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(23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite
Temperature dependencies of (27)Al and (23)Na nuclear magnetic resonance spectra and spin–lattice relaxations in mordenite have been studied in static and magic angle spinning regimes. Our data show that the spin–lattice relaxations of the (23)Na and (27)Al nuclei are mainly governed by interaction...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Vienna
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5258800/ https://www.ncbi.nlm.nih.gov/pubmed/28179750 http://dx.doi.org/10.1007/s00723-016-0847-8 |
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author | Sergeev, N. A. Paczwa, M. Olszewski, M. Panich, A. M. |
author_facet | Sergeev, N. A. Paczwa, M. Olszewski, M. Panich, A. M. |
author_sort | Sergeev, N. A. |
collection | PubMed |
description | Temperature dependencies of (27)Al and (23)Na nuclear magnetic resonance spectra and spin–lattice relaxations in mordenite have been studied in static and magic angle spinning regimes. Our data show that the spin–lattice relaxations of the (23)Na and (27)Al nuclei are mainly governed by interaction of nuclear quadrupole moments with electric field gradients of the crystal, modulated by translational motion of water molecules in the mordenite channels. At temperatures below 200 K, the dipolar interaction of nuclear spins with paramagnetic impurities becomes an important relaxation mechanism of the (23)Na and (27)Al nuclei. |
format | Online Article Text |
id | pubmed-5258800 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer Vienna |
record_format | MEDLINE/PubMed |
spelling | pubmed-52588002017-02-06 (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite Sergeev, N. A. Paczwa, M. Olszewski, M. Panich, A. M. Appl Magn Reson Original Paper Temperature dependencies of (27)Al and (23)Na nuclear magnetic resonance spectra and spin–lattice relaxations in mordenite have been studied in static and magic angle spinning regimes. Our data show that the spin–lattice relaxations of the (23)Na and (27)Al nuclei are mainly governed by interaction of nuclear quadrupole moments with electric field gradients of the crystal, modulated by translational motion of water molecules in the mordenite channels. At temperatures below 200 K, the dipolar interaction of nuclear spins with paramagnetic impurities becomes an important relaxation mechanism of the (23)Na and (27)Al nuclei. Springer Vienna 2016-11-09 2017 /pmc/articles/PMC5258800/ /pubmed/28179750 http://dx.doi.org/10.1007/s00723-016-0847-8 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Original Paper Sergeev, N. A. Paczwa, M. Olszewski, M. Panich, A. M. (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite |
title | (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite |
title_full | (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite |
title_fullStr | (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite |
title_full_unstemmed | (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite |
title_short | (23)Na and (27)Al NMR Study of Structure and Dynamics in Mordenite |
title_sort | (23)na and (27)al nmr study of structure and dynamics in mordenite |
topic | Original Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5258800/ https://www.ncbi.nlm.nih.gov/pubmed/28179750 http://dx.doi.org/10.1007/s00723-016-0847-8 |
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