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分子筛中阳离子起着平衡骨架电荷的作用,其大小、所带电荷及所处位置对分子筛的催化及吸附性能有很大影响.~(23)Na核磁共振(NMR)能提供钠离子位置和化学环境的信息.这方面的工作主要集中于用~(23)Na NMR研究钠离子在A型、Y型,丝光沸石中的分布及水合作用的影响.Challoner等人还对Y型分子筛中钠离子的运动性进行了研究.对于Ω型分子筛骨架上硅铝排布的研究做得较多,而对分布于其孔道中Na~+的研究还未见报道.
The cation in the molecular sieve plays a role of balancing the charge of the framework, and its size, charge and location have a great influence on the catalytic and adsorption properties of the molecular sieve. (23) Na nuclear magnetic resonance (NMR) can provide sodium ion position and chemical Environment.The main work in this field focuses on the study of the distribution and hydration of sodium ions in type A, type Y and mordenite by ~ (23) Na NMR.Challoner et al. Ion mobility has been studied.For the study on the arrangement of Si-Al on Ω-type molecular sieve framework, there have been no reports about the distribution of Na ~ + in its pores.