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Mechanochemical synthesis of mixed metal, mixed linker, glass-forming metal–organic frameworks

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Abstract

Current methodologies to produce glass forming metal–organic frameworks (MOFs) rely on non-scalable solvothermal syntheses which have high energy requirements, relatively low yields and large teratogenic solvent usage. Here we use a mechanochemical method to produce the glass-forming MOFs, ZIF-62 and ZIF-UC-5, in 30 minutes at room temperature, using microlitre quantities of solvent and stoichiometric amounts of organic linkers. This method facilitates the accurate synthesis of ZIF-62 structures containing both Co and Zn, allowing the effect of metal-ion dopant upon melting temperature to be studied for the first time. Further to this, we present variable organic linker ratio series of ZIF-62 and of ZIF-UC-5. The specific composition of the materials in the series is made possible by the mechanochemical method. We also present a greener solvothermal method to form ZIF-62, which is capable of producing crystalline materials of suffcient quality for single crystal diffraction experiments.

Graphical abstract: Mechanochemical synthesis of mixed metal, mixed linker, glass-forming metal–organic frameworks

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Article information


Submitted
13 Feb 2020
Accepted
25 Mar 2020
First published
25 Mar 2020

Green Chem., 2020, Advance Article
Article type
Paper

Mechanochemical synthesis of mixed metal, mixed linker, glass-forming metal–organic frameworks

M. F. Thorne, M. L. R. Gómez, A. M. Bumstead, S. Li and T. D. Bennett, Green Chem., 2020, Advance Article , DOI: 10.1039/D0GC00546K

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