Contributions of Exchange and Dipole–Dipole Interactions to the Shape of EPR Spectra of Free Radicals in Diluted Solutions

This report presents a comprehensive analysis of the contributions of the Heisenberg exchange and dipole–dipole interactions in diluted solutions of nitroxide radicals to the shape of their electron paramagnetic resonance (EPR) spectra taking into account all coherence transfer processes. It is show...

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Bibliographic Details
Published in:Applied magnetic resonance 2010-05, Vol.38 (2), p.237-256
Main Author: Salikhov, K. M.
Format: Article
Language:English
Subjects:
Atoms and Molecules in Strong Fields
Dilution
Dipole interactions
Electron paramagnetic resonance
Electrons
Exchanging
Free radicals
Laser Matter Interaction
Nitrogen
Organic Chemistry
Physical Chemistry
Physics
Physics and Astronomy
Protons
Solid State Physics
Spectra
Spectroscopy/Spectrometry
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Summary:This report presents a comprehensive analysis of the contributions of the Heisenberg exchange and dipole–dipole interactions in diluted solutions of nitroxide radicals to the shape of their electron paramagnetic resonance (EPR) spectra taking into account all coherence transfer processes. It is shown that these contributions interfere. The approaches to obtain the molecular-kinetic and exchange integral parameters by analyzing the EPR spectrum dependence on the radical concentration and the solvent viscosity are discussed.
ISSN:0937-9347
1613-7507
DOI:10.1007/s00723-010-0128-x