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Investigating the Melting Behaviour of Polymorphic Zeolitic Imidazolate Frameworks

preprint
submitted on 17.03.2020 and posted on 18.03.2020 by Alice Bumstead, Maria Laura Rios Gomez, Michael Thorne, Adam Sapnik, Louis Longley, Joshua M. Tuffnell, Dean Keeble, David A. Keen, Thomas Bennett

Recently, there has been growing interest in the amorphous states of metal–organic frameworks (MOFs). Particular focus has been given to melt-quenched MOF glasses. In this work, to improve our understanding of the factors influencing melting, the thermal response of four closely related zeolitic imidazolate frameworks (ZIFs) was studied. Electron withdrawing ligands were found to lower both the melting and glass transition temperatures, providing a promising strategy for improving the processability of MOFs in the liquid state. Crucially, dense frameworks appear to be essential for melting, with their presence also initiating the melting of open pore frameworks. This opens up the rich polymorphic landscape of ZIFs to the preparation of novel MOF liquids and glasses.

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 conflict of interest

Version Notes

Version 1.0

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