1. State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou 730000, P. R. China
2. Institute of Anatomy and Histology and Embryology, Neuroscience, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
3. Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450000, P. R. China