Differentiating fundamental structural units during the dissolution of zeolite A

Meza, L. Itzel; Anderson, Michael W.; Agger, Jonathan R.

doi:10.1039/b701301a

Cited by 22 publications

(18 citation statements)

References 16 publications

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“…[23,25] All three surface terminations have been revealed in either ex situ or in situ dissolution AFM studies of aluminosilicate zeolite A. [26][27][28] Atomistic simulations on siliceous zeolite A have found these three terminations to be close in energy, with termination at the S4Rs of complete sodalite cages to be the most stable. [25,28] Simulations for zeolite A reveal the same trend.…”

Section: Resultsmentioning

confidence: 99%

Materials Discovery and Crystal Growth of Zeolite A Type Zeolitic–Imidazolate Frameworks Revealed by Atomic Force Microscopy

Cubillas

Anderson

Attfield

2013

Chemistry A European J

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A new zeolitic-imidazolate framework (ZIF), [Zn(imidazolate)2-x(benzimidazolate)x], that has the zeolite A (LTA) framework topology and contains relatively inexpensive organic linkers has been revealed using in situ atomic force microscopy. The new material was grown on the structure-directing surface of [Zn(imidazolate)1.5(5-chlorobenzimidazolate)0.5] (ZIF-76) crystals, a metal-organic framework (MOF) that also possesses the LTA framework topology. The crystal growth processes for both [Zn(imidazolate)2-x(benzimidazolate)x] and ZIF-76 were observed using in situ atomic force microscopy; it is the first time the growth process of a nanoporous material with the complex zeolite A (LTA) framework topology has been monitored temporally at the nanoscale. The results reveal the crystal growth mechanisms and possible surface terminations on the {100} and {111} facets of the materials under low supersaturation conditions. Surface growth of these structurally complex materials was found to proceed through both "birth-and-spread" and spiral crystal-growth mechanisms, with the former occurring through the nucleation and spreading of metastable and stable sub-layers reliant on the presence of non-framework species to bridge the framework during formation. These results support the notion that the latter process may be a general mechanism of surface crystal growth applicable to numerous crystalline nanoporous materials of differing complexity and demonstrate that the methodology of seeded crystal growth can be used to discover previously unobtainable ZIFs and MOFs with desirable framework compositions.

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Section: Resultsmentioning

confidence: 99%

Materials Discovery and Crystal Growth of Zeolite A Type Zeolitic–Imidazolate Frameworks Revealed by Atomic Force Microscopy

Cubillas

Anderson

Attfield

2013

Chemistry A European J

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“…Upon dissolution, the most fragile bonds in a structure are broken so that discrete units are removed from the surface. This implies dissolution does not involve a statistical removal of arbitrary "pieces", but rather the extraction of discrete well-defined species, so that the remaining surface ideally consists of closed tiles only [4,5]. This process can be observed with 'contact-mode' Atomic Force Microscopy (AFM), revealing the relevance of NBUs in describing a zeolite crystal.…”

Section: Introductionmentioning

confidence: 99%

“…The potential of 'contact-mode' AFM for investigating the growth of zeolites was initially demonstrated by Brent et al (2008) for zeolite L [6] and by Meza et al (2007) for zeolite A [5]. Very recently, Anderson et al (2017) extended this approach and combined the information on prevailing growth patterns and features on the crystal surface with other techniques to gain deeper insight in the crystal growth.…”

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confidence: 99%

Evolution of the crystal growth mechanism of zeolite W (MER) with temperature

Houlleberghs

Breynaert

Asselman

et al. 2019

Microporous and Mesoporous Materials

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The morphology of zeolite W (MER topology) synthesized from Hydrated Silicate Ionic Liquids (HSILs) shows a distinct temperature dependence, reflected in a fundamental difference in the underlying crystal growth mechanism as revealed by Atomic Force Microscopy (AFM). Zeolite W crystals obtained at 90 °C develop in a highly supersaturated solution through birth and spread growth, whereas synthesis at 175 °C results in elongated, spiral grown zeolite W particles. Supersaturation was measured through the concentration of dissolved aluminate, being the limiting species. The evolution of the aluminum concentration during crystallization at different temperatures was monitored with 27 Al Nuclear Magnetic Resonance (NMR) spectroscopy. Supersaturation conditions determine the nucleation rate, the prevailing crystal growth mechanism, and resulting crystal morphology.

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“…Surface terraces of one unit cell or a simple fraction of a unit cell are frequently observed. 5,8,11 Terrace shapes are usually consistent to a greater or lesser degree with the symmetry at the surface of the crystal. 11 These observations are consistent with certain surface structures being much preferred with lower free energies.…”

Section: Generic Model Of Crystal Growthmentioning

confidence: 97%

CrystalGrower: a generic computer program for Monte Carlo modelling of crystal growth

et al. 2021

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Differentiating fundamental structural units during the dissolution of zeolite A

Abstract: In situ atomic force microscopy (AFM) is used to differentiate temporally both structure and mechanism in the removal of fundamental structural units during the dissolution of zeolite A.

Cited by 22 publications

References 16 publications

Materials Discovery and Crystal Growth of Zeolite A Type Zeolitic–Imidazolate Frameworks Revealed by Atomic Force Microscopy

Materials Discovery and Crystal Growth of Zeolite A Type Zeolitic–Imidazolate Frameworks Revealed by Atomic Force Microscopy

Evolution of the crystal growth mechanism of zeolite W (MER) with temperature

CrystalGrower: a generic computer program for Monte Carlo modelling of crystal growth

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