1. College of Chemistry & Chemical Engineering, Xinjiang Normal University, Urumqi 830054, P. R. China
2. School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, P. R. China
3. Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Technical Institute of Physics & Chemistry of CAS, No. 40-1, Beijing South Road, Urumqi 830011, P. R. China