On the problem of field-gradient NMR measurements of intracrystalline diffusion in small crystallites - Water in NaA zeolites as an example

被引：7
作者：
Gutsze, A
Masierak, W
Geil, B
Kruk, D
Pahlke, H
Fujara, F
机构：
[1] Tech Univ Darmstadt, Fachbereich Phys, D-64289 Darmstadt, Germany
[2] Med Acad Bydgoszcz, Dept Biophys, PL-85067 Bydgoszcz, Poland
[3] Acad Bydgoszcz, PL-85072 Bydgoszcz, Poland
[4] Univ Dortmund, Fachbereich Phys, D-44221 Dortmund, Germany
[5] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland
来源：
SOLID STATE NUCLEAR MAGNETIC RESONANCE | 2005年 / 28卷 / 2-4期
关键词：
zeolites; diffusion; field-gradient NMR;
D O I：
10.1016/j.ssnmr.2005.10.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Necessary conditions for measuring intracrystalline diffusion in small crystal size systems via field-gradient NMR are discussed. As an illustrative case self-diffusion coefficients of water adsorbed in NaA zeolites (average crystal diameter about 1 mu m) have been measured by H-1-NMR stimulated echoes in static magnetic field gradients of up to 180 T/m in the temperature range of 254-344K. Obtaining intracrystalline diffusion coefficients necessitates a sufficiently high spatial resolution only provided by such large field gradients. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码：244 / 249
页数：6
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