1. Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
2. School of Chemistry and Chemical Engineering Shanxi University Taiyuan 030006 P. R. China
3. Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum Studies Beijing Normal University Beijing 100875 P. R. China
4. School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 P. R. China