1. Organic Solid Laboratory, CAS Research/Education Center for Excellence in Molecular Sciences, CMS & BNLMS, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P.R. China
2. Institute of Condensed Matter and Material Physics, School of Physics; Peking University; Beijing 100871 P.R. China
3. BNLMS, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering; Peking University, Beijing, 100871 (P.R. China)
4. Beijing Synchrotron Radiation Facility, Institute of High-Energy Physics; Chinese Academy of Sciences; Beijing 100047 P.R. China
5. CMS & BNLMS, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P.R. China
6. CAS Key Laboratory of Standardization and Measurement for Nanotechnology; National Center for Nanoscience and Technology; Beijing 100190 P.R. China