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Capturing persistent fluorinated pollutants: leveraging a permanently porous and regenerable halogen-bonded organic framework
Mannina, Ronin P. Hippely, Adria S. Sanchez Hernandez, J. Julian Moghadasnia, Michael P. McGuirk, C. Michael
Mannina, Ronin P.
Hippely, Adria S.
Sanchez Hernandez, J. Julian
Moghadasnia, Michael P.
McGuirk, C. Michael
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2026-04
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Abstract
Persistent fluorinated pollutants present serious environmental and public health challenges due to their high toxicity, resistance to degradation, and persistence in the environment. Perfluorinated alkyl substances (PFAS) are widely associated with adverse health effects, while fluorinated gases such as hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs) also drive climate change through their high global warming potential (GWP). Although porous materials such as metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) have been shown to selectively adsorb fluorinated molecules, regeneration and long-term cycling of these materials remains difficult. Halogen-bonded organic frameworks (XOFs) offer a promising alternative as the noncovalent nature of the halogen bond enables a higher degree of regenerability. Recent work from the McGuirk Research Group established the first permanently porous XOF, B3TFIOx, which uses halogen-bonding to assemble molecules into a stable porous architecture with a highly fluorinated pore space. Building on this discovery, this project proposes B3TFIOx as a candidate material for regenerable, selective fluorinated gas capture. Its fluorine-lined channels, like those in other porous materials used for selective fluorinated guest adsorption, make it a strong platform for investigating uptake of HFC’s and PFC’s through fluorophilic pore space interactions. Proposed dynamic column breakthrough experiments will quantify adsorption capacity and selectivity, while crystallization studies post-adsorption will assess recyclability, collectively evaluating B3TFIOx as a regenerable sorbent for fluorinated gas capture. More broadly, this work advances the first application-oriented study of fluorinated gas capture with a permanently porous XOF, highlighting halogen-bonded frameworks as a new potential regenerative platform for persistent pollutant sequestration.
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