1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P.R. China
2. Yoening Tianci Mining Changsha Technology Center, Changsha 410083, P.R. China
3. College of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, P.R. China
4. School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand