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Updated: Jan 24, 2026

Synthesis of Zeolites Using the ADOR Assembly-Disassembly-Organization-Reassembly Route
Published on: April 3, 2016
Liesegang Banding for Controlled Size and Growth of Zeolitic-Imidazolate Frameworks
Rita Zakhia Douaihy1, Mazen Al-Ghoul1, Mohamad Hmadeh1
1Department of Chemistry, American University of Beirut, PO Box 11-0236, Riad El Solh, Beirut, 1107-2020, Lebanon.
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.
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