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SUMMARY:Looking Beyond Crystallinity in  Metal-Organic Frameworks  - Prof.
  Thomas Bennett\, Dept of Materials Science and Metallurgy\, University of
  Cambridge
DTSTART:20230209T150000Z
DTEND:20230209T160000Z
UID:TALK196831@talks.cam.ac.uk
CONTACT:Julie Smith
DESCRIPTION:Metal-organic framework (MOF) materials are often ordered\, (c
 rystalline) solids. Order—or uniformity— is frequently held to be adva
 ntageous\, or even pivotal\, to our ability to engineer useful properties 
 in a rational way. Here\, we will look at the difference between amorphous
 \, and glassy solids\, and cover the mechanisms underpinning the shear-ind
 uced collapse of MOFs. Using the crystalline MIL-100 / amorphous Fe-BTC pa
 iring as an example\, we will then address the poorly understood structure
  of the latter. Specifically\, we show an experimental-computational appro
 ach to generate a ‘structure’ for Fe-BTC\, and show it may outperform 
 MIL-100 In terms of gas separation (1). We will demonstrate the several fa
 milies of MOFs known to form stable liquids at high temperature (2\,3)\, w
 ith quenching leading to the formation of glasses which retain the three-d
 imensional inorganic-organic bonding of the crystalline phase. These are a
  new category of glass\, exterior to metallic\, inorganic and organic spec
 ies. The uses of such materials will be evaluated\, before we finally show
  how the formation of composites containing both MOF\, and glass phases ma
 y find use in applications (4\,5). \n\n\n1 Sapnik\, A. F. et al. Mixed hie
 rarchical local structure in a disordered metal-organic framework. Nat Com
 mun 12\, 2062\, (2021). \n2 Shaw\, B. K. et al. Melting of hybrid organic-
 inorganic perovskites. Nat Chem 13\, 778–785\, doi:10.1038/s41557-021-00
 681-7 (2021). \n3 Bennett\, T. D.\, Coudert\, F. X.\, James\, S. L. & Coop
 er\, A. I. The changing state of porous materials. Nat Mater 20\, 1179-118
 7\, (2021). \n4 Hou\, J. et al. Liquid-phase sintering of lead halide pero
 vskites and metal-organic framework glasses. Science 374\, 621-625 (2021).
  \n5 Longley\, L. et al. Metal-Organic Framework and Inorganic Glass Compo
 sites. Nat Commun 11\, 5800 (2020). \n
LOCATION:Goldsmith's 2 &amp\; https://us06web.zoom.us/j/81688365420?pwd=b3
 RpdHgxNVhWbWQrbXluMUxYNWVtQT09 Meeting ID: 816 8836 5420 Passcode: 047859
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