Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 131, Issue 18, Pages 6334-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja901355b
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Funding
- Australian Research Council Discovery Project Grant
- Australian Synchrotron Research Program
- Commonwealth of Australia
- Trinity College, Cambridge and EPSRC (UK)
- EPSRC [EP/G004528/1, EP/G004528/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G004528/2, EP/G004528/1] Funding Source: researchfish
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The thermal expansion properties of two isostructural zinc dicyanometaltates that crystallize with and without the inclusion of a weakly interacting secondary crystalline phase have been investigated using variable temperature single-crystal and powder X-ray diffraction. The guest-free Zn[Au(CN)(2)](2) framework was found to show very strong anisotropic positive and negative thermal expansion. In contrast, its cocrystal analogue Zn[Ag(CN)(2)](2)center dot xAgCN exhibited much more moderate behavior, such that the coefficient of thermal expansion for the host Zn[M(CN)(2)](2) framework now matched that of crystalline AgCN. It was proposed that this correlation points to a more general ability of highly flexible framework materials to match the thermal expansivity of adhered phases (e.g., substrates, sorbates, or cocrystattized species), suggesting a methodology of eliminating thermal strain in multicomponent assemblies.
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