1. State Key
Laboratory of Magnetic
Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic
Resonance, Key Laboratory of Magnetic Resonance in Biological Systems,
Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
2. Graduate School, the Chinese Academy of Sciences, Beijing 100029, China
3. Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States