1. Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
2. Department of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. Center for High Pressure Science and Technology Advanced Research Beijing 100049 P. R. China
4. Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of Physics Zhejiang Sci-Tech University Hangzhou 310018 P. R. China