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Melt-quenched glasses of metal–organic frameworks

DOI: 10.1021/jacs.5b13220 DOI Help

Authors: Thomas Bennett (Department of Materials Science and Metallurgy, University of Cambridge) , Yuanzheng Yue (Wuhan University of Technology) , Peng Li (Northwestern University) , Ang Qiao (Wuhan University of Technology) , Haizheng Tao (Wuhan University of Technology) , Neville Greaves (University of Cambridge) , Tom Richards (University of Cambridge) , Giulio Lampronti (University of Cambridge) , Simon Redfern (University of Cambridge) , Frédéric Blanc (University of Liverpool) , Omar K. Farha (Northwestern University) , Joseph T. Hupp (Northwestern University) , Anthony K. Cheetham (University of Cambridge) , David Keen (Rutherford Appleton Laboratory)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society

State: Published (Approved)
Published: February 2016
Diamond Proposal Number(s): 14249

Open Access Open Access

Abstract: Crystalline solids dominate the field of metal-organic frameworks (MOFs), with access to the liquid and glass states of matter usually prohibited by relatively low temperatures of thermal decomposition. In this work, we give due consideration to framework chemistry and topology to expand the phenomenon of the melting of three-dimensional MOFs, linking crystal chemistry to framework melting temperature and kinetic fragility of the glass-forming liquids. Here we show that melting temperatures can be lowered by altering the chemistry of the crystalline MOF state, which provides a route to facilitate the melting of other MOFs. The glasses formed upon vitrification are chemically and structurally distinct from the three other existing categories of melt-quenched glasses (inorganic non-metallic, organic and metallic), and retain the basic metal-ligand connectivity of crystalline MOFs, which connects their mechanical properties to starting chemical composition. The transfer of functionality from crystal to glass points towards new routes to tunable, functional hybrid glasses.

Journal Keywords: Melting; Liquids; Ligands; Metal organic frameworks; Amorphous materials

Subject Areas: Chemistry, Materials

Instruments: B18-Core EXAFS

Added On: 22/02/2016 12:29


Discipline Tags:

Chemistry Materials Science Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS) Extended X-ray Absorption Fine Structure (EXAFS)