1
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Li K, Wang Y, Wang C, Huo F, Zhang S, He H. Fluorine Domains Induced Ultrahigh Nitrogen Solubility in Ionic Liquids. J Am Chem Soc 2024. [PMID: 39094117 DOI: 10.1021/jacs.4c06784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Fluorinated ionic liquids (ILs) are well-known as electrolytes in the nitrogen (N2) electroreduction reaction due to their exceptional gas solubility. However, the influence of fluorinated functional group on N2 solvation and solubility enhancement remains unclear. Massive molecular dynamics simulations and free energy perturbation methods are conducted to investigate the N2 solubility in 11 traditional and 9 fluorinated ILs. It shows that the fluorinated IL of 1-Ethyl-3-methylimidazolium tris(pentafluoroethyl) trifluorophosphate ([Emim]FAP) exhibits ultrahigh solubility, 4.844 × 10-3, approximately 118 times higher than that of traditional IL 1-Ethyl-3-methylimidazolium nitrate ([Emim]NO3). Moreover, fluorinated ILs with more than 10 C-F bonds possess higher N2 solubility than others and show an exothermic nature during solvation. As the C-F bonds number in ILs decreases, the N2 solubility decreases significantly and displays the opposite endothermic behavior. To understand the ultrahigh N2 solubility in fluorinated ILs, we propose a concept of fluorine densification energy (FDE), referring to the average strength of interaction between atoms per unit volume in ILs with fluorine domains, demonstrating a linear relationship with C-F bonds. Physically, lower FDE results in lower N2-anion pair dissociation energy and higher free volume, finally enhancing the N2 solubility. Consequently, medium to long alkyl fluorine tails within a polar environment defines a distinct fluorine domain, emphasizing FDE's role in enhancing N2 solubility. Overall, these quantitative results will not only deepen the understanding of N2 solvation in ILs but may also shed light on the rational design of IL-based high-performance N2 capture and conversion technologies.
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Affiliation(s)
- Kun Li
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanlei Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Department of Chemistry, School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China
| | - Chenlu Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Feng Huo
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Suojiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Hongyan He
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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2
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Abstract
Experimental measurements of interactions in ionic liquids and concentrated electrolytes over the past decade or so have revealed simultaneous monotonic and oscillatory decay modes. These observations have been hard to interpret using classical theories, which typically allow for just one electrostatic decay mode in electrolytes. Meanwhile, substantial progress in the theoretical description of dielectric response and ion correlations in electrolytes has illuminated the deep connection between density and charge correlations and the multiplicity of decay modes characterising a liquid electrolyte. The challenge in front of us is to build connections between the theoretical expressions for a pair of correlation functions and the directly measured free energy of interaction between macroscopic surfaces in experiments. Towards this aim, we here present measurements and analysis of the interactions between macroscopic bodies across a fluid mixture of two ionic liquids of widely diverging ionic size. The measured oscillatory interaction forces in the liquid mixtures are significantly more complex than for either of the pure ionic liquids, but can be fitted to a superposition of two oscillatory and one monotonic mode with parameters matching those of the pure liquids. We discuss this empirical finding, which hints at a kind of wave mechanics for interactions in liquid matter.
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Affiliation(s)
- Timothy S Groves
- Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford, UK.
| | - Susan Perkin
- Physical and Theoretical Chemistry Laboratory, University of Oxford, Oxford, UK.
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3
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Borah B, Acharya GR, Grajeda D, Emerson MS, Harris MA, Milinda Abeykoon AM, Sangoro J, Baker GA, Nieuwkoop AJ, Margulis CJ. Do Ionic Liquids Slow Down in Stages? J Am Chem Soc 2023; 145:25518-25522. [PMID: 37963184 PMCID: PMC10691361 DOI: 10.1021/jacs.3c08639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/16/2023]
Abstract
High impact recent articles have reported on the existence of a liquid-liquid (L-L) phase transition as a function of both pressure and temperature in ionic liquids (ILs) containing the popular trihexyltetradecylphosphonium cation (P666,14+), sometimes referred to as the "universal liquifier". The work presented here reports on the structural-dynamic pathway from liquid to glass of the most well-studied IL comprising the P666,14+ cation. We present experimental and computational evidence that, on cooling, the path from the room-temperature liquid to the glass state is one of separate structural-dynamic changes. The first stage involves the slowdown of the charge network, while the apolar subcomponent is fully mobile. A second, separate stage entails the slowdown of the apolar domain. Whereas it is possible that these processes may be related to the liquid-liquid and glass transitions, more research is needed to establish this conclusively.
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Affiliation(s)
- Bichitra Borah
- Department
of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Gobin Raj Acharya
- Department
of Chemistry and Chemical Biology, Rutgers
University, Piscataway, New Jersey 08854, United States
| | - Diana Grajeda
- Department
of Chemistry and Chemical Biology, Rutgers
University, Piscataway, New Jersey 08854, United States
| | - Matthew S. Emerson
- Department
of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Matthew A. Harris
- Department
of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - AM Milinda Abeykoon
- National
Synchrotron Light Source II, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - Joshua Sangoro
- Department
of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
- Department
of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Gary A. Baker
- Department
of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Andrew J. Nieuwkoop
- Department
of Chemistry and Chemical Biology, Rutgers
University, Piscataway, New Jersey 08854, United States
| | - Claudio J. Margulis
- Department
of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
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4
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Theoretical insight into the structure of molten LiF, BF2, YF3 and ThF4. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-023-08780-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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5
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Emerson MS, Sharma S, Roy S, Bryantsev VS, Ivanov AS, Gakhar R, Woods ME, Gallington LC, Dai S, Maltsev DS, Margulis CJ. Complete Description of the LaCl 3–NaCl Melt Structure and the Concept of a Spacer Salt That Causes Structural Heterogeneity. J Am Chem Soc 2022; 144:21751-21762. [DOI: 10.1021/jacs.2c09987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Matthew S. Emerson
- Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Shobha Sharma
- Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Santanu Roy
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Vyacheslav S. Bryantsev
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander S. Ivanov
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ruchi Gakhar
- Pyrochemistry and Molten Salt Systems Department, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Michael E. Woods
- Pyrochemistry and Molten Salt Systems Department, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Leighanne C. Gallington
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Lemont, Illinois 60439, United States
| | - Sheng Dai
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Dmitry S. Maltsev
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Claudio J. Margulis
- Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
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6
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de Araujo Lima E Souza G, Di Pietro ME, Castiglione F, Marques Mezencio PH, Fazzio Martins Martinez P, Mariani A, Schütz HM, Passerini S, Middendorf M, Schönhoff M, Triolo A, Appetecchi GB, Mele A. Implications of Anion Structure on Physicochemical Properties of DBU-Based Protic Ionic Liquids. J Phys Chem B 2022; 126:7006-7014. [PMID: 36039977 PMCID: PMC9483912 DOI: 10.1021/acs.jpcb.2c02789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Protic ionic liquids (PILs) are potential candidates
as electrolyte
components in energy storage devices. When replacing flammable and
volatile organic solvents, PILs are expected to improve the safety
and performance of electrochemical devices. Considering their technical
application, a challenging task is the understanding of the key factors
governing their intermolecular interactions and physicochemical properties.
The present work intends to investigate the effects of the structural
features on the properties of a promising PIL based on the 1,8-diazabicyclo[5.4.0]undec-7-ene
(DBUH+) cation and the (trifluoromethanesulfonyl)(nonafluorobutanesulfonyl)imide
(IM14–) anion, the latter being a remarkably large
anion with an uneven distribution of the C–F pool between the
two sides of the sulfonylimide moieties. For comparison purposes,
the experimental investigations were extended to PILs composed of
the same DBU-based cation and the trifluoromethanesulfonate
(TFO–) or bis(trifluoromethanesulfonyl)imide
(TFSI–) anion. The combined use of multiple NMR
methods, thermal analyses, density, viscosity, and conductivity measurements
provides a deep characterization of the PILs, unveiling peculiar behaviors
in DBUH-IM14, which cannot be predicted solely on the basis of differences
between aqueous pKa values of the protonated
base and the acid (ΔpKa). Interestingly,
the thermal and electrochemical properties of DBUH-IM14 turn out to
be markedly governed by the size and asymmetric nature of the anion.
This observation highlights that the structural features of the precursors
are an important tool to tailor the PIL’s properties according
to the specific application.
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Affiliation(s)
- Giselle de Araujo Lima E Souza
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
| | - Maria Enrica Di Pietro
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
| | - Franca Castiglione
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
| | | | | | - Alessandro Mariani
- Università Politecnica Delle Marche, Piazza Roma, 22, 60121 Ancona, Italy.,Helmholtz Institute Ulm (HIU), Helmholtzstraße 11, D-89081 Ulm, Germany.,Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Hanno Maria Schütz
- Helmholtz Institute Ulm (HIU), Helmholtzstraße 11, D-89081 Ulm, Germany.,Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Stefano Passerini
- Helmholtz Institute Ulm (HIU), Helmholtzstraße 11, D-89081 Ulm, Germany.,Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Maleen Middendorf
- Institute of Physical Chemistry, University of Muenster, Corrensstrasse 28-30, 48149 Münster, Germany
| | - Monika Schönhoff
- Institute of Physical Chemistry, University of Muenster, Corrensstrasse 28-30, 48149 Münster, Germany
| | - Alessandro Triolo
- Istituto Struttura della Materia (ISM), Consiglio Nazionale delle Ricerche (CNR), via Fosso del Cavaliere 100, 00133 Rome, Italy
| | - Giovanni Battista Appetecchi
- ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development), Department for Sustainability (SSPT), Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy
| | - Andrea Mele
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
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7
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In-depth explorations on the microstructural, thermodynamic and kinetic characteristics of MgCl2-KCl eutectic salt. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Sharma S, Ivanov AS, Margulis CJ. A Brief Guide to the Structure of High-Temperature Molten Salts and Key Aspects Making Them Different from Their Low-Temperature Relatives, the Ionic Liquids. J Phys Chem B 2021; 125:6359-6372. [PMID: 34048657 PMCID: PMC8279547 DOI: 10.1021/acs.jpcb.1c01065] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/08/2021] [Indexed: 11/23/2022]
Abstract
High-temperature molten salt research is undergoing somewhat of a renaissance these days due to the apparent advantage of these systems in areas related to clean and sustainable energy harvesting and transfer. In many ways, this is a mature field with decades if not already a century of outstanding work devoted to it. Yet, much of this work was done with pioneering experimental and computational setups that lack the current day capabilities of synchrotrons and high-performance-computing systems resulting in deeply entrenched results in the literature that when carefully inspected may require revision. Yet, in other cases, access to isotopically substituted ions make those pioneering studies very unique and prohibitively expensive to carry out nowadays. There are many review articles on molten salts, some of them cited in this perspective, that are simply outstanding and we dare not try to outdo those. Instead, having worked for almost a couple of decades already on their low-temperature relatives, the ionic liquids, this is the perspective article that some of the authors would have wanted to read when embarking on their research journey on high-temperature molten salts. We hope that this will serve as a simple guide to those expanding from research on ionic liquids to molten salts and vice versa, particularly, when looking into their bulk structural features. The article does not aim at being comprehensive but instead focuses on selected topics such as short- and intermediate-range order, the constraints on force field requirements, and other details that make the high- and low-temperature ionic melts in some ways similar but in others diametrically opposite.
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Affiliation(s)
- Shobha Sharma
- Department
of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Alexander S. Ivanov
- Chemical
Sciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, United States
| | - Claudio J. Margulis
- Department
of Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States
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9
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Amith WD, Araque JC, Margulis CJ. Relationship between the Relaxation of Ionic Liquid Structural Motifs and That of the Shear Viscosity. J Phys Chem B 2021; 125:6264-6271. [PMID: 34097825 PMCID: PMC8279556 DOI: 10.1021/acs.jpcb.1c03105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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In a set of recent
articles, we have highlighted that friction
is highly inhomogeneous in a typical ionic liquid (IL) with charge
networks that are stiff and charge-depleted regions that are soft.
This has consequences not only for the dynamics of ILs but also for the transport properties of solutes
dissolved in them. In this article, we explore whether the family
of alkylimidazolium ILs coupled with bis(trifluoromethylsulfonyl)imide
(with similar Coulombic interactions but different alkyl tails), when
dynamically “equalized” by having a similar shear viscosity,
display q-dependent structural relaxation time scales
that are the same across the family. Our results show that this is
not the case, and in fact, the relaxation of in-network charge alternation
appears to be significantly affected by the presence of separate polar
and apolar domains. However, we also find that if one was to assign
weight factors to the relaxation of the structural motifs, charge
alternation always contributes about the same amount (between 62.1
and 66.3%) across systems to the running integral of the stress tensor
correlation function from which the shear viscosity is derived. Adjacency
correlations between positive and negative moieties also contribute
an identical amount if a prepeak is not present (about 38%) and a
slightly smaller amount (about 28%) when intermediate range order
exists. The prepeak only contributes about 6% to viscoelastic relaxation,
highlighting that the dynamics of the smaller scale motifs is the
most important.
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Affiliation(s)
| | - Juan C Araque
- School of Engineering, Benedictine College, Atchison, Kansas 66002, United States
| | - Claudio J Margulis
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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10
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Triolo A, Lo Celso F, Brehm M, Di Lisio V, Russina O. Liquid structure of a choline chloride-water natural deep eutectic solvent: A molecular dynamics characterization. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115750] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Li Z, Robertson LA, Shkrob IA, Smith KC, Cheng L, Zhang L, Moore JS, Z Y. Realistic Ion Dynamics through Charge Renormalization in Nonaqueous Electrolytes. J Phys Chem B 2020; 124:3214-3220. [PMID: 32207623 DOI: 10.1021/acs.jpcb.0c01197] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While many practically important electrolytes contain lithium ions, interactions of these ions are particularly difficult to probe experimentally because of their small X-ray and neutron scattering cross sections and large neutron absorption cross sections. Molecular dynamics (MD) is a powerful tool for understanding the properties of nonaqueous electrolyte solutions from the atomic level, but the accuracy of this computational method crucially depends on the physics built into the classical force field. Here, we demonstrate that several force fields for lithium bistriflimide (LiTFSI) in acetonitrile yield a solution structure that is consistent with the neutron scattering experiments, yet these models produce dramatically different ion dynamics in solution. Such glaring discrepancies indicate that inadequate representation of long-range interactions leads to excessive ionic association and ion-pair clustering. We show that reasonable agreement with the experimental observations can be achieved by renormalization of the ion charges using a "titration" method suggested herewith. This simple modification produces realistic concentration dependencies for ionic diffusion and conductivity in <2 M solutions, without loss in quality for simulation of the structure.
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Affiliation(s)
- Zhixia Li
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States
| | - Lily A Robertson
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Ilya A Shkrob
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Kyle C Smith
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Program of Computational Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States
| | - Lei Cheng
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Materials Science Division, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Lu Zhang
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Jeffrey S Moore
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States
| | - Y Z
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States.,Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Program of Computational Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States.,Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois61801, United States
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12
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13
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Amith WD, Araque JC, Margulis CJ. A Pictorial View of Viscosity in Ionic Liquids and the Link to Nanostructural Heterogeneity. J Phys Chem Lett 2020; 11:2062-2066. [PMID: 32079397 DOI: 10.1021/acs.jpclett.0c00170] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Prototypical ionic liquids (ILs) are characterized by three structural motifs associated with (1) vicinal interactions, (2) the formation of positive-negative charge-alternating chains or networks, and (3) the alternation of these networks with apolar domains. In recent articles, we highlighted that the friction and mobility in these systems are nowhere close to being spatially homogeneous. This results in what one could call mechanical heterogeneity, where charge networks are intrinsically stiff and charge-depleted regions are softer, flexible, and mobile. This Letter attempts to provide a clear and visual connection between friction-associated with the dynamics of the structural motifs (in particular, the charge network)-and recent theoretical work by Yamaguchi linking the time-dependent viscosity of ILs to the decay of the charge alternation peak in the dynamic structure function. We propose that charge blurring associated with the loss of memory of where positive and negative charges are within networks is the key mechanism associated with viscosity in ILs. An IL will have low viscosity if a characteristic charge-blurring decorrelation time is low. With this in mind, engineering new low-viscosity ILs is reduced to understanding how to minimize this quantity.
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Affiliation(s)
| | - Juan C Araque
- School of Engineering, Benedictine College, Atchison, Kansas 66002, United States
| | - Claudio J Margulis
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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14
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Wu F, Sharma S, Roy S, Halstenberg P, Gallington LC, Mahurin SM, Dai S, Bryantsev VS, Ivanov AS, Margulis CJ. Temperature Dependence of Short and Intermediate Range Order in Molten MgCl2 and Its Mixture with KCl. J Phys Chem B 2020; 124:2892-2899. [DOI: 10.1021/acs.jpcb.0c00745] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fei Wu
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Shobha Sharma
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Santanu Roy
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Phillip Halstenberg
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Leighanne C. Gallington
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Shannon M. Mahurin
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sheng Dai
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Vyacheslav S. Bryantsev
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander S. Ivanov
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Claudio J. Margulis
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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15
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Warr GG, Atkin R. Solvophobicity and amphiphilic self-assembly in neoteric and nanostructured solvents. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2019.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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16
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Roy S, Wu F, Wang H, Ivanov AS, Sharma S, Halstenberg P, Gill SK, Milinda Abeykoon AM, Kwon G, Topsakal M, Layne B, Sasaki K, Zhang Y, Mahurin SM, Dai S, Margulis CJ, Maginn EJ, Bryantsev VS. Structure and dynamics of the molten alkali-chloride salts from an X-ray, simulation, and rate theory perspective. Phys Chem Chem Phys 2020; 22:22900-22917. [DOI: 10.1039/d0cp03672b] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molten salts are of great interest as alternative solvents, electrolytes, and heat transfer fluids in many emerging technologies.
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Affiliation(s)
- Santanu Roy
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Fei Wu
- Department of Chemistry
- The University of Iowa
- USA
| | - Haimeng Wang
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- USA
| | | | | | - Phillip Halstenberg
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
- Department of Chemistry
| | - Simerjeet K Gill
- Nuclear Science and Technology Department
- Brookhaven National Lab
- USA
| | | | - Gihan Kwon
- National Synchrotron Light Source II (NSLS-II)
- Brookhaven National Lab
- USA
| | - Mehmet Topsakal
- Nuclear Science and Technology Department
- Brookhaven National Lab
- USA
| | - Bobby Layne
- Chemistry Division
- Brookhaven National Lab
- USA
| | | | - Yong Zhang
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- USA
| | | | - Sheng Dai
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
- Department of Chemistry
| | | | - Edward J. Maginn
- Department of Chemical and Biomolecular Engineering
- University of Notre Dame
- USA
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17
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Wu F, Roy S, Ivanov AS, Gill SK, Topsakal M, Dooryhee E, Abeykoon M, Kwon G, Gallington LC, Halstenberg P, Layne B, Ishii Y, Mahurin SM, Dai S, Bryantsev VS, Margulis CJ. Elucidating Ionic Correlations Beyond Simple Charge Alternation in Molten MgCl 2-KCl Mixtures. J Phys Chem Lett 2019; 10:7603-7610. [PMID: 31738562 DOI: 10.1021/acs.jpclett.9b02845] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of technologies for nuclear reactors based on molten salts has seen a big resurgence. The success of thermodynamic models for these hinges in part on our ability to predict at the atomistic level the behavior of pure salts and their mixtures under a range of conditions. In this letter, we present high-energy X-ray scattering experiments and molecular dynamics simulations that describe the molten structure of mixtures of MgCl2 and KCl. As one would expect, KCl is a prototypical salt in which structure is governed by simple charge alternation. In contrast, MgCl2 and its mixtures with KCl display more complex correlations including intermediate-range order and the formation of Cl--decorated Mg2+ chains. A thorough computational analysis suggests that intermediate-range order beyond charge alternation may be traced to correlations between these chains. An analysis of the coordination structure for Mg2+ ions paints a more complex picture than previously understood, with multiple accessible states of distinct geometries.
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Affiliation(s)
- Fei Wu
- Department of Chemistry , The University of Iowa , Iowa City , Iowa 52242 , United States
| | - Santanu Roy
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Alexander S Ivanov
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Simerjeet K Gill
- Nuclear Science and Technology Department , Brookhaven National Lab , Upton , New York 11973 , United States
| | - Mehmet Topsakal
- Nuclear Science and Technology Department , Brookhaven National Lab , Upton , New York 11973 , United States
| | - Eric Dooryhee
- National Synchrotron Light Source II (NSLS-II) , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Milinda Abeykoon
- National Synchrotron Light Source II (NSLS-II) , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Gihan Kwon
- National Synchrotron Light Source II (NSLS-II) , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Leighanne C Gallington
- X-ray Science Division, Advanced Photon Source , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | - Phillip Halstenberg
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
- Deptartment of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , United States
| | - Bobby Layne
- Chemistry Division , Brookhaven National Laboratory , Upton , New York 11973-5000 , United States
| | - Yoshiki Ishii
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama, Toyonaka , Osaka 560-8531 , Japan
| | - Shannon M Mahurin
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Sheng Dai
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Vyacheslav S Bryantsev
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Claudio J Margulis
- Department of Chemistry , The University of Iowa , Iowa City , Iowa 52242 , United States
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18
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Kim H, Han M, Bandara SR, Espinosa-Marzal RM, Leal C. Mixing oil and water with ionic liquids: bicontinuous microemulsions under confinement. SOFT MATTER 2019; 15:9609-9613. [PMID: 31750504 DOI: 10.1039/c9sm01649j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report the structural transition of a phosphonium ionic liquid-based microemulsion from the bulk to nanoconfined between atomically flat micas. Upon the nanoconfinement, we observed a firmly surface-adsorbed ionic liquid film that stabilizes the nanoconfined microemulsion. Further confinement (<11 nm) induces rearrangements in the microemulsion culminating into two well-ordered layers with slow dynamics.
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Affiliation(s)
- Hojun Kim
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, IL-61801 Urbana, USA.
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19
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Mesoscopic structural organization in fluorinated pyrrolidinium-based room temperature ionic liquids. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111110] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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20
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Zhao M, Wu B, Lall-Ramnarine SI, Ramdihal JD, Papacostas KA, Fernandez ED, Sumner RA, Margulis CJ, Wishart JF, Castner EW. Structural analysis of ionic liquids with symmetric and asymmetric fluorinated anions. J Chem Phys 2019; 151:074504. [PMID: 31438705 DOI: 10.1063/1.5111643] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Ionic liquids (ILs) with relatively low viscosities and broad windows of electrochemical stability are often constructed by pairing asymmetric cations with bisfluorosulfonylimide (FSI-) or bistriflimide (NTf2 -) anions. In this work, we systematically studied the structures of ILs with these anions and related perfluorobis-sulfonylimide anions with asymmetry and/or longer chains: (fluorosulfonyl)(trifluoromethylsulfonyl)imide (BSI0,1 -), bis(pentafluoroethylsulfonyl)imide (BETI-), and (trifluoromethylsulfonyl) (nonafluorobutylsulfonyl)imide (BSI1,4 -) using high energy X-ray scattering and molecular dynamics simulation methods. 1-alkyl-3-methylimidazolium cations with shorter (ethyl, Im2,1 +) and longer (octyl, Im1,8 +) hydrocarbon chains were selected to examine how the sizes of nonpolar hydrocarbon and fluorous chains affect IL structures and properties. In comparison with these, we also computationally explored the structure of ionic liquids with anions having longer fluorinated tails.
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Affiliation(s)
- Man Zhao
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Boning Wu
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Sharon I Lall-Ramnarine
- Chemistry Department, Queensborough Community College of the City University of New York, Bayside, New York 11364, USA
| | - Jasodra D Ramdihal
- Chemistry Department, Queensborough Community College of the City University of New York, Bayside, New York 11364, USA
| | - Kristina A Papacostas
- Chemistry Department, Queensborough Community College of the City University of New York, Bayside, New York 11364, USA
| | - Eddie D Fernandez
- Chemistry Department, Queensborough Community College of the City University of New York, Bayside, New York 11364, USA
| | - Rawlric A Sumner
- Chemistry Department, Queensborough Community College of the City University of New York, Bayside, New York 11364, USA
| | - Claudio J Margulis
- Department of Chemistry, The University of Iowa, Iowa City, Iowa 52242, USA
| | - James F Wishart
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Edward W Castner
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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21
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Curry JN, Shaw SK. Thermotropic Phase Transitions in Butyltrimethylammonium Bis(trifluoromethylsulfonyl)imide Ionic Liquids are Dependent on Heat Flux. J Phys Chem B 2019; 123:4757-4765. [DOI: 10.1021/acs.jpcb.9b01650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jaclyn N. Curry
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52245, United States
| | - Scott K. Shaw
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52245, United States
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22
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Abstract
Ionic liquids have become of significant relevance in chemistry, as they can serve as environmentally-friendly solvents, electrolytes, and lubricants with bespoke properties. In particular for electrochemical applications, an understanding of the interface structure between the ionic liquid and an electrified interface is needed to model and optimize the reactions taking place on the solid surface. As with ionic liquids, the interplay between electrostatic forces and steric effects leads to an intrinsic heterogeneity, as the structure of the ionic liquid above an electrified interface cannot be described by the classical electrical double layer model. Instead, a layered solvation layer is present with a structure that depends on the material combination of the ionic liquid and substrate. In order to experimentally monitor this structure, atomic force spectroscopy (AFS) has become the method of choice. By measuring the force acting on a sharp microfabricated tip while approaching the surface in an ionic liquid, it has become possible to map the solvation layers with sub-nanometer resolution. In this review, we provide an overview of the AFS studies on ionic liquids published in recent years that illustrate how the interface is formed and how it can be modified by applying electrical potential or by adding impurities and solvents.
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23
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Lee J, Lau VM, Ren Y, Evans CM, Moore JS, Sottos NR. Effect of Polymerized Ionic Liquid Structure and Morphology on Shockwave Energy Dissipation. ACS Macro Lett 2019; 8:535-539. [PMID: 35619357 DOI: 10.1021/acsmacrolett.9b00133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The ability of nanosegregated polymerized ionic liquids (PILs) to dissipate shockwave energy is investigated for a series of imidazolium-based PILs with varying alkyl spacer length. The PILs are designed to have similar glass transition temperatures but different structures. X-ray scattering analysis reveals that each of the amorphous PILs exhibit distinct nanoscale structural heterogeneity, depending on the length of the chain spacer. We find that a higher structural heterogeneity, determined from the intensity of the intercluster scattering peak, in the PILs with longer alkyl spacers results in greater shockwave energy dissipation. In addition, we observe the crystalline phase is less effective at dissipating shockwave energy than the amorphous phase due to the close packed morphology and slow kinetics.
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24
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Lo Celso F, Appetecchi GB, Simonetti E, Zhao M, Castner EW, Keiderling U, Gontrani L, Triolo A, Russina O. Microscopic Structural and Dynamic Features in Triphilic Room Temperature Ionic Liquids. Front Chem 2019; 7:285. [PMID: 31119123 PMCID: PMC6507529 DOI: 10.3389/fchem.2019.00285] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 04/08/2019] [Indexed: 01/20/2023] Open
Abstract
Here we report a thorough investigation of the microscopic and mesoscopic structural organization in a series of triphilic fluorinated room temperature ionic liquids, namely [1-alkyl,3-methylimidazolium][(trifluoromethanesulfonyl)(nonafluorobutylsulfonyl)imide], with alkyl = ethyl, butyl, octyl ([Cnmim][IM14], n = 2, 4, 8), based on the synergic exploitation of X-ray and Neutron Scattering and Molecular Dynamics simulations. This study reveals the strong complementarity between X-ray/neutron scattering in detecting the complex segregated morphology in these systems at mesoscopic spatial scales. The use of MD simulations delivering a very good agreement with experimental data allows us to gain a robust understanding of the segregated morphology. The structural scenario is completed with determination of dynamic properties accessing the diffusive behavior and a relaxation map is provided for [C2mim][IM14] and [C8mim][IM14], highlighting their natures as fragile glass formers.
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Affiliation(s)
- Fabrizio Lo Celso
- Dipartimento di Fisica e Chimica, Università di Palermo, Palermo, Italy
| | | | | | - Man Zhao
- Department of Chemistry and Chemical Biology, Rutgers University, The State University of New Jersey, Newark, NJ, United States
| | - Edward W Castner
- Department of Chemistry and Chemical Biology, Rutgers University, The State University of New Jersey, Newark, NJ, United States
| | - Uwe Keiderling
- Soft Matter and Functional Materials, Helmholtz-Zentrum für Materialien und Energie GmbH, Berlin, Germany
| | - Lorenzo Gontrani
- Department of Chemistry, University of Rome Sapienza, Rome, Italy
| | - Alessandro Triolo
- Laboratorio Liquidi Ionici, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Rome, Italy
| | - Olga Russina
- Department of Chemistry, University of Rome Sapienza, Rome, Italy
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25
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Doughty B, Genix AC, Popov I, Li B, Zhao S, Saito T, Lutterman DA, Sacci RL, Sumpter BG, Wojnarowska Z, Bocharova V. Structural correlations tailor conductive properties in polymerized ionic liquids. Phys Chem Chem Phys 2019; 21:14775-14785. [DOI: 10.1039/c9cp02268f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, it was demonstrated that the mobile ion (anion) size and pendant group chemistry affect the packing of the polymer chains and influence conductivity in imidazolium based PolyILs.
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Affiliation(s)
- Benjamin Doughty
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Anne-Caroline Genix
- Laboratoire Charles Coulomb (L2C), Université de Montpellier
- CNRS
- F-34095 Montpellier
- France
| | - Ivan Popov
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Bingrui Li
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Sheng Zhao
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Tomonori Saito
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | | | - Robert L. Sacci
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Bobby G. Sumpter
- Center for Nanophase Materials Sciences
- Oak Ridge National Laboratory
- Oak Ridge
- USA
- Computational Sciences & Engineering Division
| | - Zaneta Wojnarowska
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
- Institute of Physics
| | - Vera Bocharova
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
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26
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Lepre LF, Pison L, Otero I, Gautier A, Dévemy J, Husson P, Pádua AAH, Costa Gomes M. Using hydrogenated and perfluorinated gases to probe the interactions and structure of fluorinated ionic liquids. Phys Chem Chem Phys 2019; 21:8865-8873. [DOI: 10.1039/c9cp00593e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Ionic liquids with perfluorinated instead of hydrogenated alkyl chains dissolve larger quantities of perfluorocarbon gases that are solvated in their apolar domains.
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Affiliation(s)
| | - Laure Pison
- CNRS
- Sigma Clermont
- ICCF Université Clermont-Auvergne
- F-63000 Clermont-Ferrand
- France
| | - Ines Otero
- CNRS
- Sigma Clermont
- ICCF Université Clermont-Auvergne
- F-63000 Clermont-Ferrand
- France
| | - Arnaud Gautier
- CNRS
- Sigma Clermont
- ICCF Université Clermont-Auvergne
- F-63000 Clermont-Ferrand
- France
| | - Julien Dévemy
- CNRS
- Sigma Clermont
- ICCF Université Clermont-Auvergne
- F-63000 Clermont-Ferrand
- France
| | - Pascale Husson
- CNRS
- Sigma Clermont
- ICCF Université Clermont-Auvergne
- F-63000 Clermont-Ferrand
- France
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27
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Lo Celso F, Yoshida Y, Lombardo R, Jafta C, Gontrani L, Triolo A, Russina O. Mesoscopic structural organization in fluorinated room temperature ionic liquids. CR CHIM 2018. [DOI: 10.1016/j.crci.2018.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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28
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Kapoor U, Shah JK. Effect of molecular solvents of varying polarity on the self-assembly of 1-n-dodecyl-3-methylimidazolium octylsulfate ionic liquid. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2018. [DOI: 10.1142/s0219633618400047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Large-scale molecular dynamics simulations consisting of more than 88,000–106,000 atoms for approximately 250 ns (including equilibration and production) were conducted to assess the effect of polar, nonpolar and amphiphilic molecular solvents on the nanoscale structuring of 1-[Formula: see text]-dodecyl-3-methylimidazolium [C[Formula: see text]mim] octylsulfate [C8SO4] ionic liquid (IL). Water [H2O], [Formula: see text]-octane [C8H[Formula: see text]] and 1-octanol [C8H[Formula: see text]OH] are employed as examples of polar, nonpolar, and amphiphilic molecules, respectively. The results indicate that each of these molecular solvents modify the nanosegregation behavior of the ionic liquid in a unique way. Water induces a high order of structuring of the ionic liquid as indicated by extremely high nematic order parameter for the system. In addition, the morphology of the neat ionic liquid is transformed from layer-like to that of bilayer-like in which the polar and nonpolar domains alternate. The presence of water also causes the stretching of the nonpolar domain, thus, increasing its size. At the concentration examined in this work, [Formula: see text]-octane is found to be only partially miscible with the ionic liquid. The polar network is maintained; however, the continuous cationic nonpolar domain is split into multiple domains. [Formula: see text]-octane is accommodated in the ionic liquid nonpolar domain. Similarly, the amphiphilicity of 1-octanol leads to an increase in the number of cationic as well as anionic domains. The overall nonpolar domain length, however, remains nearly identical to that found for the pure ionic liquid. Additional characterization of structural features of the three systems is discussed in terms of one-dimensional number densities, nematic order parameters for the overall systems and their components and structure factors.
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Affiliation(s)
- Utkarsh Kapoor
- School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
| | - Jindal K. Shah
- School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, USA
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29
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Lo Celso F, Appetecchi GB, Jafta CJ, Gontrani L, Canongia Lopes JN, Triolo A, Russina O. Nanoscale organization in the fluorinated room temperature ionic liquid: Tetraethyl ammonium (trifluoromethanesulfonyl)(nonafluorobutylsulfonyl)imide. J Chem Phys 2018; 148:193816. [DOI: 10.1063/1.5016236] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- F. Lo Celso
- Dipartimento di Fisica e Chimica, Viale delle Scienze, Ed. 17, 90128 Palermo, Italy
- Laboratorio Liquidi Ionici, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche, (ISM-CNR) Rome, Rome, Italy
| | | | - C. J. Jafta
- Soft Matter and Functional Materials, Helmholtz-Zentrum für Materialien und Energie GmbH, Berlin, Germany
| | - L. Gontrani
- Department of Chemistry, University of Rome Sapienza, Rome, Italy
| | - J. N. Canongia Lopes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - A. Triolo
- Laboratorio Liquidi Ionici, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche, (ISM-CNR) Rome, Rome, Italy
| | - O. Russina
- Department of Chemistry, University of Rome Sapienza, Rome, Italy
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30
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Lo Celso F, Yoshida Y, Castiglione F, Ferro M, Mele A, Jafta CJ, Triolo A, Russina O. Direct experimental observation of mesoscopic fluorous domains in fluorinated room temperature ionic liquids. Phys Chem Chem Phys 2018; 19:13101-13110. [PMID: 28489101 DOI: 10.1039/c7cp01971h] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Fluorinated room temperature ionic liquids (FRTILs) represent a class of solvent media that are attracting great attention due to their IL-specific properties as well as features stemming from their fluorous nature. Medium-to-long fluorous tails constitute a well-defined apolar moiety in the otherwise polar environment. Similarly to the case of alkyl tails, such chains are expected to result in the formation of self-assembled fluorous domains. So far, however, no direct experimental observation has been made of the existence of such structural heterogeneities on the nm scale. We report here the first experimental evidence of the existence of mesoscopic spatial segregation of fluorinated domains, on the basis of highly complementary X-ray and neutron scattering data sets (highlighting the importance of the latter probe) and NMR spectroscopy. Data are interpreted using atomistic molecular dynamics simulations, emphasizing the existence of a self-assembly mechanism that delivers segregated fluorous domains, where preferential solubilisation of fluorinated compounds can occur, thus paving the way for several smart applications.
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Affiliation(s)
- F Lo Celso
- Dipartimento di Fisica e Chimica, viale delle Scienze, ed. 17, 90128 Palermo, Italy
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31
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Lucio AJ, Shaw SK. Effects and controls of capacitive hysteresis in ionic liquid electrochemical measurements. Analyst 2018; 143:4887-4900. [DOI: 10.1039/c8an01085d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Capacitance vs. potential relationships help electrochemists better understand electrode–liquid interfacial behaviors.
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Affiliation(s)
| | - Scott K. Shaw
- Department of Chemistry
- University of Iowa
- Iowa City
- USA
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32
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Hu G, Pandey GP, Liu Q, Anaredy RS, Ma C, Liu M, Li J, Shaw SK, Wu J. Self-Organization of Ions at the Interface between Graphene and Ionic Liquid DEME-TFSI. ACS APPLIED MATERIALS & INTERFACES 2017; 9:35437-35443. [PMID: 28920423 DOI: 10.1021/acsami.7b10912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Electrochemical effects manifest as nonlinear responses to an applied electric field in electrochemical devices, and are linked intimately to the molecular orientation of ions in the electric double layer (EDL). Herein, we probe the origin of the electrochemical effect using a double-gate graphene field effect transistor (GFET) of ionic liquid N,N-diethyl-N-(2-methoxyethyl)-N-methylammonium bis(trifluoromethylsulfonyl)imide (DEME-TFSI) top-gate, paired with a ferroelectric Pb0.92La0.08Zr0.52Ti0.48O3 (PLZT) back-gate of compatible gating efficiency. The orientation of the interfacial molecular ions can be extracted by measuring the GFET Dirac point shift, and their dynamic response to ultraviolet-visible light and a gate electric field was quantified. We have observed that the strong electrochemical effect is due to the TFSI anions self-organizing on a treated GFET surface. Moreover, a reversible order-disorder transition of TFSI anions self-organized on the GFET surface can be triggered by illuminating the interface with ultraviolet-visible light, revealing that it is a useful method to control the surface ion configuration and the overall performance of the device.
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Affiliation(s)
- Guangliang Hu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an, Shaanxi 710049, China
- School of Microelectronics, Xi'an Jiaotong University , Xi'an, Shaanxi 710049, China
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| | - Gaind P Pandey
- Department of Chemistry, Kansas State University , Manhattan, Kansas 66506, United States
| | - Qingfeng Liu
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
| | - Radhika S Anaredy
- Department of Chemistry, University of Iowa , Iowa City, Iowa 52242, United States
| | - Chunrui Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an, Shaanxi 710049, China
| | - Ming Liu
- School of Microelectronics, Xi'an Jiaotong University , Xi'an, Shaanxi 710049, China
| | - Jun Li
- Department of Chemistry, Kansas State University , Manhattan, Kansas 66506, United States
| | - Scott K Shaw
- Department of Chemistry, University of Iowa , Iowa City, Iowa 52242, United States
| | - Judy Wu
- Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States
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33
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Rauber D, Heib F, Dier T, Volmer DA, Hempelmann R, Schmitt M. On the physicochemical and surface properties of 1-alkyl 3-methylimidazolium bis(nonafluorobutylsulfonyl)imide ionic liquids. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Rauber D, Philippi F, Hempelmann R. Catalyst retention utilizing a novel fluorinated phosphonium ionic liquid in Heck reactions under fluorous biphasic conditions. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.06.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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35
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Jiang HJ, Imberti S, Atkin R, Warr GG. Dichotomous Well-defined Nanostructure with Weakly Arranged Ion Packing Explains the Solvency of Pyrrolidinium Acetate. J Phys Chem B 2017; 121:6610-6617. [DOI: 10.1021/acs.jpcb.7b03045] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Haihui Joy Jiang
- School
of Chemistry and Australian Institute for Nanoscale Science and Technology, The University of Sydney, Sydney, NSW 2006, Australia
| | - Silvia Imberti
- STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - Rob Atkin
- School
of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Gregory G. Warr
- School
of Chemistry and Australian Institute for Nanoscale Science and Technology, The University of Sydney, Sydney, NSW 2006, Australia
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36
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Russina O, Lo Celso F, Plechkova N, Jafta CJ, Appetecchi GB, Triolo A. Mesoscopic organization in ionic liquids. Top Curr Chem (Cham) 2017; 375:58. [PMID: 28516337 DOI: 10.1007/s41061-017-0147-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 05/08/2017] [Indexed: 01/24/2023]
Abstract
We discuss some published results and provide new observations concerning the high level of structural complexity that lies behind the nanoscale correlations in ionic liquids (ILs) and their mixtures with molecular liquids. It turns out that this organization is a consequence of the hierarchical construction on both spatial (from ångström to several nanometer) and temporal (from fraction of picosecond to hundreds of nanosecond) scales, which requires joint use of experimental and computational tools.
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Affiliation(s)
- Olga Russina
- Dipartimento di Chimica, Università di Roma Sapienza, Rome, Italy
| | - Fabrizio Lo Celso
- Dipartimento di Fisica e Chimica, Università di Palermo, Palermo, Italy
| | - Natalia Plechkova
- QUILL, The Queen's University of Belfast, Stranmillis Road, Belfast, Northern Ireland, UK
| | - Charl J Jafta
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin, Germany
| | | | - Alessandro Triolo
- Laboratorio Liquidi Ionici, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche, Rome, Italy.
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37
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Liu J, He X. Accurate prediction of energetic properties of ionic liquid clusters using a fragment-based quantum mechanical method. Phys Chem Chem Phys 2017; 19:20657-20666. [DOI: 10.1039/c7cp03356g] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate prediction of physicochemical properties of ionic liquids (ILs) is of great significance to understand and design novel ILs with unique properties.
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Affiliation(s)
- Jinfeng Liu
- Department of Basic Medicine and Clinical Pharmacy
- China Pharmaceutical University
- Nanjing
- China
| | - Xiao He
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
- NYU-ECNU Center for Computational Chemistry at NYU Shanghai
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38
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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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39
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Rauber D, Zhang P, Huch V, Kraus T, Hempelmann R. Lamellar structures in fluorinated phosphonium ionic liquids: the roles of fluorination and chain length. Phys Chem Chem Phys 2017; 19:27251-27258. [DOI: 10.1039/c7cp04814a] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We report a new lamellar superstructure and non-Newtonian shear thinning behavior in fluorinated phosphonium dicyanamide ILs.
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Affiliation(s)
| | - Peng Zhang
- INM-Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
| | | | - Tobias Kraus
- INM-Leibniz Institute for New Materials
- 66123 Saarbrücken
- Germany
- Colloid and Interface Chemistry
- Saarland University
| | - Rolf Hempelmann
- Saarland University
- 66123 Saarbrücken
- Germany
- Transfercentre Sustainable Electrochemistry
- Saarland University and KIST Europe
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40
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Firaha DS, Thomas M, Hollóczki O, Korth M, Kirchner B. Can dispersion corrections annihilate the dispersion-driven nano-aggregation of non-polar groups? An ab initio molecular dynamics study of ionic liquid systems. J Chem Phys 2016; 145:204502. [DOI: 10.1063/1.4967861] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Dzmitry S. Firaha
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
| | - Martin Thomas
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
| | - Oldamur Hollóczki
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
| | - Martin Korth
- Institut für Theoretische Chemie, Universität Ulm, Albert-Einstein-Allee 11, 89069 Ulm, Germany
| | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry, Rheinische Friedrich-Wilhelms-Universität Bonn, Beringstr. 4+6, D-53115 Bonn, Germany
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41
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Sheridan QR, Oh S, Morales-Collazo O, Castner EW, Brennecke JF, Maginn EJ. Liquid Structure of CO2–Reactive Aprotic Heterocyclic Anion Ionic Liquids from X-ray Scattering and Molecular Dynamics. J Phys Chem B 2016; 120:11951-11960. [DOI: 10.1021/acs.jpcb.6b07713] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Quintin R. Sheridan
- Department
of Chemical and Biomolecular Engineering University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Seungmin Oh
- Department
of Chemical and Biomolecular Engineering University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Oscar Morales-Collazo
- Department
of Chemical and Biomolecular Engineering University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Edward W. Castner
- Department
of Chemistry and Chemical Biology Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Joan F. Brennecke
- Department
of Chemical and Biomolecular Engineering University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Edward J. Maginn
- Department
of Chemical and Biomolecular Engineering University of Notre Dame, Notre
Dame, Indiana 46556, United States
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42
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Amith WD, Hettige JJ, Castner EW, Margulis CJ. Structures of Ionic Liquids Having Both Anionic and Cationic Octyl Tails: Lamellar Vacuum Interface vs Sponge-Like Bulk Order. J Phys Chem Lett 2016; 7:3785-3790. [PMID: 27607189 DOI: 10.1021/acs.jpclett.6b01763] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Numerous experimental and computational studies have shown that the structure of ionic liquids is significantly influenced by confinement and by interactions with interfaces. The nature of the interface can affect the immediate ordering of cations and anions, changing important rheological characteristics relevant to lubrication. Most studies suggest that such changes are local or short-ranged and that bulk properties are reestablished on a length scale of a few nanometers. The current study focuses on the 1-methyl-3-octylimidazolium octylsulfate ionic liquid for which both the cation and anion have moderate length linear alkyl tails. For this system, we find that the bulk phase is dominated by the very common sponge-like morphology characteristic of many ionic liquids. However, at the vacuum interface, a lamellar structure is observed that is not restricted to the vicinity of the surface but instead extends across the full 9 nm slab of our simulation. We suspect that in reality it could extend significantly beyond this.
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Affiliation(s)
| | - Jeevapani J Hettige
- Department of Chemistry, University of Iowa , Iowa City, Iowa 52242, United States
| | - Edward W Castner
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , Piscataway, New Jersey 08854, United States
| | - Claudio J Margulis
- Department of Chemistry, University of Iowa , Iowa City, Iowa 52242, United States
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43
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Anaredy R, Lucio AJ, Shaw SK. Adventitious Water Sorption in a Hydrophilic and a Hydrophobic Ionic Liquid: Analysis and Implications. ACS OMEGA 2016; 1:407-416. [PMID: 31457136 PMCID: PMC6640805 DOI: 10.1021/acsomega.6b00104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 09/05/2016] [Indexed: 05/26/2023]
Abstract
The sorption of water in ionic liquids (ILs) is nearly impossible to prevent, and its presence is known to have a significant effect on the resulting mixtures' bulk and interfacial properties. The so-called "saturation" water concentrations have been reported, but water sorption rates and mixing behaviors in ILs are often overlooked as variables that can significantly change the resulting mixtures' physical properties over experimental time frames of several minutes to hours. The purpose of this work is to establish a range of these effects over similar time frames for two model ILs, protic ethylammonium nitrate (EAN) and aprotic butyltrimethylammonium bis(trifluoromethylsulfonyl)imide (N1114 TFSI), as they are exposed to controlled dry and humid environments. We report the water sorption rates for these liquids (270 ± 30 ppm/min for EAN and 30 ± 3 ppm/min for N1114 TFSI), examine the accuracy and precision associated with common methods for reporting water content, and discuss implications of changing water concentrations on experimental data and results.
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44
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Anaredy RS, Shaw SK. Long-Range Ordering of Ionic Liquid Fluid Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5147-54. [PMID: 27138261 DOI: 10.1021/acs.langmuir.6b00304] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We report the transformation of ionic liquid films from isotropic bulk to a fluid-ordered state over micrometer length scales. Data from infrared and nonlinear spectroscopy measurements show clear transitions that, for varying ionic liquids, occur over time frames of 10 min to 2 h. These maturation times depend linearly on the chosen ionic liquids' bulk viscosities. Interestingly, the ionic liquids do not form solids upon ordering but do exhibit strong preferential alignments of molecules that persist throughout the fluid films' thicknesses. Our measurements characterize this ordering process and show that it is largely insensitive to substrate surface chemistry or small amounts of absorbed water. Additional experiments show the transition is observed across several of the most common ionic liquid cations and that the process is completely reversible. The driving force for this organization is attributed to electrostatic and steric forces combined with a slow shearing of the viscous ionic liquid. These interactions work together to slowly bring the molecules within the film to a preferred, global orientation. The physical length and time scales of this transformation are unexpected and intriguing and invite additional studies to develop an understanding and control of ionic liquid materials' behavior, particularly near surfaces, to benefit their uses in lubrication, capacitive energy storage, and heterogeneous catalysis.
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Affiliation(s)
- Radhika S Anaredy
- Department of Chemistry, University of Iowa , Iowa City, Iowa 52242, United States
| | - Scott K Shaw
- Department of Chemistry, University of Iowa , Iowa City, Iowa 52242, United States
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45
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Liu H, Paddison SJ. Direct Comparison of Atomistic Molecular Dynamics Simulations and X-ray Scattering of Polymerized Ionic Liquids. ACS Macro Lett 2016; 5:537-543. [PMID: 35607231 DOI: 10.1021/acsmacrolett.6b00061] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The design of solid-state electrolytes for electrochemical applications that utilize polymerized ionic liquids (polyILs) would greatly benefit from a molecular-level understanding of structure-function relationships. We herein use atomistic molecular dynamics simulations to investigate the structural properties of a homologous series of poly(n-alkyl-vinylimidzolium bistrifluoromethylsulfonylimide) poly(nVim Tf2N) and present the first direct comparison of the structure factors obtained from X-ray scattering and simulations. Excellent agreement is found in terms of peak position and shape. The backbone-to-backbone correlation length increases at a rate of 1 Å/CH2. The longer alkyl chains lead to the longer backbone-to-backbone separation and the larger nonpolar nanodomains. This quantitative comparison of atomistic simulations to X-ray scattering will lead to a fundamental understanding in structure and morphology of polyILs and pave a path forward toward the rational design of future polyILs for electrochemical devices.
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Affiliation(s)
- Hongjun Liu
- Department of Chemical and
Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Stephen J. Paddison
- Department of Chemical and
Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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46
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Hettige JJ, Araque JC, Kashyap HK, Margulis CJ. Communication: Nanoscale structure of tetradecyltrihexylphosphonium based ionic liquids. J Chem Phys 2016; 144:121102. [DOI: 10.1063/1.4944678] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Juan C. Araque
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA
| | - Hemant K. Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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47
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Liu H, Paddison SJ. Direct calculation of the X-ray structure factor of ionic liquids. Phys Chem Chem Phys 2016; 18:11000-7. [DOI: 10.1039/c5cp06199g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A conceptually simple and computationally efficient direct method to calculate the total X-ray structure factor of ionic liquids from molecular simulations is advocated to be complementary to the popular Fourier transform (FT) method.
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Affiliation(s)
- Hongjun Liu
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
| | - Stephen J. Paddison
- Department of Chemical & Biomolecular Engineering
- University of Tennessee
- Knoxville
- USA
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48
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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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49
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Jurado LA, Kim H, Rossi A, Arcifa A, Schuh JK, Spencer ND, Leal C, Ewoldt RH, Espinosa-Marzal RM. Effect of the environmental humidity on the bulk, interfacial and nanoconfined properties of an ionic liquid. Phys Chem Chem Phys 2016; 18:22719-30. [DOI: 10.1039/c6cp03777a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Structural and dynamical properties of ILs are altered by the weakening of ion–ion correlations in the presence of water.
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Affiliation(s)
- L. Andres Jurado
- Dept. of Civil and Environmental Engineering
- University of Illinois at Urbana-Champaign
- IL-61801 Urbana
- USA
| | - Hojun Kim
- Dept. of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- IL-61801 Urbana
- USA
| | - Antonella Rossi
- Lab. for Surface Science and Technology
- Dept. of Materials
- ETH Zurich
- CH-8093 Zurich
- Switzerland
| | - Andrea Arcifa
- Lab. for Surface Science and Technology
- Dept. of Materials
- ETH Zurich
- CH-8093 Zurich
- Switzerland
| | - Jonathon K. Schuh
- Dept. of Mechanical Science and Engineering
- University of Illinois at Urbana-Champaign
- IL-61801 Urbana
- USA
| | - Nicholas D. Spencer
- Lab. for Surface Science and Technology
- Dept. of Materials
- ETH Zurich
- CH-8093 Zurich
- Switzerland
| | - Cecilia Leal
- Dept. of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- IL-61801 Urbana
- USA
| | - Randy H. Ewoldt
- Dept. of Mechanical Science and Engineering
- University of Illinois at Urbana-Champaign
- IL-61801 Urbana
- USA
| | - Rosa M. Espinosa-Marzal
- Dept. of Civil and Environmental Engineering
- University of Illinois at Urbana-Champaign
- IL-61801 Urbana
- USA
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50
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Yang K, Lee J, Sottos NR, Moore JS. Shock-Induced Ordering in a Nano-segregated Network-Forming Ionic Liquid. J Am Chem Soc 2015; 137:16000-3. [PMID: 26651363 DOI: 10.1021/jacs.5b10721] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Understanding shockwave-induced physical and chemical changes of impact-absorbing materials is an important step toward the rational design of materials that mitigate the damage. In this work, we report a series of network-forming ionic liquids (NILs) that possess an intriguing shockwave absorption property upon laser-induced shockwave. Microstructure analysis by X-ray scattering suggests nano-segregation of alkyl side chains and charged head groups in NILs. Further post-shock observations indicate changes in the low-Q region, implying that the soft alkyl domain in NILs plays an important role in absorbing shockwaves. Interestingly, we observe a shock-induced ordering in the NIL with the longest (hexyl) side chain, indicating that both nano-segregated structure and shock-induced ordering contribute to NIL's shockwave absorption performance.
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Affiliation(s)
- Ke Yang
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jaejun Lee
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Nancy R Sottos
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jeffrey S Moore
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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