In:
Concepts in Magnetic Resonance Part A, Wiley, Vol. 45A, No. 5 ( 2016-09)
Abstract:
Electron paramagnetic resonance spectra of nitroxide radicals are reporters of molecular tumbling correlation times. The concepts of electron paramagnetic resonance and molecular tumbling are demonstrated by examination of spectra of the radical tempol (4‐hydroxy‐2,2,6,6‐tetramethylpiperidin‐1‐oxyl) in water:glycerol mixtures. Analysis of the spectral line shapes with the Kivelson model and computer simulation with EasySpin are discussed. Values of the tumbling correlation times obtained by the two methods are shown to be in good agreement. Comparison of the experimental tumbling correlation times with values calculated with the Stokes‐Einstein model indicates a slip coefficient of 0.066, which is consistent with other reports for nitroxides in various solvents.
Type of Medium:
Online Resource
ISSN:
1546-6086
,
1552-5023
DOI:
10.1002/cmr.a.2016.45A.issue-5
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
1500222-6
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