NMR property of arrayed K clusters in zeolite LTA with Si/Al=1.5
NMR property of arrayed K clusters in zeolite LTA with Si/Al=1.5
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DOI：
10.1016/j.jpcs.2006.01.082
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发表时间：
2006-05
影响因子：
4
通讯作者：
M. Igarashi;T. Kodaira;T. Shimizu;A. Goto;K. Hashi
中科院分区：
文献类型：
--
作者：
M. Igarashi;T. Kodaira;T. Shimizu;A. Goto;K. Hashi
报道了27al在Si/Al=1.5的载k lta型沸石中的核磁共振性质。未加载样品的单调谱的高频侧随着扩展而发生变化，只是在高频侧由于外部k的加载而向高频方向变化。扩展后的组分的一些核磁共振参数t2和T2*与原始组分不同。由于在Si/Al=1.5的情况下，外部原子的电势比Si/Al=1.0的情况下要浅，因此位移的起源可能归因于吸附K的原子核和电子之间的费米接触相互作用引起的奈特位移。
NMR property of27Al in K-loaded LTA-type zeolite with Si/Al=1.5 is reported. The higher frequency side of the monotonous spectrum of not loaded sample is changed as expanded, only at the higher frequency side, to higher frequency direction by loading of external K. Some NMR parameters, T2and T2*, of the expanded components are different from those of the original one. Since the potential for external atoms is shallower for the case of Si/Al=1.5 than for that of Si/Al=1.0, the origin of the shift may be attributed to Knight shift by Fermi contact interaction between nuclei and electron from adsorbed K.