Pyrazine-Based Covalent Organic Frameworks for Effective Iodine and Carbon Dioxide Capture AITranslate

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DOI：https://doi.org/10.1021/acsapm.3c01950

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Covalent organic frameworks (COFs) possess good porosity, uniform channels, and tunable skeletons, as well as excellent stability, which are well-suited for gas adsorption. In this study, we developed two pyrazine-based COFs, namely, TFPPz–MPA–COF and TFPPz–BD(OMe)2–COF, by condensation reaction of C4 and C2 axisymmetric monomers. Both COFs exhibited good crystallinity, well-defined pore structures, and outstanding thermal and chemical stability. TFPPz–MPA–COF and TFPPz–BD(OMe)2–COF demonstrated high iodine adsorption capabilities of up to 5.41 and 5.18 g g–1 in iodine vapor, and 95.42 and 98.04 mg g–1 in n-hexane, respectively. In addition, TFPPz–MPA–COF and TFPPz–BD(OMe)2–COF exhibited good CO2 uptake capacities of 1.48 and 1.34 mmol g–1 at 273 K, respectively.