TfOH-mediated electrophilic aromatic aroylation polycondensation of 2,2′-bis[4-(trifluoromethylated aroyl)phenoxy]biphenyls with arenedicarbonyl dichlorides

Abstract

CF 3-bearing wholly aromatic polyketones were prepared via trifluoromethanesulfonic acid (TfOH)-mediated electrophilic aromatic aroylation polycondensation of CF 3-bearing 2,2′-diaryloxybiphenyls with arenedicarbonyl dichlorides. 2,2′-bis[4-(4-trifluoromethylbenzoyl)phenoxy]biphenyl has good polymerizability and high adaptability against several arenedicarbonyl dichlorides. Against acyl-acceptant monomer having relatively small content of CF 3 group, AlCl 3 is also efficient acidic mediator in the condensation polymerization. The characteristic dependence of polymerizability and polymer property upon the number and position of CF 3 groups, the length of the side chains, and the kind of the arenedicarbonyl residues are also discussed.