Chinese Journal of Magnetic Resonance ›› 2017, Vol. 34 ›› Issue (2): 231-244.doi: 10.11938/cjmr20170213

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A Review on Microwave-Induced Optical Nuclear Polarization

ZHANG Zhen1,2, HE Yu-gui1, HUANG Chong-yang1, LIU Chao-yang1, FENG Ji-wen1   

  1. 1. 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;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-04-13 Revised:2017-04-15 Online:2017-06-05 Published:2017-06-05

Abstract: Microwave-induced optical nuclear polarization (MIONP) can enhance nuclear spin polarization by several orders of magnitude. In MIONP, non-equilibrium electronic polarization was first enhanced through photo-excited triplet states, which is then transferred to nuclei by microwave irradiation. The potential applications of MIONP include probing structure and dynamics of proteins, studies of photochemical and photophysical processes, quantum computing and low-field NMR/MRI. In this review, we introduce the principles of MIONP and its application in nuclear polarization enhancement. The experimental setups, recent progresses, novel applications and future possibilities of MIONP are discussed.

Key words: intersystem crossing, triplet states, integrated solid effect, microwave induced optical nuclear polarization (MIONP)

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