1H-NMR STUDY OF HYDROGEN INTERCALATED IN β-ZIRCONIUM NITRIDE CHLORIDE
1H-NMR STUDY OF HYDROGEN INTERCALATED IN β-ZIRCONIUM NITRIDE CHLORIDE
复制标题
β-氯化氮化锆插氢的1H-NMR研究
DOI：
10.1080/00958979608023542
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发表时间：
1996
影响因子：
1.9
通讯作者：
M. Ohashi
中科院分区：
文献类型：
--
作者：
H. Kawaji;Kenji Yamamoto;S. Yamanaka;M. Ohashi
摘要 层状结构化合物 β-ZrNCl 在密封石英管中与 NH4Cl 进行化学气相传输时吸收氢气。运输的样品可通过氢气溢出进一步氢化，并通过 Cl2 和 KMnO4 氧化脱氢。红外吸收光谱表明氢被吸收在 β-ZrNCl 的双 ZrN 层中，与氮原子配位。 1H-NMR 谱的二阶矩表明 β-ZrNCl 中形成了氢对。在 200 K 左右的温度下观察到 1 H-NMR 谱的运动线变窄。根据自旋晶格弛豫时间的温度依赖性，确定氢跳跃运动的活化能为 10.6 kJ/mol。提出了氢位置的可能结构模型。
Abstract Hydrogen is taken up by a layer structured compound β-ZrNCl during its chemical vapor transport with NH4Cl in a sealed silica tube. The transported sample can be further hydrogenated by hydrogen spillover, and dehydrogenated by oxidation with Cl2 and KMnO4. The infrared absorption spectra indicate that the hydrogen is taken up in the double ZrN layer of β-ZrNCl, coordinating to a nitrogen atom. The second moments of 1H-NMR spectra suggest the formation of hydrogen pairs in β-ZrNCl. A motional line narrowing of the 1H-NMR spectrum was observed at temperatures around 200 K. The activation energy for the jumping motion of the hydrogen was determined to be 10.6 kJ/mol from the temperature dependence of the spin-lattice relaxation time. A possible structural model for the location of hydrogen was proposed.