1. Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, Hubei, P. R. China
2. University of Chinese Academy of Sciences, Beijing, P. R. China
3. Department of Chemistry and Life Science, Hubei University of Education, Wuhan, Hubei, P. R. China
4. Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei, P. R. China