1. Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
2. Beijing National Laboratory for Molecular SciencesKey Lab of Polymer Chemistry and Physics of Ministry of EducationCollege of ChemistryPeking University Beijing 100871 P. R. China
3. College of ChemistryUniversity of Chinese Academy of Sciences Beijing 100049 P. R. China
4. Institute of ZoologyChinese Academy of Sciences Beijing 100101 P. R. China