We are grateful to the NNSFC (No. 21472058, 21472057, 21622201 and 21232003), the Distinguished Youth Foundation of Hubei Province (No. 2016CFA050), and CCNU (No. CCNU16JCZX02 and CCNU17TS0011) for support of this research. The support from the Program of Introducing Talents of Discipline to Universities of China (111 Program, B17019) is also appreciated. We also thank Prof. Dr. Fang-Fang Pan in CCNU for the single-crystal X-ray diffraction analysis.