1. Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P. R. China, http://chem.hkbu.edu.hk/rwywong
2. HKBU Institute of Research and Continuing Education, Shenzhen Virtual University Park, Shenzhen, 518057, P. R. China
3. Department of Applied Chemistry, Waseda University, Tokyo 169‐8555, Japan, http://www.appchem.waseda.ac.jp/~polymer/
4. Institute of Advanced Materials, Fuzhou University, Fuzhou, Fujian 350002, P. R. China