A flexible porous copper-based metal-organic cage for carbon dioxide adsorption

A porous metal-organic cage (FJI-C9) based on Cu2(CO2)4 paddle-wheel building blocks and flexible ligand 1,3,5-trimethyl-2,4,6-tris(3-phenoxymethyl)benzoic acid (TTBA) has been constructed. The porous FJI-C9 with large cage of 1.5 nm exhibits high CO2 adsorption uptake at room temperature.147