1. Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100910 P. R. China
2. College of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
3. Key Laboratory of Colloid and Interface Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100910 P. R. China
4. Institute of Chemistry; Academia Sinica; Taipei 11529 Taiwan
5. Departments of Chemistry & Biochemistry and Materials; Center for Polymers and Organic Solids; University of California; Santa Barbara CA 93106-9510 USA