The　catalytic　conversion　of　carbon　dioxide　(CO2)　into　valuable　chemicals　offers　a　promising　solution　to　mitigate　global　warming.　However,　the　high　thermodynamic　and　kinetic　stability　makes　CO2　activation　challenging,　typically　requiring　harsh　conditions.　This　study　presents　an　ionic　polymer,　(HO)(3)-ImbTbIP,　synthesized　via　the　quaternarization　of　1,2,4,5-tetrakis(bromomethyl)benzene　(Tb)　with　1,3,5-tri(1H-imidazol-1-yl)benzene　(Imb)　and　2-(hydroxymethyl)-2-(1H-imidazol-1-yl)propane-1,3-diol　(HO)(3).　The　polymer　features　imidazolium　ionic　liquids　and　triple　hydrogen　bonds,　where　(HO)(3)　moieties　weaken　the　C　&　horbar;O　bond　of　epoxides,　and　bromide　anions　act　as　nucleophiles　to　facilitate　epoxide　ring-opening.　Simultaneously,　CO2　activated　by　imidazolium　reacts　with　oxyanion　intermediates　to　form　alkyl　carbonate　species.　Remarkably,　(HO)(3)-ImbTbIP　efficiently　converts　CO2　to　cyclic　carbonates　under　mild　conditions　(120　degrees　C,　1　bar　CO2).　This　work　advances　the　understanding　of　CO2　conversion　and　highlights　the　potential　of　task-specific　polymers　for　sustainable　catalysis.