Citation: LI Shen-Hui, LI Jing, ZHENG An-Min, DENG Feng. Solid-State NMR Characterization of the Structure and Catalytic Reaction Mechanism of Solid Acid Catalysts[J]. Acta Physico-Chimica Sinica, ;2017, 33(2): 270-282. doi: 10.3866/PKU.WHXB201611022 shu

Solid-State NMR Characterization of the Structure and Catalytic Reaction Mechanism of Solid Acid Catalysts

State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, P. R. China

Received Date: 23 September 2016
Revised Date: 2 November 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21210005, 21221064, 21373265).

Solid acid catalysts have been widely used in advanced petrochemical processes because of their environmental friendliness, high product selectivity, and easy product separation. Solid-state nuclear magnetic resonance (NMR) spectroscopy is a well-established tool for structure determination and dynamic study of various functional materials. In this review, we focus mainly on our research using solid-state NMR to characterize the acid properties and elucidate the catalytic reaction mechanism of solid acid catalysts. The acid strength of solid acids can be quantitatively measured from the chemical shifts of adsorbed probe molecules such as pyridine, acetone, trialkylphosphine oxides, and trimethylphosphine. The spatial proximity and synergetic effect of various acid sites on solid acid catalysts can be ascertained by two-dimensional (2D) double-quantum magic angle spinning (DQ MAS) NMR spectroscopy. Additionally, in situ solid-state NMR spectroscopy can be used to explore heterogeneous catalytic reaction mechanisms by monitoring the evolution of the reactants, intermediates, and products.
- Solid-state NMR,
- Acidity characterization,
- Solid acid catalyst,
- Reaction mechanism,
- Host-guest interaction
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