1. Key Laboratory of Green Chemistry & Technology of Ministry of, Education College of Chemistry Sichuan University Chengdu 610064 P. R. China
2. College of Chemistry and Chemical Engineering Neijiang Normal University Neijiang 641100 P. R. China
3. Faculty of Material and Chemical Engineering Yibin University Yibin, Sichuan 644007 P. R. China
4. Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China