1. Wuhan National High Magnetic Field Center & School of Physic Huazhong University of Science and Technology Wuhan 430074 P. R. China
2. School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 P. R. China
3. College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 P. R. China
4. School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China
5. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences Guangxi Normal University Guilin 541004 P. R. China