1. School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
2. CAS Key Laboratory of Microscale Magnetic Resonance; Department of Modern Physics; University of Science and Technology of China; Hefei Anhui 230026 China
3. Laboratory of Protein Structure and Function; University of South China; Hengyang 421001 China
4. Hunan Provincial Key Laboratory of Chemical Power Sources; College of Chemistry and Chemical Engineering; Central South University; Changsha 410083 China