1. Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Ling-Ling Road Shanghai 200032 China
2. Syngenta Jealott's Hill International Research Centre Bracknell, Berkshire RG42 6EY UK
3. Key Laboratory of Energy Regulation Materials Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Ling-Ling Road Shanghai 200032 China