Porous organic polymer containing Tröger’s base skeleton and crown ether for cycloaddition of CO2 and efficient iodine vapor adsorption

A wide range of templating reagents containing crown ether-based Tröger's base structure and coordinating of various co-catalysts were synthesized by polymerization, and characterized using various analytic techniques. Their catalytic performance for CO2 conversion and adsorption properties for iodine vapor were examined. Delightfully, after CETB-X recognized with HBr, all exhibited excellent catalytic activity in the presence of cetyltrimethylammonium bromide. The best-performing catalyst could convert CO2 into cyclic carbonate with a yield of 93.1% under optimal reaction conditions. Furthermore, CETB-C16Br/C16N+Br- possessed excellent stability and substrate suitability with six times without any significant loss of catalytic activity. A preliminary kinetic study was investigated using CETB-C16Br/C16N+Br- and the activation energy has been calculated to be 41.51 kJ/mol. All of these polymers also exhibited iodine adsorption capacities above 3.0 g/g, with the most powerful adsorption reaching 4.68 g/g. Through kinetic simulations, the adsorption process was simulated as a pseudo-first-order kinetic model.