Institution: | 1. Centre for Carbon‐Rich Molecular and Nano‐Scale Metal‐Based Materials Research, Department of Chemistry and HKU‐CAS Joint Laboratory of New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong (P.R. China), Fax: (+852)?2857‐1586;2. Present address: Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong (P.R. China) |