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Instruments / Technical Area	Publication Details	Published	Actions
I22-Small angle scattering & Diffraction	Flux melting of metal–organic frameworks Louis Longley , Sean M. Collins , Shichun Li , Glen J. Smales , Ilknur Erucar , Ang Qiao , Jingwei Hou , Cara M. Doherty , Aaron W. Thornton , Anita J. Hill , Xiao Yu , Nicholas J. Terrill , Andrew J. Smith , Seth M. Cohen , Paul A. Midgley , David A. Keen , Shane G. Telfer , Thomas Bennett Chemical Science 341 DOI: 10.1039/C8SC04044C Diamond Proposal Number(s): [18236] Open Access Show Abstract ▼ Abstract: Recent demonstrations of melting in the metal–organic framework (MOF) family have created interest in the interfacial domain between inorganic glasses and amorphous organic polymers. The chemical and physical behaviour of porous hybrid liquids and glasses is of particular interest, though opportunities are limited by the inaccessible melting temperatures of many MOFs. Here, we show that the processing technique of flux melting, ‘borrowed’ from the inorganic domain, may be applied in order to melt ZIF-8, a material which does not possess an accessible liquid state in the pure form. Effectively, we employ the high-temperature liquid state of one MOF as a solvent for a secondary, non-melting MOF component. Differential scanning calorimetry, small- and wide-angle X-ray scattering, electron microscopy and X-ray total scattering techniques are used to show the flux melting of the crystalline component within the liquid. Gas adsorption and positron annihilation lifetime spectroscopy measurements show that this results in enhanced, accessible porosity to a range of guest molecules in the resultant flux melted MOF glass.	Feb 2019
I15-1-X-ray Pair Distribution Function (XPDF) I22-Small angle scattering & Diffraction	Metal-organic framework glasses with permanent accessible porosity Chao Zhou , Louis Longley , Andraž Krajnc , Glen J. Smales , Ang Qiao , Ilknur Erucar , Cara M. Doherty , Aaron W. Thornton , Anita J. Hill , Christopher W. Ashling , Omid T. Qazvini , Seok J. Lee , Philip A. Chater , Nicholas J. Terrill , Andrew J. Smith , Yuanzheng Yue , Gregor Mali , David A. Keen , Shane G. Telfer , Thomas D. Bennett Nature Communications 9 DOI: 10.1038/s41467-018-07532-z Diamond Proposal Number(s): [18236] Open Access Show Abstract ▼ Abstract: To date, only several microporous, and even fewer nanoporous, glasses have been produced, always via post synthesis acid treatment of phase separated dense materials, e.g. Vycor glass. In contrast, high internal surface areas are readily achieved in crystalline materials, such as metal-organic frameworks (MOFs). It has recently been discovered that a new family of melt quenched glasses can be produced from MOFs, though they have thus far lacked the accessible and intrinsic porosity of their crystalline precursors. Here, we report the first glasses that are permanently and reversibly porous toward incoming gases, without post-synthetic treatment. We characterize the structure of these glasses using a range of experimental techniques, and demonstrate pores in the range of 4 – 8 Å. The discovery of MOF glasses with permanent accessible porosity reveals a new category of porous glass materials that are elevated beyond conventional inorganic and organic porous glasses by their diversity and tunability.	Nov 2018

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