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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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Cussen, Edmund
Technological University Dublin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2017Insulating to metallic behaviour in the cation ordered perovskites Ba2Nd1−xFexMoO6citations
- 2016Microwave-assisted syntheis of highly crystalline, multifunctional iron oxide nanocomposites for imaging applicationscitations
- 2016Scalable continuous solvothermal synthesis of metal organic framework (MOF-5) crystalscitations
- 2015Structural and magnetic study of Yb3+ in the perovskites Sr2YbMO6 (M = Nb, Ta, Sb)citations
- 2014Structural and magnetic study of order−disorder behavior in the double perovskites Ba2Nd1−xMnxMoO6citations
- 2013Effect of synthesis conditions on formation pathways of metal organic framework (MOF-5) Crystalscitations
- 2013A neutron diffraction study of structural distortion and magnetic ordering in the cation-ordered perovskites Ba2Nd1−xYxMoO6citations
- 2010Spontaneous formation of crystalline lithium molybdate from solid reagents at room temperaturecitations
- 2010Lithium Ion conduction in oxidescitations
- 2008The structure of the lithium-rich garnets li6la2m2o12 and li6.4sr1.4la1.6m2o12 (m = sb, ta)citations
- 2008Switching on fast lithium ion conductivity in garnetscitations
- 2007Structural and magnetic study of the cation-ordered perovskites Ba2−xSrxErMoO6citations
- 2006Magnetic order arising from structural distortion: the structure and magnetic properties of Ba2LnMoO6citations
- 2005The first layered analogue of Sr2FeMoO6; the structure and electronic properties of Sr4FeMoO8citations
- 2004Adsorption of gases and vapors on nanoporous Ni-2(4,4 '-bipyridine)(3)(NO3)(4) metal-organic framework materials templated with methanol and ethanol: Structural effects in adsorption kineticscitations
- 2002Flexible sorption and transformation behavior in a microporous metal-organic frameworkcitations
- 2001Adsorption dynamics of gases and vapors on the nanoporous metal organic framework material Ni-2(4,4 '-bipyridine)(3)(NO3)(4): guest modification of host sorption behaviorcitations
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article
Adsorption dynamics of gases and vapors on the nanoporous metal organic framework material Ni-2(4,4 '-bipyridine)(3)(NO3)(4): guest modification of host sorption behavior
Abstract
This study combines measurements of the thermodynamics and kinetics of guest sorption with powder X-ray diffraction measurements of the nanoporous metal organic framework adsorbent (host) at different adsorptive (guest) loadings. The adsorption characteristics of nitrogen, argon, carbon dioxide, nitrous oxide and ethanol and methanol vapors on Ni2(4,4'-bipyridine)3(NO3)4 were studied over a range of temperatures as a function of pressure. Isotherm steps were observed for both carbon dioxide and nitrous oxide adsorption at approximately 10-20% of the total pore volume and at approximately 70% of total pore volume for methanol adsorption. The adsorption kinetics obey a linear driving force (LDF) mass transfer model for adsorption at low surface coverage. At high surface coverage, both methanol and ethanol adsorption follow a combined barrier resistance/diffusion model. The rates of adsorption in the region of both the carbon dioxide and methanol isotherm steps were significantly slower than those observed either before or after the step. X-ray diffraction studies at various methanol loadings showed that the host structure disordered initially but underwent a structural change in the region of the isotherm step. These isotherm steps are ascribed to discrete structural changes in the host adsorbent that are induced by adsorption on different sites. Isotherm steps were not observed for ethanol adsorption, which followed a Langmuir isotherm. Previous X-ray crystallography studies have shown that all the sites are equivalent for ethanol adsorption on Ni2(4,4'-bipyridine)3(NO3)4, with the host structure undergoing a scissoring motion and the space group remaining unchanged during adsorption. The activation energies and preexponential factors for methanol and ethanol adsorption were calculated for each pressure increment at which the linear driving force model was obeyed. There was a good correlation between activation energy and ln(preexponential factor), indicating a compensation effect. The results are discussed in terms of reversible adsorbate/adsorbent (guest/host) structural changes and interactions and the adsorption mechanism. The paper contains the first evidence of specific interactions between guests and functional groups leading to structural change in flexible porous coordination polymer frameworks.