1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
2. University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. DSM DMSC R&D Solutions P.O. Box 18 6160 MD Geleen The Netherlands
4. State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical Technology Beijing 100029 P. R. China