1. Key Laboratory of Magnetic Molecules and Magnetic Information Material, Ministry of Education, College of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030000, PR China
2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
3. College of Physics, Jilin University, Changchun 130012, PR China