1. School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
2. Shandong Vocational College of Light Industry Zhoucun Mishan Road Zibo 255300 P. R. China
3. Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China