Alkylamine‐Tethered Stable Metal–Organic Framework for CO2 Capture from Flue Gas

Abstract Different alkylamine molecules were post‐synthetically tethered to the unsaturated Cr III centers in the metal–organic framework MIL‐101. The resultant metal–organic frameworks show almost no N 2 adsorption with significantly enhanced CO 2 capture under ambient conditions as a result of the interaction between amine groups and CO 2 molecules. Given the extraordinary stability, high CO 2 uptake, ultrahigh CO 2 /N 2 selectivity, and mild regeneration energy, MIL‐101‐diethylenetriamine holds exceptional promise for post‐combustion CO 2 capture and CO 2 /N 2 separation.