1. University of Hong Kong; Department of Chemistry; Pokfulam Road Hong Kong P.R. China
2. City University of Hong Kong; Department of Biology and Chemistry; Tat Chee Avenu, Kowloon Hong Kong P.R. China
3. University of Hong Kong; Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee) and Department of Chemistry; Hong Kong P.R. China