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Giant negative linear compression positively coupled to massive thermal expansion in a metal–organic framework

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  • Weizhao Cai

    (Faculty of Chemistry, Adam Mickiewicz University)

  • Andrzej Katrusiak

    (Faculty of Chemistry, Adam Mickiewicz University)

Abstract

Materials with negative linear compressibility are sought for various technological applications. Such effects were reported mainly in framework materials. When heated, they typically contract in the same direction of negative linear compression. Here we show that this common inverse relationship rule does not apply to a three-dimensional metal–organic framework crystal, [Ag(ethylenediamine)]NO3. In this material, the direction of the largest intrinsic negative linear compression yet observed in metal–organic frameworks coincides with the strongest positive thermal expansion. In the perpendicular direction, the large linear negative thermal expansion and the strongest crystal compressibility are collinear. This seemingly irrational positive relationship of temperature and pressure effects is explained and the mechanism of coupling of compressibility with expansivity is presented. The positive coupling between compression and thermal expansion in this material enhances its piezo-mechanical response in adiabatic process, which may be used for designing new artificial composites and ultrasensitive measuring devices.

Suggested Citation

  • Weizhao Cai & Andrzej Katrusiak, 2014. "Giant negative linear compression positively coupled to massive thermal expansion in a metal–organic framework," Nature Communications, Nature, vol. 5(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5337
    DOI: 10.1038/ncomms5337
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    Cited by:

    1. Davide Caprini & Francesco Battista & Paweł Zajdel & Giovanni Di Muccio & Carlo Guardiani & Benjamin Trump & Marcus Carter & Andrey A. Yakovenko & Eder Amayuelas & Luis Bartolomé & Simone Meloni & Yar, 2024. "Bubbles enable volumetric negative compressibility in metastable elastocapillary systems," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Dong Fan & Supriyo Naskar & Guillaume Maurin, 2024. "Unconventional mechanical and thermal behaviours of MOF CALF-20," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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