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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	Melt-quenched glasses of metal–organic frameworks Thomas Bennett , Yuanzheng Yue , Peng Li , Ang Qiao , Haizheng Tao , Neville Greaves , Tom Richards , Giulio Lampronti , Simon Redfern , Frédéric Blanc , Omar K. Farha , Joseph T. Hupp , Anthony K. Cheetham , David Keen Journal Of The American Chemical Society DOI: 10.1021/jacs.5b13220 Diamond Proposal Number(s): [14249] Open Access Show Abstract ▼ Abstract: Crystalline solids dominate the field of metal-organic frameworks (MOFs), with access to the liquid and glass states of matter usually prohibited by relatively low temperatures of thermal decomposition. In this work, we give due consideration to framework chemistry and topology to expand the phenomenon of the melting of three-dimensional MOFs, linking crystal chemistry to framework melting temperature and kinetic fragility of the glass-forming liquids. Here we show that melting temperatures can be lowered by altering the chemistry of the crystalline MOF state, which provides a route to facilitate the melting of other MOFs. The glasses formed upon vitrification are chemically and structurally distinct from the three other existing categories of melt-quenched glasses (inorganic non-metallic, organic and metallic), and retain the basic metal-ligand connectivity of crystalline MOFs, which connects their mechanical properties to starting chemical composition. The transfer of functionality from crystal to glass points towards new routes to tunable, functional hybrid glasses.	Feb 2016
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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