capture

ionic liquid

adsorption performance

functional groups

excellent catalytic

il zif

separation performance

polymerization

Chemical Engineering Journal

Heterogeneous pyridine-based ionic hyper-cross-linked polymers with high surface area, plentiful hierarchical pores and abundant catalytic active units exhibited efficient performance in CO 2 capture and catalytic conversion. • Pyridine-based ionic hyper-cross-linked polymers are facilely prepared via a one-pot method. • Py-HCP-X (X = Cl, Br) are firstly applied to catalyze the cycloaddition of CO 2 to epoxides. • Py-HCP-X (X = Cl, Br) exhibit efficient CO 2 capture and catalytic conversion. • Py-HCP-Br catalyst display excellent catalytic recyclability and substrate universality. A kind of pyridine-based ionic hyper-cross-linked polymers (Py-HCP-X, X = Cl, Br) with high surface area, plentiful hierarchical pores and abundant catalytic active units were prepared via a one-pot method. Adsorption measurements showed that the as-prepared Py-HCP-X exhibited high CO 2 capture capacity (up to 1.72 mmol g −1 , 273 K and 1 bar). Importantly, Py-HCP-Br displayed excellent catalytic activity for the cycloaddition of CO 2 to epoxides under metal/cocatalyst/solvent-free conditions. And the propylene carbonate was produced in 97% yield with an excellent selectivity of 99% at 120 °C and 2.0 MPa CO 2 for 8 h. The high performance of the present catalyst is ascribable to synergistic contributions of plentiful hierarchical pores and abundant nucleophilic bromide ions and pyridine-based active units in the Py-HCP-Br catalyst. Additionally, the catalyst is able to be simply separated by centrifugation and reused for four runs without significant loss in the performance, furthermore, the catalyst exhibits great structural stability and substrate universality.

One-pot synthesis of pyridine-based ionic hyper-cross-linked polymers with hierarchical pores for efficient CO2 capture and catalytic conversion