1. School
of Chemistry and Environment, Beihang University, Beijing 100191, China
2. Beijing
National Laboratory for Molecular Sciences (BNLMS), Key Laboratory
of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
3. Department of Chemistry, State Key Laboratory of Molecular Neuroscience, Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China