Nonstoichiometric polycondensation based on Friedel–Crafts acylation in superacids for the syntheses of aromatic polyketones

Based on Friedel–Crafts acylation, nonstoichiometric polycondensation was achieved using 4,4′-dicarboxydiphenyl ether and 2,2′-dimethoxybiphenyl in trifluoromethanesulfonic acid.