Water Stable Metal–Organic Framework Evolutionally Formed from a Flexible Multidentate Ligand with Acylamide Groups for Selective CO₂ Adsorption

A water stable porous metal–organic framework has been synthesized through an evolution approach in terms of both structures and properties. This interesting pillar-layered MOF ({[Cu2(TCMBT)(bpp)(μ3-OH)]·6H2O}n (1)) constructed from a flexible ligand possesses a BET surface area of 808.5 m2 g–1 and exhibits good selectivities of CO2/N2 (20.1:1) and CO2/CH4(4.0:1), which are comparable to those of the ZIF materials reported by Yaghi’s group. The excellent water stability of complex 1 would be quite preferable in practical application.