1. Department of Chemistry, Changchun Normal University, Changchun 130032, China
2. Xiamen Institute of Rare-Earth Materials, Chinese Academy of Sciences, Xiamen 361005, China
3. State Key Laboratory of Structural Chemistry, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, and Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350108, China