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CMP
Credit: Jack Hobhouse

David Keen

Visiting Professor

Sub department

  • Condensed Matter Physics

Research groups

  • X-ray and neutron scattering
david.keen@physics.ox.ac.uk
Telephone: 01865 (2)72310
Clarendon Laboratory, room 106
  • About
  • Publications

Formation of a meltable purinate metal鈥搊rganic framework and its glass analogue

Chemical Communications Royal Society of Chemistry 59:6 (2022) 732-735

Authors:

Alice M Bumstead, Celia Castillo-Blas, Ignas Pakamor臈, Michael F Thorne, Adam F Sapnik, Ashleigh M Chester, Georgina Robertson, Daniel JM Irving, Philip A Chater, David A Keen, Ross S Forgan, Thomas D Bennett

Abstract:

The chemistries that can be incorporated within melt-quenched zeolitic imidazolate framework (ZIF) glasses are currently limited. Here we describe the preparation of a previously unknown purine-containing ZIF which we name ZIF-UC-7. We find that it melts and forms a glass at one of the lowest temperatures reported for 3D hybrid frameworks.

Mapping short-range order at the nanoscale in metal鈥搊rganic framework and inorganic glass composites

Nanoscale Royal Society of Chemistry 14:44 (2022) 16524-16535

Authors:

Joonatan EM Laulainen, Duncan N Johnstone, Ivan Bogachev, Louis Longley, Courtney Calahoo, Lothar Wondraczek, David A Keen, Thomas D Bennett, Sean M Collins, Paul A Midgley

Abstract:

) inorganic glass. STEM-ePDF enables separation of MOF and inorganic glass domains from atomic structure differences alone, showing abrupt changes in atomic structure at interfaces with interatomic correlation distances seen in X-ray PDF preserved at the nanoscale. These findings underline that the average bulk amorphous structure is retained at the nanoscale in the growing family of MOF glasses and composites, a previously untested assumption in PDF analyses crucial for future non-crystalline nanostructure engineering.

Formation of new crystalline qtz-[Zn(mIm)2] polymorph from amorphous ZIF-8

Chemical Communications Royal Society of Chemistry 58:85 (2022) 11949-11952

Authors:

Michael F Thorne, Celia Castillo-Blas, Lauren N McHugh, Alice M Bumstead, Georgina Robertson, Adam F Sapnik, Chloe S Coates, Farheen N Sayed, Clare P Grey, David A Keen, Martin Etter, Ivan da Silva, Krunoslav U啪arevi膰, Thomas D Bennett

Abstract:

gas sorption properties and dye adsorption ability were investigated.

Modeling the Effect of Defects and Disorder in Amorphous Metal鈥揙rganic Frameworks

Chemistry of Materials American Chemical Society (ACS) 34:20 (2022) 9042-9054

Authors:

Irene Bechis, Adam F Sapnik, Andrew Tarzia, Emma H Wolpert, Matthew A Addicoat, David A Keen, Thomas D Bennett, Kim E Jelfs

Semi鈥恆nalytic theory of multiphonon effects on the static structure factors of warm solids

Acta Crystallographica Section A: Foundations and advances International Union of Crystallography (IUCr) 78:5 (2022) 415-421

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