Welcome to the Hybrid Materials group!

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We are based in the Department of Materials Science and Metallurgy (University of Cambridge), and focus on the the intersection of the hybrid material and amorphous domains. We also work on the thermo-mechanical properties of crystalline framework materials.

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High Pressure – High Temperature Phase Diagrams of MOFs

Well done to Remo on publications in Nature Materials and J. Am. Chem. Soc. on the first high-pressure high-temperature phase diagrams of metal-organic frameworks.

The first looks at the negative melting slope of ZIF-62, i.e. why it becomes easier to melt with applied pressure:

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Pressure promoted low-temperature melting of metal-organic frameworks

R. N. Widmer, G. I. Lampronti, S. Anzellini, R. Gaillac, S. Farsang, C. Zhou, A. M. Belenguer, H. Palmer, A. K. Kleppe, M. T. Wharmby,  S. A. T. Redfern, F. X. Coudert, S. G. Macleod, T. D. Bennett,Nat. Mater., 2019, DOI: 10.1038/s41563-019-0317-4.

 

The second looks at polymorphism in the ZIF-4 family, and shows the rich array of unusual phases which might be obtained by the simultaneous application of pressure and temperature:

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Rich polymorphism of a metal-organic framework in oressure-temperature space

R. N. Widmer, G. I. Lampronti, S. Chibani, C. W. Wilson, S. Anzellini, S. Farsang, A. K. Kleppe, N. P. M. Casati, S. G. MacLeod, S. A. T. Redfern, F. X. Coudert and T. D. Bennett*,   J. Am. Chem. Soc., 2019141, 9330-9337.

Metal-organic Framework Crystal-Glass Composites

Congratulations to Jingwei, Chris and the team on the publication of their paper on MOF CGCs in Nature Communications!

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The work demonstrates how embedding MOFs inside a MOF glass can result in the stabilization of high temperature forms of the crystal structure, even at room temperature.

Metal-organic framework crystal-glass composites

J. Hou, C. W. Ashling, S. M. Collins, A. Krajnc, C. Zhou, L. Longley, D. N. Johnstone, P. Chater, S. Li, M. V. Coulet, P. L. Llewellyn, F. X. Coudert, D. A. Keen, P. A. Midgley, G. Mali, V. Chen, T. D. Bennett,* Nat. Commun., 2019, 10, 2580.

Metal-organic framework glasses with permanent accessible porosity

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.

Metal-organic framework glasses with permanent accessible porosity

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