In silico design of a new Zn-triazole based metal-organic framework for CO2 and H2O adsorption
| Autor: | Ivana S. Djordjević, Rahma Dahmani, S. Ben Yaghlane, Gilberte Chambaud, Salima Boughdiri, Majdi Hochlaf, Sonja Grubišić |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Hydrogen bonding interactions
Materials science Water adsorption Base (chemistry) Grand canonical Monte Carlo simulation General Physics and Astronomy 010402 general chemistry 01 natural sciences Hydrogen bonds Adsorption 0103 physical sciences Classical force fields Molecule Porous materials GCMC simulation Zinc compounds Physical and Theoretical Chemistry Porosity Metal-Organic Frameworks chemistry.chemical_classification Microscopic levels 010304 chemical physics Hydrogen bond Adsorption isotherms Organic polymers Rational design Organometallics Monte Carlo methods Molecules Structural parameter Electrostatics 0104 chemical sciences chemistry Carbon dioxide Chemical physics Metal-organic framework Molecular simulations Hydrogen |
| Zdroj: | Journal of Chemical Physics |
| Popis: | In search for future good adsorbents for CO2 capture, a nitrogen-rich triazole-type Metal-Organic Framework (MOF) is proposed based on the rational design and theoretical molecular simulations. The structure of the proposed MOF, named Zinc Triazolate based Framework (ZTF), is obtained by replacing the amine-organic linker of MAF-66 by a triazole, and its structural parameters are deduced. We used grand-canonical Monte Carlo (GCMC) simulations based on generic classical force fields to correctly predict the adsorption isotherms of CO2 and H2O. For water adsorption in MAF-66 and ZTF, simulations revealed that the strong hydrogen bonding interactions of water with the N atoms of triazole rings of the frameworks are the main driving forces for the high adsorption uptake of water. We also show that the proposed ZTF porous material exhibits exceptional high CO2 uptake capacity at low pressure, better than MAF-66. Moreover, the nature of the interactions between CO2 and the MAF-66 and ZTF surface cavities was examined at the microscopic level. Computations show that the interactions occur at two different sites, consisting of Lewis acid-Lewis base interactions and hydrogen bonding, together with obvious electrostatic interactions. In addition, we investigated the influence of the presence of H2O molecules on the CO2 adsorption on the ZTF MOF. GCMC simulations reveal that the addition of H2O molecules leads to an enhancement of the CO2 adsorption at very low pressures but a reduction of this CO2 adsorption at higher pressures. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in J. Chem. Phys. 154, 024303 (2021); doi: [https://dx.doi.org/10.1063/5.0037594] Supplementary material: [https://cer.ihtm.bg.ac.rs/handle/123456789/4512] |
| Databáze: | OpenAIRE |
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