Issue 19, 1990
From the journal:

Journal of the Chemical Society, Faraday Transactions

Electron paramagnetic resonance of coals. New approaches to an old problem with multifrequency electron paramagnetic resonance and spin echo

A. Yu. Bresgunov,   A. A. Dubinsky,   O. G. Poluektov,   G. A. Vorob'eva  and  Ya. S. Lebedev  

Abstract

The origin of spin paramagnetism of coals is still under question as well as its correlation with chemical and technological properties of different coals. Recent applications of high-frequency EPR (150 GHz) together with electron spin echo at 10 GHz revealed new details about the EPR signals of conjugated aromatic hydrocarbon radicals in coal. The shape of the high-frequency EPR spectra clearly demonstrates both g anisotropy and ‘strain broadening’ caused by different local g shifts for non-equivalent radical centres. T1 and T2 values, as measured by two- and three-pulse spin echo, depend on the degree of excitation of inhomogeneous spectra.

The model of strong spin exchange between centres with different conjugation areas is suggested in order to explain observed effects.

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/FT9908603185
Article type
Paper

J. Chem. Soc., Faraday Trans., 1990,86, 3185-3189

Permissions

Request permissions

Electron paramagnetic resonance of coals. New approaches to an old problem with multifrequency electron paramagnetic resonance and spin echo

A. Yu. Bresgunov, A. A. Dubinsky, O. G. Poluektov, G. A. Vorob'eva and Ya. S. Lebedev, J. Chem. Soc., Faraday Trans., 1990, 86, 3185 DOI: 10.1039/FT9908603185

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements