1. Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China
2. Beijing Huiwen Middle School, Beijing 100061, People's Republic of China
3. School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom