1. Key Laboratory of Magnetic Molecules and Magnetic Information Materials of the Ministry of Education, School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031, People’s Republic of China
2. Weinan Bureau of Natural Resources and Planning, Weinan, Shaanxi 714000, China
3. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi’an 710127, China