Abstract
Organic moieties-derived salts with permanent porosity and polarized channels have shown unique features and attractive performance in the field of adsorption, separation, and conduction. However, state-of-the-art organic salts generally rely on ionic interaction and hydrogen bonding formation to maintain the porous channels. The synthesis of organic moiety-derived salts with permanent accessible pores even after removal of the trapped guest molecules, and without the constraint of hydrogen bonding formation still remains a great challenge. Herein, we present an expeditious construction pathway to generate hierarchically nanoporous barium salts without hydrogen bonding formation. The strong ionic interaction of the barium cation and sulfonate anions led to rapid reaction equilibrium (∼2 min), affording diverse barium-derived ionic polymer (Ba-IP) with permanent porosity and highly polarized channels. The produced Ba-IP materials with abundant cations and anions displayed high CO2/N2 and CO2/CH4 separation performance, with the selectivities reaching up to 89.5 and 280, respectively, at 273 K, surpassing most of the organic polymers functionalized by ionic moieties.
