| 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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Duren, Tina
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2019Triphasic Nature of Polymers of Intrinsic Microporosity Induces Storage and Catalysis Effects in Hydrogen and Oxygen Reactivity at Electrode Surfacescitations
- 2018Tuning the Mechanical Response of Metal−Organic Frameworks by Defect Engineeringcitations
- 2015Metal-organic frameworks from divalent metals and 1,4-benzenedicarboxylate with bidentate pyridine-N-oxide co-ligandscitations
- 2014Polymorphism of metal-organic frameworkscitations
- 2014Stabilization of scandium terephthalate MOFs against reversible amorphization and structural phase transition by guest uptake at extreme pressurecitations
- 2013Elucidating the breathing of the metal-organic framework MIL-53(Sc) with ab initio molecular dynamics simulations and in situ X-ray Powder Diffraction Experimentscitations
- 2006Synthesis of MIL-102, a chromium carboxylate metal-organic framework, with gas sorption analysiscitations
- 2005Adsorption fundamentals in metal-organic frameworks from molecular modeling
- 2004Molecular modelling of adsorption in novel nanoporous metal-organic materialscitations
- 2004Assessment of isoreticular metal-organic frameworks for adsorption separationscitations
- 2001Molecular modeling of adsorption in carbon nanotubes
Places of action
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article
Stabilization of scandium terephthalate MOFs against reversible amorphization and structural phase transition by guest uptake at extreme pressure
Abstract
<p>Previous high-pressure experiments have shown that pressure-transmitting fluids composed of small molecules can be forced inside the pores of metal organic framework materials, where they can cause phase transitions and amorphization and can even induce porosity in conventionally nonporous materials. Here we report a combined high-pressure diffraction and computational study of the structural response to methanol uptake at high pressure on a scandium terephthalate MOF (Sc<sub>2</sub>BDC<sub>3</sub>, BDC = 1,4-benzenedicarboxylate) and its nitro-functionalized derivative (Sc <sub>2</sub>(NO<sub>2</sub>-BDC)<sub>3</sub>) and compare it to direct compression behavior in a nonpenetrative hydrostatic fluid, Fluorinert-77. In Fluorinert-77, Sc<sub>2</sub>BDC<sub>3</sub> displays amorphization above 0.1 GPa, reversible upon pressure release, whereas Sc<sub>2</sub>(NO <sub>2</sub>-BDC)<sub>3</sub> undergoes a phase transition (C2/c to Fdd2) to a denser but topologically identical polymorph. In the presence of methanol, the reversible amorphization of Sc<sub>2</sub>BDC<sub>3</sub> and the displacive phase transition of the nitro-form are completely inhibited (at least up to 3 GPa). Upon uptake of methanol on Sc<sub>2</sub>BDC<sub>3</sub>, the methanol molecules are found by diffraction to occupy two sites, with preferential relative filling of one site compared to the other: grand canonical Monte Carlo simulations support these experimental observations, and molecular dynamics simulations reveal the likely orientations of the methanol molecules, which are controlled at least in part by H-bonding interactions between guests. As well as revealing the atomistic origin of the stabilization of these MOFs against nonpenetrative hydrostatic fluids at high pressure, this study demonstrates a novel high-pressure approach to study adsorption within a porous framework as a function of increasing guest content, and so to determine the most energetically favorable adsorption sites.</p>