Insights into Structural Details of Zeolites Via Three-Dimensional Electron Diffraction
- Type: Conference Presentation
- Conference Type: AIChE Annual Meeting
- Presentation Date: November 10, 2021
- Duration: 25 minutes
- Skill Level: Intermediate
- PDHs: 0.50
X-ray diffraction method has been routinely applied for structural determination of crystalline materials. However, challenges remain on the structural analysis of nanocrystalline materials which are too small to be studied by single crystal X-ray diffraction (SCXRD). Powder X-ray diffraction are the alternatives. Nevertheless, additional challenges rise due to peak overlapping.
By taking the advantages of the short wavelength of electron, three-dimensional electron diffraction (3DED) has been developed to meet these challenges1,2, and it has been used for structural analysis of complex zeolites3. For example, one of the most complicated zeolitic structures, PST-5, has been determined by 3DED recently. Notably, only by using 3DED, we can discover and fundamentally understand the unique 3D-3D topotactic transformation, which takes advantage of weak bonding in PST-5, and transforms to PST-64. By adopting the transformation, it could open a new way for synthesis of targeted zeolites, especially those which may not be feasible by conventional methods.
(1) Wan, W.; Sun, J.; Su, J.; Hovmöller, S.; Zou, X. J. Appl. Crystallogr. 2013, 46, 1863.
(2) Huang, Z.; Ge, M.; Carraro, F.; Doonan, C.; Falcaro, P.; Zou, X. Faraday Discuss. 2021, 225, 118.
(3) Huang, Z.; Willhammar, T.; Zou, X. Chem. Sci. 2021, 12, 1206.
(4) Huang, Z.; Seo, S.; Shin, J.; Wang, B.; Bell, R. G.; Hong, S. B.; Zou, X. Nat. Commun. 2020, 11, 3762.
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