Free Access
Issue
J. Chim. Phys.
Volume 95, Number 2, February 1998
Page(s) 192 - 195
DOI https://doi.org/10.1051/jcp:1998120
DOI: 10.1051/jcp:1998120


J. Chim. Phys. Vol. 95, N°2  p. 192-195

Field cycling magnetic relaxation study of translational diffusion at surfaces of nanopores

J.-P. Korb1, M. Whaley-Hodges2 and R.G. Bryant2

1  Laboratoire de Physique de la Matière Condensée, CNRS, École Polytechnique, 91128 Palaiseau, France
2  Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901, U.S.A.

Abstract
1H spin-lattice relaxation rates of several aprotic polar liquids on microporous chromatographic glass beads that have paramagnetic ion impurities are recorded over magnetic field strengths using a field-switched magnetic relaxation dispersion spectrometer. The data support quantitatively our theory of nuclear paramagnetic relaxation and give the translational diffusion at the surface of nanopores.

Résumé
Les vitesses de relaxation spin-réseau du proton de différents liquides polaires aprotiques saturant des verres poreux calibrés ont été enregistrées en fonction des intensités de champ magnétique avec un spectromètre à cyclage de champ. Les courbes de dispersion observées s'accordent bien aux prévisions théoriques et permettent d'obtenir le coefficient de diffusion de translation à la surface des nanopores.


Key words: Nuclear relaxation -- field-cycling -- pores -- diffusion
Contents

© EDP Sciences 1998

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