Thermal Expansion Matching via Framework Flexibility in Zinc Dicyanometallates

Goodwin, A. L. and Kennedy, B. J. and Kepert, C. J. (2009) Thermal Expansion Matching via Framework Flexibility in Zinc Dicyanometallates. Journal of the American Chemical Society, 131 (18). pp. 6334-6335. ISSN 0002-7863 Web Edition ISSN: 1520-5126 DOI 10.1021/ja901355b

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Abstract

The thermal expansion properties of two isostructural zinc dicyanometallates 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·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 cocrystallized species), suggesting a methodology of eliminating thermal strain in multicomponent assemblies.

Item Type:	Article
Uncontrolled Keywords:	08AREP; IA57;
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Journal of the American Chemical Society
Volume:	131
Page Range:	pp. 6334-6335
Identification Number:	10.1021/ja901355b
Depositing User:	Sarah Humbert
Date Deposited:	21 May 2009 09:32
Last Modified:	23 Jul 2013 09:54
URI:	http://eprints.esc.cam.ac.uk/id/eprint/1000

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