title: Defect-dependent colossal negative thermal expansion in UiO-66(Hf) metal-organic framework.
abstract: Thermally-densified hafnium terephthalate UiO-66(Hf) is shown to exhibit the strongest isotropic negative thermal expansion (NTE) effect yet reported for a metal-organic framework (MOF). Incorporation of correlated vacancy defects within the framework affects both the extent of thermal densification and the magnitude of NTE observed in the densified product. We thus demonstrate that defect inclusion can be used to tune systematically the physical behaviour of a MOF.
authors: Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, UK. andrew.goodwin@chem.ox.ac.uk.
authors: Matthew J
authors: MJ
authors: Cliffe
authors: Joshua A
authors: JA
authors: Hill
authors: Claire A
authors: CA
authors: Murray
authors: François-Xavier
authors: FX
authors: Coudert
authors: Andrew L
authors: AL
authors: Goodwin