固体酸催化剂结构与催化反应机理的核磁共振研究（英文）

发布时间：2018-02-07 14:50

本文关键词： 固体核磁共振酸表征固体酸催化剂催化反应机理主客体相互作用　出处：《物理化学学报》2017年02期 　论文类型：期刊论文

【摘要】：固体酸催化剂因具有环境友好、高产物选择性和易于分离等优点而广泛应用于现代石油化工领域的各种催化过程。固体核磁共振是一种研究功能材料结构和动力学性质的有力工具。本文将主要介绍固体核磁共振在表征固体酸催化剂的表面酸性以及多相催化反应机理方面的应用。具体来说,可以通过一系列探针分子(如吡啶、丙酮、三烷基氧磷和三甲基磷)的NMR化学位移实验观测值来定量测量酸强度;二维双量子魔角旋转(DQ MAS)固体核磁共振技术能够揭示催化剂上酸中心的空间临近性及协同效应。另外,原位固体核磁共振可以揭示多相催化反应过程中反应物、中间体、反应产物的演化,阐明催化反应机理。
[Abstract]:Solid acid catalysts are environmentally friendly, The advantages of high product selectivity and easy separation are widely used in various catalytic processes in the field of modern petrochemical industry. Solid nuclear magnetic resonance (SNMR) is a powerful tool for studying the structure and kinetic properties of functional materials. The application of solid nuclear magnetic resonance in characterizing the surface acidity of solid acid catalyst and the mechanism of heterogeneous catalytic reaction is introduced. Acid intensity can be quantitatively measured by NMR chemical shift observations of a series of probe molecules (such as pyridine, acetone, trialkyl phosphorus and trimethyl phosphorus). Two-dimensional double quantum magic angle rotation (DQ MAS) solid-state nuclear magnetic resonance (SNMR) technique can reveal the spatial proximity and synergistic effect of acid sites on the catalyst. In addition, in situ solid-state NMR can reveal reactants and intermediates in the process of heterogeneous catalytic reactions. The evolution of the reaction product and the mechanism of the catalytic reaction were clarified.
【作者单位】：中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室武汉磁共振中心;
【基金】：supported by the National Natural Science Foundation of China(21210005,21221064,21373265)~~
【分类号】：O643.36

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