemistry
A stable triarylmethyl spin probe whose electron paramagnetic resonance (EPR) spectrum is highly sensitive to molecular tumbling is reported. The strong anisotropy of the hyperfine coupling tensor with the central carbon of a 13 C 1 ‐labeled triarylmethyl radical enables the measurement of the probe rotational correlation time with applications to measure microviscosity and molecular dynamics.