Cuiying Pei, Teng Ben, Yanqiang Li and Shilun Qiu
            Chem. Commun., 2014,50, 6134-6136
            
            
            DOI:
            10.1039/C4CC00302K,
            Communication
        
        
    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 H2, CH4 and CO2 adsorption properties both at low and high pressures.