1. Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
2. School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Material Science & Engineering Beijing Institute of Technology Beijing 100081 P. R. China
4. DSM DMSC R&D Solutions P.O. Box 18 6160 MD Geleen The Netherlands
5. Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science Tianjin University Tianjin 300072 P. R. China