Synthesis of copolymerized porous organic frameworks with high gas storage capabilities at both high and low pressures

A series of copolymerized porous organic frameworks (C-POFs) were synthesized with monomers of tetrakis(4-bromophenyl)methane and tris(4-bromophenyl)amine in different ratios by a Yamamoto-type Ullmann cross-coupling reaction. These C-POFs exhibit high physicochemical stability, large surface areas and excellent H-2, CH4 and CO2 adsorption properties both at low and high pressures.