1. College of Information Technology; Jilin Normal University; Siping 136000 People's Republic of China
2. State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun 130022 China
3. College of Physics; Jilin Normal University; Siping 136000 People's Republic of China
4. Institute of Theoretical Chemistry; Jilin University; Changchun 130023 People's Republic of China