1. Department of Physics, School of Sciences, Beihua University, Jilin 132013, China
2. Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, United States
3. Department of Aeronautical Engineering Professional Technology, Jilin Institute of Chemical Technology, Jilin 132102, China
4. School of Sciences, Changchun University, Changchun 130022, China