1. Key Laboratory of Magnetic Molecules & Magnetic Information Materials (Ministry of Education), Institute of Chemistry and Culture, School of Chemistry & Material Science, Shanxi Normal University, Linfen 041004, People’s Republic of China
2. Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710054, People’s Republic of China
3. Institute of Crystalline Materials, Shanxi University, Taiyuan 030006, People’s Republic of China