Solvent-Free Synthesis of a new Perfluorinated MIL-53(Al) with a Genuine Temperature-Induced Breathing Effect

29 December 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

We report on the solvent-free synthesis of the perfluorinated analogue of the well-known breathing metal-organic framework MIL-53(Al), i.e., F4-MIL-53(Al), featuring tetrafluoroterephthalic acid as linker. The crystal structure was solved and refined from powder X-ray diffraction data and confirmed to be isoreticular with MIL-53(Al). In contrast to the MIL-53(Al) analogue, F4-MIL-53(Al) displays a peculiar breathing effect solely induced by the temperature and not by the desorption of molecules at increasing temperature. This unique behaviour is experimentally reported here for the first time.

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Electronic Supplementary Information (ESI)
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Synthetic procedures, instrumental details, Rietveld refinement details, SEM images, additional SS-NMR spectra, VT-XRPD patterns
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