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Engineering Porosity Through Defects in a Giant Pore Metal–Organic Framework

preprint
submitted on 23.08.2020 and posted on 24.08.2020 by Adam Sapnik, Duncan Johnstone, Sean M. Collins, Giorgio Divitini, Alice Bumstead, Christopher Ashling, Philip A. Chater, Tim Johnson, David A. Keen, Thomas Bennett

Defect engineering is a powerful tool that can be used to tailor the properties of metal–organic frameworks (MOFs). Here, we incorporate defects through ball milling to systematically vary the porosity of the giant pore MOF, MIL-100 (Fe). We show that milling leads to the breaking of metal–linker bonds, generating more coordinatively unsaturated metal sites, and ultimately causes amorphisation. Pair distribution function analysis shows the hierarchical local structure is partially

retained, even in the amorphised material. We find that the solvent toluene stabilises the MIL-100 (Fe) framework against collapse and leads to a substantial rentention of porosity over the non-stabilised material.

History

Email Address of Submitting Author

tdb35@cam.ac.uk

Institution

university of cambridge

Country

uk

ORCID For Submitting Author

0000-0003-3717-3119

Declaration of Conflict of Interest

T.J. works for a company with interest in commercialisation of MOF materials.

Version Notes

version 1.0

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