Issue 10, 2012
From the journal:

Chemical Science

Supramolecular mechanics in a metal–organic framework†

Joseph M. Ogborn,a   Ines E. Collings,a   Stephen A. Moggach,b   Amber L. Thompsona  and  Andrew L. Goodwin*a  

* Corresponding authors

a Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford, UK
E-mail: andrew.goodwin@chem.ox.ac.uk
Fax: +44 (0)1865 272690
Tel: +44 (0)1865 272137

b Department of Chemistry, University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh, UK

Abstract

A combination of variable-temperature and variable-pressure single-crystal and powder X-ray diffraction is used to study the thermo- and piezo-mechanical properties of the metal–organic framework (MOF) silver(I) 2-methylimidazolate, Ag(mim). We find the material to exhibit a number of anomalous mechanical properties: negative thermal expansion, colossal positive thermal expansion and the most extreme negative linear compressibility yet observed for a MOF. By considering the mechanical response of individual supramolecular motifs we are able to rationalise the varied and unconventional behaviour of the bulk material. A general inverse correspondence between strength of supramolecular interaction and magnitude of mechanical response is identified. We propose that the consideration of MOF structures in terms of their underlying mechanical building units provides a straightforward qualitative method of directing framework design in order to maximise anomalous mechanical response.

Graphical abstract: Supramolecular mechanics in a metal–organic framework

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Article information

DOI
https://doi.org/10.1039/C2SC20596C
Article type
Edge Article
Submitted
11 May 2012
Accepted
04 Jul 2012
First published
06 Jul 2012

Chem. Sci., 2012,3, 3011-3017

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Supramolecular mechanics in a metal–organic framework

J. M. Ogborn, I. E. Collings, S. A. Moggach, A. L. Thompson and A. L. Goodwin, Chem. Sci., 2012, 3, 3011 DOI: 10.1039/C2SC20596C

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