1. State Key Laboratory of Supramolecular Structure and Materials; Jilin University; Changchun 130012 P. R. China
2. College of Chemistry; Jilin University; Changchun 130012 P. R. China
3. Institute of Theoretical Chemistry; Jilin University; Changchun 130012 P. R. China
4. State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 P. R. China