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Issue 10, 2016
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Compositional dependence of anomalous thermal expansion in perovskite-like ABX3 formates

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Abstract

The compositional dependence of thermal expansion behaviour in 19 different perovskite-like metal–organic frameworks (MOFs) of composition [AI][MII(HCOO)3] (A = alkylammonium cation; M = octahedrally-coordinated divalent metal) is studied using variable-temperature X-ray powder diffraction measurements. While all systems show essentially the same type of thermomechanical response—irrespective of their particular structural details—the magnitude of this response is shown to be a function of AI and MII cation radii, as well as the molecular anisotropy of AI. Flexibility is maximised for large MII and small AI, while the shape of AI has implications for the direction of framework hingeing.

Graphical abstract: Compositional dependence of anomalous thermal expansion in perovskite-like ABX3 formates

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Publication details

The article was received on 24 Aug 2015, accepted on 07 Oct 2015 and first published on 08 Oct 2015


Article type: Paper
DOI: 10.1039/C5DT03263F
Citation: Dalton Trans., 2016,45, 4169-4178
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    Compositional dependence of anomalous thermal expansion in perovskite-like ABX3 formates

    I. E. Collings, J. A. Hill, A. B. Cairns, R. I. Cooper, A. L. Thompson, J. E. Parker, C. C. Tang and A. L. Goodwin, Dalton Trans., 2016, 45, 4169
    DOI: 10.1039/C5DT03263F

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