1. Department of Chemistry, Renmin University of China, Beijing, China
2. Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
3. College of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian, China
4. College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, China
5. University of International Relations, Beijing, China
6. Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA