Highly efficient CO2 capture by carbonyl-containing ionic liquids through Lewis acid–base and cooperative C–H⋯O hydrogen bonding interaction strengthened by the anion

Abstract

A strategy to improve CO₂ capture significantly through the non-covalent interaction strengthened by the anion was reported, which exhibits an extremely high capacity up to 1.24 mole CO₂ per mole ionic liquid and excellent reversibility due to the presence of the enhanced Lewis acid–base and cooperative C–H⋯O hydrogen bonding interactions.