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Issue 8, 2020
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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., 2020,22, 2505-2512
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, 22, 2505
DOI: 10.1039/D0GC00546K

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