1. Department
of Chemistry, Center of Novel Functional Materials and State Key Laboratory
of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
2. State
Key Laboratory of Applied Organic Chemistry and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
3. Department
of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany