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Nuclear Magnetic Resonance Spectroscopy for In Situ Monitoring of Porous Materials Formation under Hydrothermal Conditions

机译:核磁共振波谱技术在水热条件下现场监测多孔材料的形成

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摘要

The employment of nuclear magnetic resonance (NMR) spectroscopy for studying crystalline porous materials formation is reviewed in the context of the development of in situ methodologies for the observation of the real synthesis medium, with the aim of unraveling the nucleation and growth processes mechanism. Both liquid and solid state NMR techniques are considered to probe the local environment at molecular level of the precursor species either soluble in the liquid phase or present in the reactive gel. Because the mass transport between the liquid and solid components of the heterogeneous system plays a key role in the synthesis course, the two methods provide unique insights and are complementary. Recent technological advances for hydrothermal conditions NMR are detailed and their applications to zeolite and related materials crystallization are illustrated. Achievements in the field are exemplified with some representative studies of relevance to zeolites, aluminophosphate zeotypes, and metal-organic frameworks.
机译:核磁共振(NMR)光谱技术用于研究结晶性多孔材料的形成,是在用于观察真实合成介质的原位方法开发的背景下进行综述的,目的是阐明成核和生长过程的机理。液态NMR和固态NMR技术都被认为可以在可溶于液相或存在于反应性凝胶中的前体物质的分子水平上探测局部环境。由于异质体系的液体和固体组分之间的质量传递在合成过程中起着关键作用,因此这两种方法提供了独特的见解并且是互补的。详细介绍了水热条件NMR的最新技术进展,并说明了其在沸石和相关材料结晶中的应用。该领域的成就以与沸石,铝磷酸盐沸石型和金属有机骨架相关的一些代表性研究为例证。

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