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-HO hydrogen bonding interactions.