A series of poly (phenylene ether) s with sulfonic acid groups via long alkyl side chains, SPPEs, were successfully prepared as proton exchange membranes for fuel cells. The new monomer, bis [4-fluoro-3-(p-methoxylbenzoyl)] biphenyl (BFMBP), containing two pendent methoxyphenyl groups was synthesized by the Friedel–Crafts reaction of 5-chloro-2- fluorobenzoyl chloride with anisole, followed by the nickel-mediated homocoupling ...
