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Mechanochemical Synthesis of Mixed Metal, Mixed Linker GlassForming Metal–Organic Frameworks

preprint
submitted on 13.02.2020 and posted on 14.02.2020 by Michael Thorne, Laura Rios, Alice Bumstead, Shichun Li, Thomas Bennett
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 tetratogenic solvent usage. Here we use a mechanochemical method to produce 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 IF-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.

History

Email Address of Submitting Author

tdb35@cam.ac.uk

Institution

University of Cambridge

Country

United Kingdom

ORCID For Submitting Author

0000-0003-3717-3119

Declaration of Conflict of Interest

No conflicts to declare

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