David Keen: Publications

Reverse Monte Carlo study of Cu—O bond distortions in YBa2Cu3O6.9

Zeitschrift für Kristallographie De Gruyter 227:5 (2012) 280-287

Authors:

Callum A Young, Edward Dixon, Matthew G Tucker, David A Keen, Michael A Hayward, Andrew L Goodwin

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Static disorder and local structure in zinc(II) isonicotinate, a quartzlike metal–organic framework

Zeitschrift für Kristallographie De Gruyter 227:5 (2012) 313-320

Authors:

Ines E Collings, Matthew G Tucker, David A Keen, Andrew L Goodwin

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Facile mechanosynthesis of amorphous zeolitic imidazolate frameworks.

Journal of the American Chemical Society 133:37 (2011) 14546-14549

Authors:

Thomas D Bennett, Shuai Cao, Jin Chong Tan, David A Keen, Erica G Bithell, Patrick J Beldon, Tomislav Friscic, Anthony K Cheetham

Abstract:

A fast and efficient mechanosynthesis (ball-milling) method of preparing amorphous zeolitic imidazolate frameworks (ZIFs) from different starting materials is discussed. Using X-ray total scattering, N(2) sorption analysis, and gas pycnometry, these frameworks are indistinguishable from one another and from temperature-amorphized ZIFs. Gas sorption analysis also confirms that they are nonporous once formed, in contrast to activated ZIF-4, which displays interesting gate-opening behavior. Nanoparticles of a prototypical nanoporous substituted ZIF, ZIF-8, were also prepared and shown to undergo amorphization.

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Identification of the elusive hydronium ion exchanging roles with a proton in an enzyme at lower pH values.

Angewandte Chemie (International ed. in English) 50:33 (2011) 7520-7523

Authors:

Andrey Y Kovalevsky, BL Hanson, SA Mason, T Yoshida, SZ Fisher, M Mustyakimov, VT Forsyth, MP Blakeley, DA Keen, Paul Langan

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Reversible pressure-induced amorphization of a zeolitic imidazolate framework (ZIF-4).

Chemical communications (Cambridge, England) 47:28 (2011) 7983-7985

Authors:

Thomas D Bennett, Petra Simoncic, Stephen A Moggach, Fabia Gozzo, Piero Macchi, David A Keen, Jin-Chong Tan, Anthony K Cheetham

Abstract:

We report the reversible pressure-induced amorphization of a zeolitic imidazolate framework (ZIF-4, [Zn(Im)(2)]). This occurs irrespective of pore occupancy and takes place via a novel high pressure phase (ZIF-4-I) when solvent molecules are present in the pores. A significant reduction in bulk modulus upon framework evacuation is also observed for both ZIF-4 and ZIF-4-I.

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David Keen

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Reverse Monte Carlo study of Cu—O bond distortions in YBa2Cu3O6.9

Authors:

Static disorder and local structure in zinc(II) isonicotinate, a quartzlike metal–organic framework

Authors:

Facile mechanosynthesis of amorphous zeolitic imidazolate frameworks.

Authors:

Abstract:

Identification of the elusive hydronium ion exchanging roles with a proton in an enzyme at lower pH values.

Authors:

Reversible pressure-induced amorphization of a zeolitic imidazolate framework (ZIF-4).

Authors:

Abstract:

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Reverse Monte Carlo study of Cu—O bond distortions in YBa2Cu3O6.9

Authors:

Static disorder and local structure in zinc(II) isonicotinate, a quartzlike metal–organic framework

Authors:

Facile mechanosynthesis of amorphous zeolitic imidazolate frameworks.

Authors:

Abstract:

Identification of the elusive hydronium ion exchanging roles with a proton in an enzyme at lower pH values.

Authors:

Reversible pressure-induced amorphization of a zeolitic imidazolate framework (ZIF-4).

Authors:

Abstract: