Construction on ionic organic polymers by multi-components reactions: Experimental and kinetics modeling of efficient CO2-fixation and high iodine vapor adsorption

Abstract

A series of ionic polymers (DipyBr, n = 2, 3, 4) have been synthesized under solvothermal conditions using diaminodibenzo-18-crown-6, 4-pyridinecarboxaldehyde and the corresponding bromomethyl monomer in one-pot through multi-components reactions. After comprehensive characterization of these ionic polymers by FT-IR, SEM, TGA, C CP MAS NMR, XPS, N adsorption isotherm, etc., the performance of CO fixation reaction and iodine vapor adsorption were deliberated in details. Notably, the DipyBr catalyst exhibited the best conversion yield of 97.6% for CO fixation at the controlled conditions, and the preliminary kinetic study indicated that the activation energy () for CO cycloaddition reaction catalyzed by DipyBr was determined as 70.66 kJ·mol. Furthermore, the study of iodine vapor capture showed that DipyBr has a high iodine absorption capacity (5171 mg·g).