1. The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P.R. China
2. Department of Physics, Shanghai Normal University, Shanghai 200234, P.R. China
3. Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
4. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, P.R. China