23Na and 27Al NMR Study of Structure and Dynamics in Mordenite

被引：4

作者：

Sergeev, N. A. ^{[1
]}

Paczwa, M. ^{[1
]}

Olszewski, M. ^{[1
]}

Panich, A. M. ^{[2
]}

机构：

[1] Univ Szczecin, Inst Phys, PL-70451 Szczecin, Poland

[2] Ben Gurion Univ Negev, Dept Phys, POB 653, IL-8410501 Beer Sheva, Israel

来源：

APPLIED MAGNETIC RESONANCE | 2017年 / 48卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SPIN-LATTICE-RELAXATION; NUCLEI; SPECTROSCOPY; DIFFUSION; MOLECULES;

D O I：

10.1007/s00723-016-0847-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Temperature dependencies of Al-27 and Na-23 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 Na-23 and Al-27 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 Na-23 and Al-27 nuclei.

引用

页码：115 / 124

页数：10