... Containing Trifluoromethyl Groups as Proton Exchange Membranes Zhang, Qingshuang(张清爽) Li, Qiaoling*(李巧玲) Department of Chemistry, School of Science, North University of China, Taiyuan, Shanxi 030051, China ... Chin. J. Chem. 2011, 29, 1460—1466 ...