Microporous coordination polymer with secondary amine functional groups for CO2 uptake and selectivity

The CO2 capturing and sequestration are of importance in environmental science. A new type of microporous coordination polymer (Ni/PAPy) with secondary amine groups has been successfully prepared. Taking advantage of the synergistic effect of metal-electrostatic and hydrogen bonding interactions between the Ni/PAPy network and CO2 molecules, the CO2 uptake capacity of the microporous coordination polymer reaches up to 4.82 mmol g(-1) (1.0 bar, 273 K) with the high selectivities (CO2/N-2 = 83, CO2/CH4 = 16), making the Ni/PAPy a promising microporous material for application of CO2 uptake and separation. For comparison, the microporous coordination polymer without secondary amine groups (Ni/PPy) is also prepared.