Chinese Journal of Magnetic Resonance ›› 2020, Vol. 37 ›› Issue (1): 1-15.doi: 10.11938/cjmr20192779

• Review Articles • Previous Articles     Next Articles

Quantitative Cross Polarization Magic-Angle Spinning NMR Spectroscopy in Solids

LIANG Li-xin1,3, DENG Feng2, HOU Guang-jin1   

  1. 1. State Key Laboratory of Catalysis, National Laboratory for Clean Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. 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, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-08-29 Online:2020-03-05 Published:2019-10-16
  • Supported by:
    the National Natural Science Foundation of China (21773230); Liaoning Revitalization Talents Program (XLYC1807207); Innovation Foundation of Dalian Institute of Chemical Physics (Y7611105T5).

Abstract: The combination of cross polarization and magic-angle spinning (CP/MAS), is a routine technique for signal enhancement in solid-state nuclear magnetic resonance (NMR) spectrum. With CP/MAS, the acquisition efficiency of solid-state NMR experiments can be improved greatly. However, the enhanced signal is not quantitative according to the different CP dynamics dominated by several factors including heteronuclear dipolar couplings, spin-lattice relaxation times in the rotating frame, molecular motions, number of around abundant spins, and so on. Over the years, numerous efforts have been made to obtain quantitative CP/MAS spectroscopy. This review firstly briefly illustrated the introduction of CP and CP dynamics, and then a series of quantitative NMR methods based on CP were introduced, including ramped-amplitude CP (RAMP-CP), multiple-contact CP, quantification of CP (QCP), Lee-Goldburg frequency modulated CP (LG-FMCP) and quantitative CP (QUCP).

Key words: solid state NMR, quantitative NMR, quantitative cross polarization, relaxation time

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