Core-shell NH2-UiO-66@iCOPs with built-in "adsorption engines" for improving CO2 adsorption and conversion

Integrating the advantages of metal-organic framework (MOFs) and ionic organic polymers (iCOPs), we fabricated a series of novel hybrid materials (core-shell M@iCOPs) by growing iCOP shell layers of varying thicknesses on the NH2-UiO-66. These M@iCOP hybrids, with NH2-UiO-66 serving as an embedded "adsorption engine," exhibit richer pore channels, which combined with the nitrogen-rich structure and pi-pi stacking interactions in the shell layer of the iCOPs, which led to a significant enhancement of CO2 adsorption with up to 3.33 mmol<middle dot>g(-1) at 0 degrees C and 1 bar. Remarkably, M@iCOPs-400, which possesses abundant ionic and Lewis acid sites, demonstrates excellent performance in CO2 conversion under milder conditions through interfacial synergistic effect, affording various cyclic carbonates in 90-99% yields. Overall, this research provides a straightforward and cost-effective approach for constructing core-shell M@iCOP materials.