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Herein, we report a spontaneous, catalyst\u2010free polymerization that directly converts CO\n                    <jats:sub>2<\/jats:sub>\n                    and hydroxyl\u2010functionalized ionic liquids (ILs) into multifunctional ionic polycarbonates under ambient conditions (0.1\u00a0MPa, 60\u00b0C). Mechanism studies, combining spectroscopic analysis and density functional calculations, elucidate a synergistic process wherein IL cations function as CO\n                    <jats:sub>2<\/jats:sub>\n                    concentrators, while OH\n                    <jats:sup>\u2212<\/jats:sup>\n                    anions drive the polymerization via a bicarbonate\u2010mediated nucleophilic pathway. This approach yields a well\u2010defined ionic polycarbonate that uniquely integrates high ionic conductivity (&gt;10\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>4<\/jats:sup>\n                    S\u00b7m\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    ), dual\u2010wavelength fluorescence, broad\u2010spectrum antibacterial activity (&gt;99% inhibition against\n                    <jats:italic>E. coli<\/jats:italic>\n                    and\n                    <jats:italic>S. aureus<\/jats:italic>\n                    ), and performance as a multifunctional adhesive enhancer with self\u2010monitoring capability. Furthermore, these polymers undergo complete degradation into monomeric constituents, establishing a closed\u2010loop monomer\u2010polymer\u2010monomer lifecycle. This work provides a paradigm for sustainable CO\n                    <jats:sub>2<\/jats:sub>\n                    valorization into advanced multifunctional materials, with immediate potential in smart adhesives, wearable electronics, and information encryption.\n                  <\/jats:p>","DOI":"10.1002\/anie.8811376","type":"journal-article","created":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T09:25:16Z","timestamp":1778577916000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Spontaneous, Catalyst\u2010Free Co\u2010Polymerization of Ionic Liquids With CO\n                    <sub>2<\/sub>\n                    Toward Polycarbonate"],"prefix":"10.1002","volume":"65","author":[{"given":"Yongheng","family":"Cui","sequence":"first","affiliation":[{"name":"State Key Laboratory of Advanced Fibers Materials College of Materials Science and Engineering Donghua University  Shanghai 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