1. CAS Key Laboratory of Magnetic Resonance in Biological Systems; State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics; National Center for Magnetic Resonance in Wuhan; Collaborative Innovation Center of Chemistry for Life Sciences; Wuhan Institute of Physics and Mathematics of the Chinese Academy of Sciences; Wuhan Hubei Province 430071 China
2. Department of Physics and Astronomy and Department of Chemistry; State University of New York at Stony Brook; Stony Brook New York 11794 USA