The 1H nuclear magnetic resonance (NMR) spectra and the dipolar spin–lattice relaxation time T1D for 1H in the natural natrolite (Na2Al2Si3O10·2H2O) have been measured in the temperature range of 190–390 K. From the temperature transformations of 1H NMR spectra, it follows that at T > 300 K, the diffusion of water molecules along the nano-channels is observed. From experimental T1D data, it follows that the 180° flip motion of the water molecules takes place in natrolite. At low temperature (T < 250 K), the dipolar interaction with paramagnetic impurities as a relaxation mechanism of 1H nuclei becomes significant.

中文翻译：

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Natrolite 纳米通道中的质子偶极自旋晶格弛豫


在190-390 K的温度范围内测量了天然钠沸石（Na2Al2Si3O10·2H2O）中1H的1H核磁共振（NMR）谱和偶极自旋晶格弛豫时间T1D。从1H NMR谱的温度变换，因此在 T > 300 K 时，可以观察到水分子沿纳米通道的扩散。根据 T1D 实验数据，钠沸石中水分子发生 180° 翻转运动。在低温（T < 250 K）下，作为 1H 核弛豫机制的与顺磁杂质的偶极相互作用变得显着。