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Published (Version of record)CC BY-NC V4.0, Open Access
Published (Version of record)CC BY-NC V4.0, Open
Journal article
A metal-organic framework with ultrahigh glass-forming ability
Science Advances, Vol.4(3), p.eaao6827
01/03/2018
PMID: 29536040
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Source: InCites
Abstract
Glass-forming ability (GFA) is the ability of a liquid to avoid crystallization during cooling. Metal-organic frameworks (MOFs) are a new class of glass formers (1-3), with hitherto unknown dynamic and thermodynamic properties. We report the discovery of a new series of tetrahedral glass systems, zeolitic imidazolate framework-62 (ZIF-62) [Zn(Im(2-x)bIm(x))], which have ultrahigh GFA, superior to any other known glass formers. This ultrahigh GFA is evidenced by a high viscosity eta (10(5) Pa.s) at the melting temperature T-m, a large crystal-glass network density deficit (Delta rho/rho(g))(network), no crystallization in supercooled region on laboratory time scales, a low fragility (m = 23), an extremely high Poisson's ratio (nu = 0.45), and the highest T-g/T-m ratio (0.84) ever reported. T-m and T-g both increase with benzimidazolate (bIm) content but retain the same ultrahigh T-g/T-m ratio, owing to high steric hindrance and frustrated network dynamics and also to the unusually low enthalpy and entropy typical of the soft and flexible nature of MOFs. On the basis of these versatile properties, we explain the exceptional GFA of the ZIF-62 system.
Details
- Title
- A metal-organic framework with ultrahigh glass-forming ability
- Creators
- Ang Qiao - Wuhan University of TechnologyThomas D. Bennett - University of CambridgeHaizheng Tao - Wuhan University of TechnologyAndraz Krajnc - National Institute of ChemistryGregor Mali - National Institute of ChemistryCara M. Doherty - Commonwealth Scientific and Industrial Research OrganisationAaron W. Thornton - Commonwealth Scientific and Industrial Research OrganisationJohn C. Mauro - Pennsylvania State UniversityG. Neville Greaves - University of CambridgeYuanzheng Yue - Aalborg University
- Publication Details
- Science Advances, Vol.4(3), p.eaao6827
- Publisher
- American Association for the Advancement of Science (AAAS)
- Number of pages
- 7
- Grant note
- Funding: A.Q., H.T., G.N.G., J.C.M., and Y.Y. thank the National Natural Science Foundation of China (no. 51772223), the“1000 Talents ”Program of China, the “Strategy Scientists ”Program of Wuhan University of Technology, and Corning Incorporated for the support. T.D.B. would like to thank the Royal Society for a University Research Fellowship. A.K. and G.M. acknowledge the support of the Slovenian Research Agency. C.M.D. acknowledges the Australian Research Council Discovery Early Career Researcher Award (DE140101359) and the Veski Inspiring Women Fellowship for the support. A.W.T. acknowledges the Julius Career Award from the Commonwealth Scientific and Industrial Research Organization for the support (2014 to 2017).
- Identifiers
- 991013035776002368
- Copyright
- Copyright © 2018The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC)
- Academic Unit
- Science; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article