Inorganic Fluorides and Related Compounds
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Abstract
Abstract
Fluorochemicals are central to the modern medicinal, agrochemical, and polymer industries, yet the sustainability of fluorochemical synthesis is challenged by an over-reliance on non-renewable fluorine sources such as fluorospar (CaF2). Recycling fluorinated waste represents a promising solution to this challenge, but to date there are limited platforms that enable both the capture of fluorinated waste products and their subsequent conversion into value-added products. Herein, we demonstrate that the robust and inexpensive Al-based metal-organic framework (MOF) MIL-160 (MIL = Matériaux de l′Institut Lavoisier) enables the capture of the waste greenhouse gas fluoroform (CHF3), a byproduct of semiconductor and fluoropolymer manufacturing, from mixtures of other fluorinated gases and from dilute emission streams. MIL-160 exhibits record-setting adsorption of CHF3 at low pressures (3.88 mmol g−1 at 0.1 bar and 298 K) and selectivity over N2 (10:90 CHF3/N2 IAST selectivity of S = 1504) owing to its unique crown ether-like binding pocket for CHF3. CHF3-loaded MIL-160 can be stored long-term and employed directly in a range of nucleophilic and metal-mediated trifluoromethylation reactions. Thus, our findings establish the first integrated strategy for the separation, storage, and utilization of CHF3, providing a pathway for transforming an environmentally problematic waste gas into a synthetically valuable reagent.
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@article{Kim2026Transforming,
title = {Transforming the Greenhouse Gas Fluoroform into a Bench-Stable Reagent for Trifluoromethylation Using an Aluminum-Based Metal-Organic Framework},
author = {Dae Won Kim and Jiachen He and Tristan A. Pitt and Jung-Hoon Lee and P. R. Baidya and S. Alexandra Lim and Daniel Nakamura and Erika L. Buckle and R. Matthew Weekly and Johnny W. Lee and Truong N. Nguyen and Phillip J. Milner},
journal = {ChemRxiv},
year = {2026},
doi = {10.26434/chemrxiv.15007820/v1},
url = {https://doi.org/10.26434/chemrxiv.15007820/v1}
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