4.6 Article

Acoustic phonons and negative thermal expansion in MOF-5

Journal

PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 39, Pages 21144-21152

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp01701c

Keywords

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Funding

  1. NERC
  2. CrystalMaker Software Ltd.
  3. EPSRC [EP/F067496]
  4. UoE HPCx Ltd at the University of Edinburgh
  5. Cray Inc
  6. NAG Ltd
  7. Office of Science and Technology through EPSRC
  8. EPSRC [EP/F067496/1] Funding Source: UKRI
  9. Engineering and Physical Sciences Research Council [EP/F067496/1] Funding Source: researchfish

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The mechanism of negative thermal expansion (NTE) in MOF-5 has been studied using a rigid unit mode analysis of the phonons responsible for NTE. In addition to confirming the role of the previously proposed optic 'trampoline mode' mechanism [Lock et al., Dalton Trans., 2013, 42, 1933-2320], we have identified a new acoustic mode mechanism that makes a major contribution to the macroscopic NTE of this framework.

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