| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Zou, Xiaodong
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Accurate structure models and absolute configuration determination using dynamical effects in continuous-rotation 3D electron diffraction datacitations
- 2023Accurate structure models and absolute configuration determination using dynamical effects in continuous-rotation 3D electron diffraction data
- 2022Metal-hydrogen-pi-bonded organic frameworkscitations
- 2021Probing Molecular Motions in Metal-Organic Frameworks by Three-Dimensional Electron Diffractioncitations
- 2021A Tunable Multivariate Metal–Organic Framework as a Platform for Designing Photocatalystscitations
- 2019Solving a new R2lox protein structure by microcrystal electron diffractioncitations
- 2019Luminescence properties of a family of lanthanide metal-organic frameworkscitations
- 2019A metal-organic framework for efficient water-based ultra-low-temperature-driven coolingcitations
- 2018Multidimensional Disorder in Zeolite IM-18 Revealed by Combining Transmission Electron Microscopy and X-ray Powder Diffraction Analysescitations
- 2018Chitosan enhances gene delivery of oligonucleotide complexes with magnetic nanoparticles–cell-penetrating peptide ...
- 2017Disordered zeolite solved by combining electron diffraction, HRTEM and XRPD
- 2014Correlated defect nanoregions in a metal–organic frameworkcitations
- 2013Sustainable Catalysis : Rational Pd Loading on MIL-101Cr-NH2 for More Efficient and Recyclable Suzuki-Miyaura Reactionscitations
- 2013Sustainable Catalysis: Rational Pd Loading on $MIL-101Cr-NH_{2}$ for More Efficient and Recyclable Suzuki-Miyaura Reactionscitations
- 2012Structure and catalytic properties of the most complex intergrown zeolite ITQ-39 determined by electron crystallographycitations
Places of action
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conferencepaper
Disordered zeolite solved by combining electron diffraction, HRTEM and XRPD
Abstract
Zeolites are porous materials with important industrial applications. They are synthesized and used in polycrystalline form, and have complex, sometimes disordered structures, which makes their structure characterization difficult using conventional methods. IM-18 is a germanosilicate zeolite that was discovered more than 8 years ago, but its complex structure has remained elusive [1]. To determine its structure, we combined rotation electron diffraction (RED) [2] with high-resolution transmission electron microscopy (HRTEM) and powder X-ray diffraction (PXRD). The RED method combines discrete goniometer tilt (2.0-3.0°/step) with fine beam tilt (0.05-0.20°/step) to collect 3D ED data from a single nano-sized crystal. Although the 3D reciprocal lattice clearly showed diffuse streaks, indicating the presence of disorder, the average structure of IM-18 could be solved using direct methods. Characterization of the disorder using HRTEM proved difficult, because germanosilicates are sensitive to radiation damage. Therefore, we have developed a method for structure projection reconstruction from a through-focus series of HRTEM images acquired with a constant step of defocus changes, implemented in the program QFocus [3]. The structure projection reconstruction method is ideal for beam sensitive materials, because it allows fast data collection without the need of manually optimizing the defocus. The contrast of the reconstructed HRTEM image is greatly improved and the image can be directly interpreted in terms of structure projection. Several through-focus series of 12 HRTEM images with a defocus step of 85.3Å were taken along the b-axis of IM-18, and the structure projections were reconstructed using QFocus (Fig. 1C). By combining this information with the RED data, we were able to understand the structure and disorder of IM-18 and to refine its structure against the synchrotron XRPD data. The crystal structure of IM-18 is monoclinic (P2/m) with a = 10.509(5) Å, b = 14.943(5) Å, c = 17.774(9) Å, β = 107.29(6)° (Fig. ...