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Boiko DA, Kashin AS, Sorokin VR, Agaev YV, Zaytsev RG, Ananikov VP. Analyzing ionic liquid systems using real-time electron microscopy and a computational framework combining deep learning and classic computer vision techniques. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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2
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Pontoni D, DiMichiel M, Deutsch M. Binary mixtures of homologous room-temperature ionic liquids: Temperature and composition evolution of the nanoscale structure. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116587] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Deutsch M, Magnussen OM, Haddad J, Pontoni D, Murphy BM, Ocko BM. Comment on "Bi-layering at ionic liquid surfaces: a sum - frequency generation vibrational spectroscopy - and molecular dynamics simulation-based study" by T. Iwahashi, T. Ishiyama, Y. Sakai, A. Morita, D. Kim and Y. Ouchi, Phys. Chem. Chem. Phys., 2020, 22, 12565. Phys Chem Chem Phys 2021; 23:5020-5027. [PMID: 33595568 DOI: 10.1039/d0cp04882h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This Comment raises several questions concerning the surface structure concluded in the paper referenced in the title. Specifically, that paper ignores previous experiments and simulations which demonstrate for the same ionic liquids depth-decaying, multilayered surface-normal density profiles rather than the claimed molecular mono- or bi-layers. We demonstrate that the claimed structure does not reproduce the measured X-ray reflectivity, which probes directly the surface-normal density profile. The measured reflectivities are found, however, to be well-reproduced by a multilayered density model. These results, and previous experimental and simulation results, cast severe doubt on the validity of the surface structure claimed in the paper referenced in the title.
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Affiliation(s)
- Moshe Deutsch
- Physics Department and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel.
| | - Olaf M Magnussen
- Institute for Experimental and Applied Physics and Ruprecht-Haensel Laboratory, Kiel University, 24118 Kiel, Germany
| | - Julia Haddad
- Physics Department and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel.
| | - Diego Pontoni
- Partnership for Soft Condensed Matter (PSCM), ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Bridget M Murphy
- Institute for Experimental and Applied Physics and Ruprecht-Haensel Laboratory, Kiel University, 24118 Kiel, Germany
| | - Benjamin M Ocko
- NSLS-II, Brookhaven National Laboratory, Upton, New York 11973, USA
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4
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Pontoni D, DiMichiel M, Deutsch M. Nanoscale Structure in Short‐Chain Ionic Liquids. Chemphyschem 2020; 21:1887-1897. [DOI: 10.1002/cphc.202000548] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Indexed: 02/03/2023]
Affiliation(s)
- Diego Pontoni
- Partnership for Soft Condensed Matter (PSCM) ESRF – The European Synchrotron 71 Avenue des Martyrs 38043 Grenoble France
| | - Marco DiMichiel
- ESRF – The European Synchrotron 71 Avenue des Martyrs 38043 Grenoble France
| | - Moshe Deutsch
- Physics Dept. & Institute of Nanotechnology and Advanced Materials Bar-Ilan University Ramat Gan Israel
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5
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Pontoni D, DiMichiel M, Deutsch M. Temperature evolution of the bulk nano-structure in a homologous series of room temperature ionic liquids. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112280] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Sohani A, Zamani Pedram M, Hoseinzadeh S. Determination of Hildebrand solubility parameter of pure 1-alkanols up to high pressures. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111847] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Nebgen BT, Magurudeniya HD, Kwock KWC, Ringstrand BS, Ahmed T, Seifert S, Zhu JX, Tretiak S, Firestone MA. Design principles from multiscale simulations to predict nanostructure in self-assembling ionic liquids. Faraday Discuss 2017; 206:159-181. [PMID: 28956588 DOI: 10.1039/c7fd00154a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Molecular dynamics simulations (up to the nanoscale) were performed on the 3-methyl-1-pentylimidazolium ionic liquid cation paired with three anions; chloride, nitrate, and thiocyanate as aqueous mixtures, using the effective fragment potential (EFP) method, a computationally inexpensive way of modeling intermolecular interactions. The simulations provided insight (preferred geometries, radial distribution functions and theoretical proton NMR resonances) into the interactions within the ionic domain and are validated against 1H NMR spectroscopy and small- and wide-angle X-ray scattering experiments on 1-decyl-3-methylimidazolium. Ionic liquids containing thiocyanate typically resist gelation and form poorly ordered lamellar structures upon mixing with water. Conversely, chloride, a strongly coordinating anion, normally forms strong physical gels and produces well-ordered nanostructures adopting a variety of structural motifs over a very wide range of water compositions. Nitrate is intermediate in character, whereby upon dispersal in water it displays a range of viscosities and self-assembles into nanostructures with considerable variability in the fidelity of ordering and symmetry, as a function of water content in the binary mixtures. The observed changes in the macro and nanoscale characteristics were directly correlated to ionic domain structures and intermolecular interactions as theoretically predicted by the analysis of MD trajectories and calculated RDFs. Specifically, both chloride and nitrate are positioned in the plane of the cation. Anion to cation proximity is dependent on water content. Thiocyanate is more susceptible to water insertion into the second solvent shell. Experimental 1H NMR chemical shifts monitor the site-specific competition dependence with water content in the binary mixtures. Thiocyanate preferentially sits above and below the aromatic ring plane, a state disallowing interaction with the protons on the imidazolium ring.
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Affiliation(s)
- Benjamin T Nebgen
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545. and Theoretical Division, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545
| | - Harsha D Magurudeniya
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545.
| | - Kevin W C Kwock
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545.
| | - Bryan S Ringstrand
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545.
| | - Towfiq Ahmed
- Theoretical Division, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545
| | - Sönke Seifert
- X-ray Sciences Division, Argonne National Laboratory, Lemont, IL, USA 60439
| | - Jian-Xin Zhu
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545. and Theoretical Division, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545
| | - Sergei Tretiak
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545. and Theoretical Division, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545
| | - Millicent A Firestone
- Materials Physics & Applications, Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, USA 87545.
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8
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Medina JS, Arismendi-Arrieta DJ, Alemán JV, Prosmiti R. Developing time to frequency-domain descriptors for relaxation processes: Local trends. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Pontoni D, Haddad J, Di Michiel M, Deutsch M. Self-segregated nanostructure in room temperature ionic liquids. SOFT MATTER 2017; 13:6947-6955. [PMID: 28849840 DOI: 10.1039/c7sm01464c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The nanosegregated bulk structure, and its evolution with the cation's alkyl length n, are studied by X-ray scattering for an unprecedentedly broad homologous series of a model room-temperature ionic liquid, [CnMIM][NTf2] (n = 4-22). A tri-periodic local structure is found, with the lateral periodicities, dII and dIII independent of n, and a longitudinal one, dI, linearly increasing with n. The results are consistent with a local structure comprising alternating layers of polar headgroups and apolar, interdigitated, partly overlapping, cations' alkyl tails, of an average macroscopic mass density close to that of liquid alkanes. A slope decrease in the linear dI(n) suggests a change from a lower to a higher rate of increase with n of chain overlap for n ≥ 12. The order decay lengths of the layering, and of the lateral chain packing, increase with n, as expected from the increasing van der Waals interaction's domination of the structure. The headgroups' lateral packing decay length decreases with n, due to increasing frustration between the longer lateral periodicity preferred by the headgroups, and the shorter lateral periodicity preferred by the chains. A comparison of the bulk and surface structures highlights the surface's ordering effect, which, however, does not induce here a surface phase different from the bulk, as it does in liquid crystals and liquid alkanes.
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Affiliation(s)
- Diego Pontoni
- ESRF - The European Synchrotron and Partnership for Soft Condensed Matter (PSCM), 71 Avenue des Martyrs, 38000 Grenoble, France
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10
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Micellization behaviour of surface active N-alkyl pyridinium dodecylsulphate task-specific ionic liquids in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.083] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Weiss H, Mars J, Li H, Kircher G, Ivanova O, Feoktystov A, Soltwedel O, Bier M, Mezger M. Mesoscopic Correlation Functions in Heterogeneous Ionic Liquids. J Phys Chem B 2017; 121:620-629. [PMID: 28001074 DOI: 10.1021/acs.jpcb.6b11220] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A common feature of ionic liquids composed of cations with long aliphatic side chains is structural heterogeneities on the nanometer length scale. This so-called microphase separation arises from the clustering of aliphatic moieties. The temperature dependence of the liquid bulk structure was studied by small-angle X-ray and neutron scattering for a set of methylimidazolium ([C18C1im]+, [C22C1im]+) based ionic liquids with tris(pentafluoroethyl)trifluorophosphate ([FAP]-), bis(trifluoromethylsulfonyl)imide ([NTf2]-), and bis(nonafluorobutylsulfonyl)imide ([NNf2]-) anions. The experimental data is quantitatively analyzed using a generalized Teubner-Strey model. Discussion of the resulting periodicity d and correlation length ξ shows that the structural heterogeneities are governed by the interplay between the alkyl chain length, the geometry of the anion, and entropic effects. Connections between the mesoscopic correlation functions, density, and entropy of fusion are discussed in comparison to alcohols. The observed dependencies allow predictions on the mesoscopic correlation functions based on macroscopic bulk quantities.
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Affiliation(s)
- Henning Weiss
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Julian Mars
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany.,Institute of Physics, Johannes Gutenberg University Mainz , 55128 Mainz, Germany
| | - Hailong Li
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Gunnar Kircher
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Oxana Ivanova
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH , Lichtenbergstr. 1, 85748 Garching, Germany
| | - Artem Feoktystov
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH , Lichtenbergstr. 1, 85748 Garching, Germany
| | - Olaf Soltwedel
- Max Planck Institute for Solid State Research , Outstation at Heinz Maier-Leibnitz Zentrum, Lichtenbergstr. 1, 85747 Garching, Germany
| | - Markus Bier
- Max Planck Institute for Intelligent Systems , Heisenbergstr. 3, 70569 Stuttgart, Germany.,Institute for Theoretical Physics IV, University of Stuttgart , Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Markus Mezger
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany.,Institute of Physics, Johannes Gutenberg University Mainz , 55128 Mainz, Germany
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12
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Mariani A, Caminiti R, Gontrani L. Water and hexane in an ionic liquid: computational evidence of association under high pressure. Phys Chem Chem Phys 2017; 19:8661-8666. [DOI: 10.1039/c6cp08450h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dissolving water and hexane in an ionic liquid, our simulations clearly show association between them at high pressures.
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Affiliation(s)
- A. Mariani
- Department of Chemistry
- “La Sapienza” University of Rome
- 00185 Rome
- Italy
| | - R. Caminiti
- Department of Chemistry
- “La Sapienza” University of Rome
- 00185 Rome
- Italy
- Centro di Ricerca per le Nanotecnologie Applicate all’Ingegneria
| | - L. Gontrani
- Department of Chemistry
- “La Sapienza” University of Rome
- 00185 Rome
- Italy
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13
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A joint experimental and computational study on ethylammonium nitrate-ethylene glycol 1:1 mixture. Structural, kinetic, dynamic and spectroscopic properties. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.08.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Russina O, Triolo A. Ionic Liquids and Neutron Scattering. NEUTRON SCATTERING - APPLICATIONS IN BIOLOGY, CHEMISTRY, AND MATERIALS SCIENCE 2017. [DOI: 10.1016/b978-0-12-805324-9.00004-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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15
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Schaumann J, Loor M, Ünal D, Mudring A, Heimann S, Hagemann U, Schulz S, Maculewicz F, Schierning G. Improving the zT value of thermoelectrics by nanostructuring: tuning the nanoparticle morphology of Sb2Te3by using ionic liquids. Dalton Trans 2017; 46:656-668. [DOI: 10.1039/c6dt04323b] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Morphology and thermoelectric properties of Sb2Te3nanoparticles synthesized in ionic liquids are controlled by the cation and anion.
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Affiliation(s)
- Julian Schaumann
- Inorganic Chemistry III – Materials Synthesis and Characterization
- Ruhr-Universität Bochum
- Bochum
- Germany
- Faculty of Chemistry and Center for NanoIntegration (CENIDE)
| | - Manuel Loor
- Inorganic Chemistry III – Materials Synthesis and Characterization
- Ruhr-Universität Bochum
- Bochum
- Germany
- Faculty of Chemistry and Center for NanoIntegration (CENIDE)
| | - Derya Ünal
- Inorganic Chemistry III – Materials Synthesis and Characterization
- Ruhr-Universität Bochum
- Bochum
- Germany
| | - Anja Mudring
- Inorganic Chemistry III – Materials Synthesis and Characterization
- Ruhr-Universität Bochum
- Bochum
- Germany
- Department of Materials Science and Engineering
| | - Stefan Heimann
- Faculty of Chemistry and Center for NanoIntegration (CENIDE)
- University of Duisburg-Essen
- DE-45117 Essen
- Germany
| | - Ulrich Hagemann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN)
- NETZ
- University of Duisburg-Essen
- 47047 Duisburg
- Germany
| | - Stephan Schulz
- Faculty of Chemistry and Center for NanoIntegration (CENIDE)
- University of Duisburg-Essen
- DE-45117 Essen
- Germany
| | - Franziska Maculewicz
- Faculty of Engineering and Center for NanoIntegration (CENIDE)
- University of Duisburg-Essen
- DE-47057 Duisburg
- Germany
| | - Gabi Schierning
- Faculty of Engineering and Center for NanoIntegration (CENIDE)
- University of Duisburg-Essen
- DE-47057 Duisburg
- Germany
- Institute for Metallic Materials
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16
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Keaveney ST, Greaves TL, Kennedy DF, Harper JB. Understanding the Effect of Solvent Structure on Organic Reaction Outcomes When Using Ionic Liquid/Acetonitrile Mixtures. J Phys Chem B 2016; 120:12687-12699. [PMID: 27973829 DOI: 10.1021/acs.jpcb.6b11090] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rate constant for the reaction between hexan-1-amine and 4-methoxybenzaldehyde was determined in ionic liquids containing an imidazolium cation. The effect on the rate constant of increasing the length of the alkyl substituent on the cation was examined in a number of ionic liquid/acetonitrile mixtures. In general it was found that there was no significant effect of changing the alkyl substituent on the rate constant of this process, suggesting that any nanodomains in these mixtures do not have a significant effect on the outcome of this process. A series of small-angle X-ray scattering and wide-angle X-ray scattering experiments were performed on mixtures of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([Bmim][N(CF3SO2)2]) and acetonitrile; this work indicated that the main structural changes in the mixtures occur by about a 0.2 mole fraction of ionic liquid in the mixture (χIL). This region at which the main changes in the solvent structuring occurs corresponds to the region at which the main changes in the rate constant and activation parameters occur for SN2 and condensation reactions examined previously; this is the first time that such a correlation has been observed. To examine the ordering of the solvent about the nucleophile hexan-1-amine, WAXS experiments were performed on a number of [Bmim][N(CF3SO2)2]/acetonitrile/hexan-1-amine mixtures, where it was found that some of the patterns featured asymmetric peaks as well as additional peaks not observed in the [Bmim][N(CF3SO2)2]/acetonitrile mixtures; this suggests that the addition of hexan-1-amine to the mixture affects the bulk structure of the liquid. The SAXS/WAXS patterns of mixtures of 1-butyl-2,3-dimethylimidazolium bis(trifluoromethanesulfonyl)imide ([Bm2im][N(CF3SO2)2]) and acetonitrile were also determined, with the results suggesting that [Bm2im][N(CF3SO2)2] is more ordered than [Bmim][N(CF3SO2)2] due to an enhancement in the short-range interactions.
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Affiliation(s)
- Sinead T Keaveney
- School of Chemistry, University of New South Wales , Sydney, NSW 2052, Australia
| | - Tamar L Greaves
- School of Science, College of Science, Engineering and Health, RMIT University , Melbourne, VIC 3001, Australia
| | | | - Jason B Harper
- School of Chemistry, University of New South Wales , Sydney, NSW 2052, Australia
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Lo Celso F, Aoun B, Triolo A, Russina O. Liquid structure of dibutyl sulfoxide. Phys Chem Chem Phys 2016; 18:15980-7. [DOI: 10.1039/c6cp02335e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Liquid DBSO shows mesoscopic polar/apolar alternation. Dipole–dipole interactions are responsible for correlations between DBSO molecules that do not interact through hydrogen bonding.
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Affiliation(s)
| | - Bachir Aoun
- Advanced Photon Source
- Argonne National Laboratory
- Argonne
- USA
| | - Alessandro Triolo
- Laboratorio Liquidi Ionici
- Istituto Struttura della Materia
- CNR
- Rome
- Italy
| | - Olga Russina
- Department of Chemistry
- Sapienza University
- P. le Aldo Moro 5 Rome
- Italy
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18
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Mariani A, Russina O, Caminiti R, Triolo A. Structural organization in a methanol:ethylammonium nitrate (1:4) mixture: A joint X-ray/Neutron diffraction and computational study. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.10.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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