1. Beijing National Laboratory for Molecular Sciences (BNLMS); State Key Laboratory of Rare Earth Materials Chemistry and Applications; Beijing Engineering Technology Research Centre of Active Display; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
2. Department of Physics; Yunnan University; 2 Cuihu Bei Lu Kunming 650091 P. R. China
3. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals; Kunming Institute of Precious Metals; Kunming Yunnan 650106 China