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Functional Poly(Ionic Liquid)s: Catalytic Conversion of CO 2.

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Title: Functional Poly(Ionic Liquid)s: Catalytic Conversion of CO 2.
Authors: Atlaskina, Maria1 (AUTHOR), Smorodin, Kirill1,2 (AUTHOR), Kryuchkov, Sergey1 (AUTHOR), Atlaskin, Artem1,2 (AUTHOR), Sysoev, Alexander1 (AUTHOR), Kazarina, Olga2 (AUTHOR), Petukhov, Anton2 (AUTHOR), Vorotyntsev, Andrey2 (AUTHOR), Vorotyntsev, Ilya1 (AUTHOR)
Source: Polymers (20734360). Mar2026, Vol. 18 Issue 5, p549. 15p.
Subjects: Polymerized ionic liquids, Carbon dioxide, Block copolymers, Chemical reactions, Nanostructures, Membrane reactors
Abstract: This study reports the synthesis and catalytic evaluation of a series of imidazolium-based polymeric ionic liquids (PILs) for the cycloaddition of CO2 to epichlorohydrin (ECH). The synthesized catalysts include homopolymers, poly(3-hydroxyethyl-1-vinylimidazole chloride) (p[HVIm][Cl]) and poly(3-carboxymethyl-1-vinylimidazole chloride) (p[CMVIm][Cl]), and their block copolymers with polystyrene, synthesized for the first time, pS-b-p[HVIm][Cl] and pS-b-p[CMVIm][Cl]. Structural characterization by NMR, IR spectroscopy, and gel permeation chromatography confirmed the successful synthesis. The block copolymers exhibited a low polydispersity index (PDI 1.1–1.2), which is indicative of homogeneous chain lengths and the propensity to form ordered nanostructures, whereas the homopolymers showed higher PDI (2.4–2.9). Catalytic testing at 90 °C and 1 MPa CO2 for 4 h revealed a clear activity trend: p[CMVIm][Cl] < p[HVIm][Cl] < pS-b-p[CMVIm][Cl] < pS-b-p[HVIm][Cl], with conversions exceeding 75% for all catalysts and a maximum of 82.69% for pS-b-p[HVIm][Cl]. These results demonstrate that the catalytic performance of PILs is governed by a synergistic interplay between the local chemical functionality of the ionic moiety and the overall polymer architecture. Based on these results, the synthesized polymeric ionic liquids, particularly pS-b-p[HVIm][Cl], demonstrate strong potential for creating multifunctional materials. Their ability to self-assemble into ordered nanostructures with distinct hydrophobic and hydrophilic domains provides a foundational architecture for combined gas separation and catalysis. The observed "micellar catalytic effect", which enhances local reagent concentration near active sites, could be leveraged in a membrane reactor to simultaneously capture and convert CO2 directly within the membrane. This integrated "separation–reaction" approach represents a promising strategy for advancing circular carbon economy technologies. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Functional Poly(Ionic Liquid)s: Catalytic Conversion of CO 2.
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  Data: This study reports the synthesis and catalytic evaluation of a series of imidazolium-based polymeric ionic liquids (PILs) for the cycloaddition of CO2 to epichlorohydrin (ECH). The synthesized catalysts include homopolymers, poly(3-hydroxyethyl-1-vinylimidazole chloride) (p[HVIm][Cl]) and poly(3-carboxymethyl-1-vinylimidazole chloride) (p[CMVIm][Cl]), and their block copolymers with polystyrene, synthesized for the first time, pS-b-p[HVIm][Cl] and pS-b-p[CMVIm][Cl]. Structural characterization by NMR, IR spectroscopy, and gel permeation chromatography confirmed the successful synthesis. The block copolymers exhibited a low polydispersity index (PDI 1.1–1.2), which is indicative of homogeneous chain lengths and the propensity to form ordered nanostructures, whereas the homopolymers showed higher PDI (2.4–2.9). Catalytic testing at 90 &#176;C and 1 MPa CO2 for 4 h revealed a clear activity trend: p[CMVIm][Cl] &lt; p[HVIm][Cl] &lt; pS-b-p[CMVIm][Cl] &lt; pS-b-p[HVIm][Cl], with conversions exceeding 75% for all catalysts and a maximum of 82.69% for pS-b-p[HVIm][Cl]. These results demonstrate that the catalytic performance of PILs is governed by a synergistic interplay between the local chemical functionality of the ionic moiety and the overall polymer architecture. Based on these results, the synthesized polymeric ionic liquids, particularly pS-b-p[HVIm][Cl], demonstrate strong potential for creating multifunctional materials. Their ability to self-assemble into ordered nanostructures with distinct hydrophobic and hydrophilic domains provides a foundational architecture for combined gas separation and catalysis. The observed &quot;micellar catalytic effect&quot;, which enhances local reagent concentration near active sites, could be leveraged in a membrane reactor to simultaneously capture and convert CO2 directly within the membrane. This integrated &quot;separation–reaction&quot; approach represents a promising strategy for advancing circular carbon economy technologies. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.3390/polym18050549
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 15
        StartPage: 549
    Subjects:
      – SubjectFull: Polymerized ionic liquids
        Type: general
      – SubjectFull: Carbon dioxide
        Type: general
      – SubjectFull: Block copolymers
        Type: general
      – SubjectFull: Chemical reactions
        Type: general
      – SubjectFull: Nanostructures
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      – SubjectFull: Membrane reactors
        Type: general
    Titles:
      – TitleFull: Functional Poly(Ionic Liquid)s: Catalytic Conversion of CO 2.
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              Text: Mar2026
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              Y: 2026
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