1. Hydrogen bond donor functionalized poly(ionic liquids)@MIL-101 for the CO2 capture and improving the catalytic CO2 conversion with epoxide.
- Author
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Jiang, Yichen, Li, Dazhi, Zhao, Yifei, and Sun, Jianmin
- Subjects
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CARBON sequestration , *HYDROGEN bonding , *RING formation (Chemistry) , *CARBON dioxide , *CARBOXYL group , *IONIC liquids - Abstract
[Display omitted] • Hydrogen bond donor (HBD) functionalized poly(ionic liquids) were incorporated into MIL-101 framework through the encapsulation of monomers then copolymerization methods. • HBD functionalized PIL@MIL-101 exhibited excellent affinity to CO 2 , benefitted from the high BET surface area and porous structure of MIL-101 together with the incorporated poly(ionic liquid). • Due to the synergistic effects of multiple functional groups of Lewis acidic Cr sites, HBD groups and nucleophilic Br-, the HBD functionalized PIL@MIL-101 showed efficient catalytic performance for the CO 2 -epichlorohydrin cycloaddition under cocatalyst-free, solventless and mild (70 °C, 1.0 MPa, 2.5 h) reaction conditions. • HBD functionalized PIL@MIL-101 composite showed facile synthesis, easy separation, thermal and recycling stabilities for material candidate in CO 2 capture and conversion. Hydrogen bond donor functionalized poly(ionic liquids) were incorporated into MIL-101 framework for synthesis of composites PIL-R@MIL-101 (R = COOH, OH, NH 2). The effect of different hydrogen bond donors on CO 2 -epoxide cycloaddition reaction was discussed through XPS, NH 3 -TPD characterizations. Thereinto, PIL-COOH@MIL-101 showed efficient catalytic performance in the cycloaddition reaction of CO 2 and epichlorohydrin, 92.7% substrate conversion was obtained under 70 °C, 1.0 MPa, cocatalyst- and solvent-free conditions for 2.5 h. The improved activity was benefited from the synergistic effects of Lewis acidic Cr centers, carboxyl group, and nucleophilic Br-, together with the high surface area (1178 m2/g), and good CO 2 affinity. In addition, PIL-COOH@MIL-101 also showed facile recovery method by easy centrifugation and good recycling stability. Considering the good CO 2 affinity, excellent catalytic performance in CO 2 cycloaddition reaction, better thermal and recycling stabilities, the facilely prepared functionalized poly(ionic liquid)@MIL-101 composite would exhibit promising application prospect in CO 2 capture and conversion. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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