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Rivera-Pousa A, Lois-Cuns R, Otero-Lema M, Montes-Campos H, Méndez-Morales T, Varela LM. Size Matters: A Computational Study of Hydrogen Absorption in Ionic Liquids. J Chem Inf Model 2024; 64:164-177. [PMID: 38126302 PMCID: PMC10777413 DOI: 10.1021/acs.jcim.3c01688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/25/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023]
Abstract
We combined both density functional theory and classical molecular dynamics simulations to investigate the molecular mechanisms governing hydrogen solvation in a total of 12 ionic liquids. Overall, the analysis of the structural properties under high temperature and pressure conditions revealed weak interactions between hydrogen and the ionic liquids, with a slight preference of this gas to be placed at the apolar domains. Interestingly, those ionic liquids comprising nitrate anions allow the accommodation of hydrogen molecules also in the polar areas. The study of the hydrogen velocity autocorrelation functions supports this observation. In addition, the structure of all of the tested ionic liquids was almost insensitive to the addition of hydrogen, so the available free volume and cavity formation are presumably the most important factors affecting solubility.
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Affiliation(s)
- Alejandro Rivera-Pousa
- Grupo
de Nanomateriais, Fotónica e Materia Branda, Departamento de
Física de Partículas, Universidade
de Santiago de Compostela, Campus Vida s/n, Santiago
de Compostela E-15782, Spain
- Instituto
de Materiais (iMATUS), Universidade de Santiago
de Compostela, Avenida
do Mestre Mateo 25, Santiago de Compostela E-15782, Spain
| | - Raúl Lois-Cuns
- Grupo
de Nanomateriais, Fotónica e Materia Branda, Departamento de
Física de Partículas, Universidade
de Santiago de Compostela, Campus Vida s/n, Santiago
de Compostela E-15782, Spain
- Instituto
de Materiais (iMATUS), Universidade de Santiago
de Compostela, Avenida
do Mestre Mateo 25, Santiago de Compostela E-15782, Spain
| | - Martín Otero-Lema
- Grupo
de Nanomateriais, Fotónica e Materia Branda, Departamento de
Física de Partículas, Universidade
de Santiago de Compostela, Campus Vida s/n, Santiago
de Compostela E-15782, Spain
- Instituto
de Materiais (iMATUS), Universidade de Santiago
de Compostela, Avenida
do Mestre Mateo 25, Santiago de Compostela E-15782, Spain
| | - Hadrián Montes-Campos
- Grupo
de Nanomateriais, Fotónica e Materia Branda, Departamento de
Física de Partículas, Universidade
de Santiago de Compostela, Campus Vida s/n, Santiago
de Compostela E-15782, Spain
- Instituto
de Materiais (iMATUS), Universidade de Santiago
de Compostela, Avenida
do Mestre Mateo 25, Santiago de Compostela E-15782, Spain
- CIQUP,
Institute of Molecular Sciences (IMS)—Departamento de Química
e Bioquímica, Faculdade de Ciências
da Universidade do Porto, Rua Campo Alegre, Porto 4169-007, Portugal
| | - Trinidad Méndez-Morales
- Grupo
de Nanomateriais, Fotónica e Materia Branda, Departamento de
Física de Partículas, Universidade
de Santiago de Compostela, Campus Vida s/n, Santiago
de Compostela E-15782, Spain
- Instituto
de Materiais (iMATUS), Universidade de Santiago
de Compostela, Avenida
do Mestre Mateo 25, Santiago de Compostela E-15782, Spain
| | - Luis Miguel Varela
- Grupo
de Nanomateriais, Fotónica e Materia Branda, Departamento de
Física de Partículas, Universidade
de Santiago de Compostela, Campus Vida s/n, Santiago
de Compostela E-15782, Spain
- Instituto
de Materiais (iMATUS), Universidade de Santiago
de Compostela, Avenida
do Mestre Mateo 25, Santiago de Compostela E-15782, Spain
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Experimental and Computational Evaluation of 1,2,4-Triazolium-Based Ionic Liquids for Carbon Dioxide Capture. SEPARATIONS 2023. [DOI: 10.3390/separations10030192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
Utilization of ionic liquids (ILs) for carbon dioxide (CO2) capture is continuously growing, and further understanding of the factors that influence its solubility (notably for new ILs) is crucial. Herein, CO2 absorption of two 1,2,4-triazolium-based ILs was compared with imidazolium-based Ils of different anions, namely bis(trifluoromethylsulfonyl)imide, tetrafluoroborate, and glycinate. The CO2 absorption capacity was determined using an isochoric saturation method and compared with predicted solubility employing COnductor-like Screening Model for Real Solvents (COSMO-RS). To gain an understanding of the effects of cations and anions of the ILs on the CO2 solubility, the molecular orbitals energy levels were calculated using TURBOMOLE. Triazolium-based ILs exhibit higher absorption capacity when compared to imidazolium-based ILs for the same anions. The results also showed that the anions’ energy levels are more determinant towards solubility than the cations’ energy levels, which can be explained by the higher tendency of CO2 to accept electrons than to donate them.
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Zhao H, Baker GA. Functionalized Ionic Liquids for CO 2 Capture under Ambient Pressure. GREEN CHEMISTRY LETTERS AND REVIEWS 2022; 16:2149280. [PMID: 37304337 PMCID: PMC10254919 DOI: 10.1080/17518253.2022.2149280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 11/15/2022] [Indexed: 06/13/2023]
Abstract
Ionic liquids (ILs) have been widely explored as alternative solvents for carbon dioxide (CO2) capture and utilization. However, most of these processes are under pressures significantly higher than atmospheric level, which not only levies additional equipment and operation costs, but also makes the large-scale CO2 capture and conversion less practical. In this study, we rationally designed glycol ether-functionalized imidazolium, phosphonium and ammonium ILs containing acetate (OAc-) or Tf2N- anions, and found these task-specific ILs could solubilize up to 0.55 mol CO2 per mole of IL (or 5.9 wt% CO2) at room temperature and atmospheric pressure. Although acetate anions enabled a better capture of CO2, Tf2N- anions are more compatible with alcohol dehydrogenase (ADH), which is a key enzyme involved in the cascade enzymatic conversion of CO2 to methanol. Our promising results indicate the possibility of CO2 capture under ambient pressure and its enzymatic conversion to valuable commodity.
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Affiliation(s)
- Hua Zhao
- Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, USA
| | - Gary A. Baker
- Department of Chemistry, University of Missouri, Columbia, MO 65211, USA
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Shelepova EA, Medvedev NN. Connection between empty volume and solubility of light gases in [CnMIM][NTf2] ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Utilization of CO2-Available Organocatalysts for Reactions with Industrially Important Epoxides. Catalysts 2022. [DOI: 10.3390/catal12030298] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Recent knowledge in chemistry has enabled the material utilization of greenhouse gas (CO2) for the production of organic carbonates using mild reaction conditions. Organic carbonates, especially cyclic carbonates, are applicable as green solvents, electrolytes in batteries, feedstock for fine chemicals and monomers for polycarbonate production. This review summarizes new developments in the ring opening of epoxides with subsequent CO2-based formation of cyclic carbonates. The review highlights recent and major developments for sustainable CO2 conversion from 2000 to the end of 2021 abstracted by Web of Science. The syntheses of epoxides, especially from bio-based raw materials, will be summarized, such as the types of raw material (vegetable oils or their esters) and the reaction conditions. The aim of this review is also to summarize and to compare the types of homogeneous non-metallic catalysts. The three reaction mechanisms for cyclic carbonate formation are presented, namely activation of the epoxide ring, CO2 activation and dual activation. Usually most effective catalysts described in the literature consist of powerful sources of nucleophile such as onium salt, of hydrogen bond donors and of tertiary amines used to combine epoxide activation for facile epoxide ring opening and CO2 activation for the subsequent smooth addition reaction and ring closure. The most active catalytic systems are capable of activating even internal epoxides such as epoxidized unsaturated fatty acid derivatives for the cycloaddition of CO2 under relatively mild conditions. In case of terminal epoxides such as epichlorohydrin, the effective utilization of diluted sources of CO2 such as flue gas is possible using the most active organocatalysts even at ambient pressure.
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Elucidation of the Roles of Ionic Liquid in CO 2 Electrochemical Reduction to Value-Added Chemicals and Fuels. Molecules 2021; 26:molecules26226962. [PMID: 34834053 PMCID: PMC8624163 DOI: 10.3390/molecules26226962] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/06/2021] [Accepted: 11/15/2021] [Indexed: 11/16/2022] Open
Abstract
The electrochemical reduction of carbon dioxide (CO2ER) is amongst one the most promising technologies to reduce greenhouse gas emissions since carbon dioxide (CO2) can be converted to value-added products. Moreover, the possibility of using a renewable source of energy makes this process environmentally compelling. CO2ER in ionic liquids (ILs) has recently attracted attention due to its unique properties in reducing overpotential and raising faradaic efficiency. The current literature on CO2ER mainly reports on the effect of structures, physical and chemical interactions, acidity, and the electrode–electrolyte interface region on the reaction mechanism. However, in this work, new insights are presented for the CO2ER reaction mechanism that are based on the molecular interactions of the ILs and their physicochemical properties. This new insight will open possibilities for the utilization of new types of ionic liquids. Additionally, the roles of anions, cations, and the electrodes in the CO2ER reactions are also reviewed.
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Interactions of CO2 with the homologous series of СnMIMBF4 ionic liquids studied in situ ATR-FTIR spectroscopy: spectral characteristics, thermodynamic parameters and their correlation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113694] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Soares TA, Wahab HA. Outlook on the Development and Application of Molecular Simulations in Latin America. J Chem Inf Model 2020; 60:435-438. [PMID: 32009389 DOI: 10.1021/acs.jcim.0c00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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