New monomers, 4,4 0 -bis(4-phenoxybenzoyl)diphenyl (BPOBDP) and N,N 0 -bis(4-phenoxybenzoyl)-pphenylenediamine (BPBPPD), were conveniently synthesized via simple synthetic procedures from readily available materials. A series of novel poly(aryl ether ketone)s containing both diphenyl moiety and amide linkages in the main chains were prepared by electrophilic Friedel-Crafts solution copolycondensation of isophthaloyl chloride (IPC) with a mixture of BPOBDP and BPBPPD, over a wide range of BPOBDP/BPBPPD molar ratios, in the presence of anhydrous AlCl 3 and N-methylpyrrolidone (NMP) in 1,2dichloroethane (DCE). All the polymers are semicrystalline and had remarkably increased T g s over commercially available PEEK and PEKK due to the incorporation of the diphenyl moiety and amide linkages in the main chains. The polymers with 40-60 mol% BPBPPD had not only high T g s of 183-189 C, but also moderate T m s of 314-328 C, which are very suitable for the melt processing. These polymers had tensile strengths of 107.4-111.5 MPa, Young's moduli of 2.20-2.45 GPa, and elongations at break of 11.3-13.5% and exhibited high thermal stability and good resistance to organic solvents.