Room-Temperature\nSynthesis of a Fluorine-Functionalized\nNanoporous Organic Polymer for Highly Efficient SF<sub>6</sub> Adsorption\nand Separation

Sulfur hexafluoride (SF<sub>6</sub>) is widely used in\nthe power\nindustry and significantly contributes to the greenhouse effect, necessitating\nthe development of efficient materials for SF<sub>6</sub> capture,\nparticularly fluorine-containing materials. However, existing fluorine-containing\nmaterials often require complex monomers and high synthesis temperatures.\nHerein, we report the synthesis of a fluorine-functionalized carbazole-based\nnanoporous organic polymer (CNOP-7) at room temperature, using commercially\navailable 4,4′-bis(9<i>H</i>-carbazole-9-yl)-1,1′-biphenyl\nand 1,1,1-trifluoroacetone. CNOP-7 contains 14.7% fluorine atoms and\nexhibits a high specific surface area of 1270 m<sup>2</sup>·g<sup>–1</sup>, demonstrating excellent SF<sub>6</sub> adsorption\nand separation performance. The SF<sub>6</sub>/N<sub>2</sub> selectivity\nof CNOP-7 reaches 107 at 273 K and 73 at 298 K. Furthermore, dynamic\nbreakthrough experiments confirm that CNOP-7 can efficiently and repeatedly\nseparate SF<sub>6</sub> from SF<sub>6</sub>/N<sub>2</sub> mixtures.\nMolecular simulations reveal the mechanism behind its efficient separation.\nThis work offers fresh perspectives on the development and fabrication\nof adsorbents for efficient SF<sub>6</sub> sequestration.