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Synthesis of anion-functionalized mesoporous poly(ionic liquid)s via a microphase separation-hypercrosslinking strategy: highly efficient adsorbents for bioactive molecules

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Abstract

The synthesis of porous materials with a well-defined pore structure and functionality is centrally important for the development of advanced adsorbents and sensors. In this study, we explore a direct and facile methodology combining microphase separation and hypercrosslinking, and prepare anion-functionalized mesoporous poly(ionic liquid)s (MPILs) with well-developed mesopores. This methodology involved a copolymerization of IL monomers and crosslinkers to create mesopores via microphase separation. Additionally, the MPILs were texturally engineered by hypercrosslinking to stabilize/rebuild labile collapsed mesoporous networks and generate microporosity. Thus, a new family of anion-functionalized MPILs containing amphiphilic long-chain carboxylate ionic liquids (LCC-ILs) were synthesized. These anion-functionalized MPILs exhibited extraordinarily high adsorption capacity (211.45 mg g−1 for tocopherols) and excellent selectivity (Sδ/α, 8.65; Sβ&γ/α, 4.20) for bioactive tocopherol homologues and organic phenolic compounds with high structural similarity, significantly better than those of commercial adsorbents or common MPILs. Additionally, anion-functionalized MPILs demonstrated enhanced carbon dioxide (CO2) capture performances (28.18 mg g−1 at 0 °C and 1 bar). This study demonstrates the great potential of anion-functionalized MPILs as advanced adsorbents, and facilitates a textural engineering approach to the development of novel porous ionic materials for other applications.

Graphical abstract: Synthesis of anion-functionalized mesoporous poly(ionic liquid)s via a microphase separation-hypercrosslinking strategy: highly efficient adsorbents for bioactive molecules

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Publication details

The article was received on 04 Mar 2017, accepted on 13 Jun 2017 and first published on 14 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA01986F
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Synthesis of anion-functionalized mesoporous poly(ionic liquid)s via a microphase separation-hypercrosslinking strategy: highly efficient adsorbents for bioactive molecules

    X. Suo, L. Xia, Q. Yang, Z. Zhang, Z. Bao, Q. Ren, Y. Yang and H. Xing, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA01986F

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