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Electron spin resonance study of donor-acceptor sites in Zr-montmorillonite

Published online by Cambridge University Press:  09 July 2018

J. V. Zanchetta ,
A. Matrod-Bashi  and
F. Figueras
J. V. Zanchetta
Affiliation:
Université de Montpellier II Sciences et Techniques du Languedoc, Laboratoire de Physicochimie des Matériaux, Equipe de Chimie Physique (URA D0407 CNRS), Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
A. Matrod-Bashi
Affiliation:
Université de Montpellier II Sciences et Techniques du Languedoc, Laboratoire de Physicochimie des Matériaux, Equipe de Chimie Physique (URA D0407 CNRS), Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
F. Figueras
Affiliation:
Université de Montpellier II Sciences et Techniques du Languedoc, Laboratoire de Physicochimie des Matériaux, Equipe de Chimie Physique (URA D0407 CNRS), Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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Abstract

The charge transfer process that occurs in two samples of Wyoming montmorillonite of different grain size pillared with Zr by interaction with perylene (Pe) and tetracyanoethylene (TCNE) has been studied. These smectites are strongly affected by the exchange of Zr and appear to be strong electron acceptors and weak donors. The ESR results show that their ability to form charge transfer radicals is related to the details of preparation, which most probably control the accessibility of Pe and TCNE to the internal surface.

Type
Research Article
Information
Clay Minerals , Volume 27 , Issue 3 , September 1992 , pp. 343 - 351
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1992

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