Efficient Fluorocarbons\nCapture Using Radical-Containing\nCovalent Triazine Frameworks

Efficiently capturing fluorocarbons, potent greenhouse\ngases with\nhigh global warming potentials (GWP), remains a daunting challenge\ndue to limited effective approaches for constructing high-performance\nadsorbents. To tackle this issue, we have pioneered a novel strategy\nof developing radical porous materials as effective adsorbents for\nfluorocarbon capture. The resulting radical covalent triazine framework\n(CTF), CTF-azo-R, shows exceptional fluorocarbon (perfluorohexane,\na representative model pollutant among fluorocarbons) uptake capacity\nof 270 wt %, a record-high value among all porous materials reported\nto date. Spectral characteristics, experimental studies, and theoretical\ncalculations indicate that the presence of stable radicals in CTF-azo-R\ncontributes to its superior fluorocarbon capture performance. Furthermore,\nCTF-azo-R demonstrates exceptionally high chemical and thermal stabilities\nthat fully meet the requirements for practical applications in diverse\nenvironments. Our work not only establishes radical CTF-azo-R as a\npromising candidate for fluorocarbon capture but also introduces a\nnovel approach for constructing advanced fluorocarbon adsorbents by\nincorporating radical sites into porous materials. This strategy paves\nthe way for the development of radical adsorbents, fostering advancements\nin both fluorocarbon capture and the broader field of adsorption and\nseparation.