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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus

12 Issues per year

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Volume 226, Issue 11-12


NMR Study of Local and Long Range Dynamics of Adsorbed Water in Zeolite NaY(Br)

Hannes Pahlke / Sorin Adrian Lusceac / Burkhard Geil
  • Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Göttingen, Deutschland
  • Other articles by this author:
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/ Franz Fujara
Published Online: 2012-09-24 | DOI: https://doi.org/10.1524/zpch.2012.0301


The dynamics of partially deuterated water in zeolite NaY(Br) are investigated by a combination of several NMR methods for two different loadings, 4 water molecules and 18 water molecules per supercage. Information on local dynamics is obtained by 1H and 2H NMR spin-lattice relaxation, 2H NMR solid-echo spectra and 2H NMR stimulated echo decay curves. The water long range diffusion has been studied by 1H NMR static field gradient experiments. The most important findings are as follows: The mechanism of water dynamics depends strongly on the degree of loading. This is clearly reflected in both, local and long range motion. The intermediate 2H NMR spectra might be explained referring to a model proposed by O'Hare et al.: It is based on two different populations of water molecules performing tetrahedral jumps respectively C2-flips of their OH bonds. Alternative models for the local water dynamics, distorted tetrahedral jumps and a distribution of correlation times, are also discussed.

Keywords: NMR; Water Dynamics; Zeolite NaY; Spectra; Relaxation

About the article

* Correspondence address: Technische Universität Darmstadt, Institut für Festkörperphysik, Hochschulstraße 6, 64289 Darmstadt, Deutschland,

Published Online: 2012-09-24

Published in Print: 2012-12-01

Citation Information: Zeitschrift für Physikalische Chemie, Volume 226, Issue 11-12, Pages 1093–1114, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1524/zpch.2012.0301.

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