1. Key Laboratory of Photochemical Conversion and Optoelectronic, Materials and HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
2. Department of Chemistry; Tennessee State University; 3500 John A. Merritt Blvd. Nashville TN 37209 USA
3. College of Chemistry and Engineering; Yunnan Normal University; Kunming 650092 P. R. China
4. Center for Crystal R&D, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry; Chinese, Academy of Sciences; Beijing 100190 P. R. China