1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU‐HKU Joint Laboratory on Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2. Department of Chemistry, Iowa State University, USA
3. Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
4. Chengdu Center for Analysis and Measurement, Academia Sinica, Chengdu 610041, China