Organic ionic polymers with multifunctional properties have attracted increasing attentions for their superior advantages in fields of catalysis and adsorption simultaneously.Therefore, the exploration of novel polymers is of significance.Herein, a series of ferrocene-derived imidazole ionic polymers of FcIPs with rigid structure and electronic adjustment have been synthesized through a simple solvothermal method of three-component polycondensation and Menshutkin reaction in one-pot.After characterizing the mol. structure, morphol. and stability of the ionic polymers using SEM NMR, FT-IR, BET and XPS, the applications of these materials in carbon dioxide catalytic conversion and iodine vapor adsorption were investigated.The FcIPs exhibit effective catalytic performance, with FcIP-2Br demonstrating the highest catalytic activity for epichlorohydrin under optimal catalytic conditions without co-catalyst and solvents, achieving a cyclic carbonate yield of up to 92.2 %.Addnl., FcIP-2Br displayed broad substrate applicability for various epoxides.The kinetic properties of the CO2 cycloaddition reaction catalyzed by FcIP-2Br were explored, revealing an activation energy of 67.6 kJ.mol-1.A possible reaction mechanism was postulated based on the experiments and D. Functional Theory (DFT) calculationsFurthermore, the FcIPs were candidated as adsorbents for iodine capture.The iodine adsorption experiments exhibited that FcIPs are capable of effectively adsorbing iodine vapors, revealing the highest adsorption capacity of 3.36 g.g-1 with FcIP-2Br.The adsorption kinetics of FcIPs exhibit both chem. and phys. adsorption during the reaction process, with phys. adsorption being stronger than chem. adsorption.