1. Department of Chemistry; Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials; Wuhan University; Wuhan 430072 China
2. China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics; Wuhan Institute of Physics and Mathematics; The Chinese Academy of Sciences; Wuhan 430071 China
3. Key Laboratory of Organic Solids; Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China