1. Chongqing Key Laboratory of Inorganic Functional Materials, College of Chemistry, Chongqing Normal University, Chongqing, P.R. China;
2. State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Pharmacy of Guangxi Normal University, Guilin, P.R. China;
3. Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal