1. School of Chemistry and Chemical Engineering
2. Chongqing University
3. Chongqing 401331
4. China
5. Key Laboratory of Magnetic Resonance in Biological Systems
6. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
7. National Center for Magnetic Resonance in Wuhan
8. Wuhan Institute of Physics and Mathematics
9. Chinese Academy of Sciences
10. Lehrstuhl für Theoretische Chemie
11. Ruhr-Universität Bochum
12. Bochum 44780
13. Germany