Metal–organic framework with pore contraction and modification by diethylammonium cations for record SO2/CO2 separation

Abstract

A robust MOF with diethylammonium cations in its pores, enhances pore partitioning and modifies the environment, enabling selective and dense SO₂ packing through hydrogen bonds. It achieves a reversible SO₂ uptake with a high adsorption enthalpy and record IAST selectivity of 1182 for SO₂/CO₂ at 298 K and 1 bar.