In situ static and dynamic light scattering and scanning electron microscopy study on the crystallization of the dense zinc imidazolate framework ZIF-zni

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Hikov, T.; Schröder, C.A.; Cravillon, J.; Wiebcke, M.; Huber, K.: In situ static and dynamic light scattering and scanning electron microscopy study on the crystallization of the dense zinc imidazolate framework ZIF-zni. In: Physical Chemistry Chemical Physics 14 (2012), Nr. 2, S. 511-521. DOI: https://doi.org/10.1039/c1cp22855b

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Abstract: 
The kinetics and mechanism of crystallization of the dense zinc imidazolate framework with zni topology, from comparatively dilute methanol solutions containing Zn(NO3)·6H2O and imidazole with variation of the zinc-to-imidazole ratio, were followed in situ by time-resolved static and dynamic light scattering. The light scattering data revealed that metastable primary particles of about 100 nm in diameter form rapidly upon mixing the component solutions. After a lag time that is dependent on the imidazole concentration, the primary particles aggregate into secondary particles by a monomer addition mechanism with the primary particles as the monomers. Complementary scanning electron microscopy revealed that further evolution of the secondary particles is a complex process involving polycrystalline intermediates, the non-spherical morphologies of which depend on the initial zinc-to-imidazole ratio. Time and location of the first appearance of crystalline order could so far not be established. The pure-phase ZIF-zni crystals obtained after 240 min are twins. The aspect ratio of the tetragonal crystals can be controlled via the zinc-to-imidazole ratio. © 2011 The Owner Societies.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: article
Publishing status: publishedVersion
Issue Date: 2012
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
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1 image of flag of Germany Germany 75 65.22%
2 image of flag of China China 11 9.57%
3 image of flag of United States United States 9 7.83%
4 image of flag of Russian Federation Russian Federation 4 3.48%
5 image of flag of Argentina Argentina 3 2.61%
6 image of flag of Greece Greece 2 1.74%
7 image of flag of France France 2 1.74%
8 image of flag of Czech Republic Czech Republic 2 1.74%
9 image of flag of Australia Australia 2 1.74%
10 image of flag of Indonesia Indonesia 1 0.87%
    other countries 4 3.48%

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