Liesegang Banding for Controlled Size and Growth of Zeolitic-Imidazolate Frameworks
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Wiley-VCH Verlag
Abstract
Here, the formation of periodic precipitation (Liesegang bands) from hybrid (organic–inorganic) components is reported, namely ZIF-8, ZIF-67, and their mixed metal derivatives. The spacing and width laws that characterize the Liesegang system are determined and the resulting pattern is exploited to crystal engineer various sizes and doping of the ZIF material. Several key parameters that govern the crystallization process of ZIF-8 are investigated in each band and the growth of the particles in each band is found to follow an Ostwald ripening mechanism. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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Keywords
Controlled size, Crystal growth, Mixed metals, Periodic precipitation, Zeolitic imidazolate frameworks, Doping (additives), Crystallization process, Liesegang, Liesegang bands, Mixed-metals, Ostwald ripening mechanism, Periodic precipitations, Precipitation (chemical)