Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (2): 270-282.doi: 10.3866/PKU.WHXB201611022

• ARTICLE • Previous Articles     Next Articles

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

Shen-Hui LI,Jing LI,An-Min ZHENG,Feng DENG*()   

  • Received:2016-09-23 Published:2017-01-12
  • Contact: Feng DENG E-mail:dengf@wipm.ac.cn
  • About author:LI Shen-Hui,obtained his Ph.D.in 2008 from Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences.He was appointed as a postdoctoral research fellow at Iowa State University during 2008-2010 and joined WIPM as an associate research fellow since 2010.His current research interests are the development of solid-state NMR methodology for heterogeneous catalysts and materials sciences|LI Jing,received her B.S.degree from Liaocheng University in 2014.She is currently a joint graduate student under the supervision of Prof.YU Ning-Ya at Hunan Normal University and Dr.LI Shen-Hui at Wuhan Institute of Physics and Mathematics (WIPM),CAS.Her research focuses on solid state NMR studies of host-guest interaction in MOFs|ZHENG An-Min,obtained his Ph.D.(2005) from Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences under the supervision of Prof.DENG Feng and has been affiliated with the same institute afterwards.Then he joined Prof.DENG Feng's group.In 2007,he was a visiting research fellow in Prof.LIU Shang-Bin's lab at Institute of Atomic and Molecular Sciences,Academia Sinica,Taiwan.In 2012,he was promoted to a professor.His past and current research interest has been focusing on studies of structure and reaction mechanism of the solid acid catalysts by using experimental solid-state NMR and theoretical quantum chemical calculations|DENG Feng,obtained his Ph.D.(1996) from WIPM,CAS.After his postdoctoral research (1997-1998) at the Department of Chemistry,Texas A&M University (with Prof.James F.Haw),he has worked at WIPM,CAS as a professor (1999-present).His research interests include solid-state NMR methodology and its application to heterogeneous catalysis,Email:dengf@wipm.ac.cn;Tel:+86-27-87198820
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(21210005, 21221064, 21373265)

Abstract:

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.

Key words: Solid-state NMR, Acidity characterization, Solid acid catalyst, Reaction mechanism, Host-guest interaction

MSC2000: 

  • O643