无溶剂法合成沸石分子筛机理的固体核磁共振研究

无溶剂法通过很少或不使用溶剂的方式有效地减小了沸石分子筛合成对环境的污染进而实现了分子筛的绿色合成，一些工业上有重要应用的分子筛已经被成功合成。无溶剂法为原位追踪晶化机理提供了最基本的条件，即能够实现对整个反应体系和过程进行的原位研究。我们拟通过固体核磁并结合其他实验技术研究无溶剂法合成沸石分子筛的晶化机理，重点研究无机物种的自组装过程、导向剂的结构导向作用以及微量水在合成过程中的作用，以期对无溶剂法合成沸石分子筛的机理有一个深入的认识，这不仅有助于现有沸石分子筛合成方法的优化，还有助于新结构分子筛的合成。

The solvent-free synthesis zeolite route has attracted much attention for the advantages such as reducing waste production and increasing zeolite yield. Recently this solvent-free synthesis route has been successfully applied to synthesize various aluminosilicate zeolites and silicoaluminophosphate molecular sieves. However, the crystallization mechanism of zeolites is still unclear. Understanding the crystallization mechanism is very important for optimized the solvent-free synthesis method and for designing new functional zeolites. We intend to study the zeolite crystallization process by using in-situ solid-state NMR and other techniques. The solvent-free synthesis route provides a good reaction system for in-situ NMR studies. We will focus on the studies of the self-assembly of structural units,the roles of structural directing agents and the roles of tiny amount of water in the crystallization process.