A porous cobalt-based MOF with high CO2 selectivity and uptake capacity

Abstract

A porous cobalt-based metal–organic framework [CoL²⁻]_n (L = 5-(pyrimidin-5-yl) isophthalic acid) (termed NJFU-2), has been designed by self-assembling [Co₂(COO)₄] paddlewheel SBUs and a novel trigonal hetero-functional ligand. Moreover, the activated sample NJFU-2a exhibits a moderate BET surface area of 1223 m² g⁻¹, large CO₂ uptake (6.14 wt% at 0.15 bar and 298 K) and high selectivity for CO₂ over CH₄ and N₂ at room temperature, estimated by the Ideal Adsorbed Solution Theory (IAST).