Facile mechanosynthesis of amorphous zeolitic imidazolate frameworks |
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Authors: | Bennett Thomas D Cao Shuai Tan Jin Chong Keen David A Bithell Erica G Beldon Patrick J Friscic Tomislav Cheetham Anthony K |
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Affiliation: | Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, UK. |
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Abstract: | A fast and efficient mechanosynthesis (ball-milling) method of preparing amorphous zeolitic imidazolate frameworks (ZIFs) from different starting materials is discussed. Using X-ray total scattering, N(2) sorption analysis, and gas pycnometry, these frameworks are indistinguishable from one another and from temperature-amorphized ZIFs. Gas sorption analysis also confirms that they are nonporous once formed, in contrast to activated ZIF-4, which displays interesting gate-opening behavior. Nanoparticles of a prototypical nanoporous substituted ZIF, ZIF-8, were also prepared and shown to undergo amorphization. |
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