1
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Faisal MA, Ahmed S, Susan MABH. Nanostructured ZnO with Tunable Morphology from Double-Salt Ionic Liquids as Soft Template. ACS OMEGA 2024; 9:12992-13005. [PMID: 38524491 PMCID: PMC10955582 DOI: 10.1021/acsomega.3c09374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/26/2023] [Accepted: 01/05/2024] [Indexed: 03/26/2024]
Abstract
ZnO nanostructures with tunable morphology were synthesized by the hydrothermal method from two ionic liquids (ILs), 1-ethyl-3-methylimidazolium acetate [C2mim]CH3CO2 and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C2mim](CF3SO2)2N and their corresponding double-salt ILs (DSILs). ILs served as soft templates. DSILs were noted for the production of smaller particle size along with uniformity compared to their pure IL counterparts. A changeover of the shape of ZnO from nano-prism to a hexagonal disk-like structure was observed with the addition of [C2mim]CH3CO2 in the medium during synthesis while nano-dice- and rod-shaped particles were obtained from [C2mim](CF3SO2)2N. The effect of concentration of both ILs was explored for the variations of size and shape, and at high concentrations, the morphology was distinct and sharp with uniform size in each case. The synthesized products exhibited excellent phase (wurtzite) purity and polycrystalline nature. The smallest crystallite size was acquired from DSILs, indicating the advantageous effect of the dual anions. The selective adsorption effect of [C2mim]CH3CO2 on certain facets promoted the growth of ZnO clusters along the [1010] direction, while [C2mim](CF3SO2)2N favored the growth along the [0001] direction. Consequently, DSILs rendered interpenetrating hexagonal disks due to the combined action of the anions for controlling the shape. The band gap energies of the nanoparticles (NPs) were consistent with the distribution of size. Extremely strong red emission and negligible UV emission for the synthesized ZnO NPs demonstrate their potential in the advancement of optoelectronic devices.
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Affiliation(s)
- Md. Arif Faisal
- Department
of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh
| | - Saika Ahmed
- Department
of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh
| | - Md. Abu Bin Hasan Susan
- Department
of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh
- Dhaka
University Nanotechnology Centre (DUNC), University of Dhaka, Dhaka 1000, Bangladesh
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2
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Parmar SM, Depew DD, Wirz RE, Vaghjiani GL. Structural Properties of HEHN- and HAN-Based Ionic Liquid Mixtures: A Polarizable Molecular Dynamics Study. J Phys Chem B 2023; 127:8616-8633. [PMID: 37776252 DOI: 10.1021/acs.jpcb.3c02649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/02/2023]
Abstract
Molecular dynamics simulations of binary mixtures comprising 2-hydroxyethylhydrazinium nitrate (HEHN) and hydroxylammonium nitrate (HAN) were conducted using the polarizable APPLE&P force field to investigate fundamental properties of multimode propulsion (MMP) propellants. Calculated densities as a function of temperature were in good agreement with experiments and similar simulations. The structural properties of neat HEHN and HAN-HEHN provided insights into their inherent, protic nature. Radial distribution functions (RDFs) identified key hydrogen bonding sites located at N-H···O and O-H···O within a first solvation shell of approximately 2 Å. Angular distribution functions further affirmed the relatively strong nature of the hydrogen bonds with nearly linear directionality. The increased hydroxylammonium cation (HA+) mole fraction shows the influence of competitively strong hydrogen bonds on the overall hydrogen bond network. Dominant spatial motifs via three-dimensional distribution functions along with nearly nanosecond-long hydrogen bond lifetimes highlight the local bonding environment that may precede proton transfer reactions.
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Affiliation(s)
- Shehan M Parmar
- Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Daniel D Depew
- Department of Astronautical Engineering, University of Southern California, Los Angeles, California 90089, United States
| | - Richard E Wirz
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
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3
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Zhao R, Xu X, Wang Z, Zheng Y, Zhou Y, Yu Z. Structural microheterogeneity and hydrogen bonding properties in the mixtures of two ionic liquids with a common imidazolium cation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Measurement and correlation for the electrical conductivity of double salt ionic liquids with triple ions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Golub B, Ondo D, Ludwig R, Paschek D. Why Do Liquids Mix? The Mixing of Protic Ionic Liquids Sharing the Same Cation Is Apparently Driven by Enthalpy, Not Entropy. J Phys Chem Lett 2022; 13:3556-3561. [PMID: 35420814 DOI: 10.1021/acs.jpclett.2c00634] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We study hydrogen bond (HB) redistribution in mixtures of two protic ionic liquids (PILs) sharing the same cation: triethylammonium methanesulfonate ([TEA][OMs]) and triethylammonium trifluoromethanesulfonate ([TEA][OTf]). The mixtures exhibit large negative energies of mixing. Based on results obtained from atomic detail molecular dynamics (MD) simulations, we derive a lattice model, discriminating between HB and nonspecific intermolecular interactions. We demonstrate that due to the ordered structure of the PILs, mostly the HB interactions contribute to the mixing energy. This allows to us to connect the equilibrium of HBs to each of the two anion species with the corresponding excess energies and entropies. The entropy associated with HB redistribution is shown to be negative, and even overcompensating the positive entropy associated with a statistical distribution of the ions in the mixture. This is strongly suggesting that the mixing process is driven by enthalpy, not entropy.
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Affiliation(s)
- Benjamin Golub
- Physikalische und Theoretische Chemie, Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 27, D-18059 Rostock, Germany
| | - Daniel Ondo
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5., 166 28 Prague 6, Czech Republic
| | - Ralf Ludwig
- Physikalische und Theoretische Chemie, Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 27, D-18059 Rostock, Germany
- Leibniz-Institut für Katalyse, Albert-Einstein-Straße 29a, D-18059 Rostock, Germany
| | - Dietmar Paschek
- Physikalische und Theoretische Chemie, Institut für Chemie, Universität Rostock, Albert-Einstein-Straße 27, D-18059 Rostock, Germany
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6
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Mital DK, Nancarrow P, Ibrahim TH, Abdel Jabbar N, Khamis MI. Ionic Liquid Melting Points: Structure–Property Analysis and New Hybrid Group Contribution Model. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Dhruve Kumar Mital
- Department of Chemical Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Paul Nancarrow
- Department of Chemical Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Taleb Hassan Ibrahim
- Department of Chemical Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Nabil Abdel Jabbar
- Department of Chemical Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Mustafa I. Khamis
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, P.O.
Box 26666, Sharjah, United Arab Emirates
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7
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Tunning CO 2 Separation Performance of Ionic Liquids through Asymmetric Anions. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27020413. [PMID: 35056728 PMCID: PMC8778609 DOI: 10.3390/molecules27020413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 12/31/2021] [Accepted: 01/04/2022] [Indexed: 11/17/2022]
Abstract
This work aims to explore the gas permeation performance of two newly-designed ionic liquids, [C2mim][CF3BF3] and [C2mim][CF3SO2C(CN)2], in supported ionic liquid membranes (SILM) configuration, as another effort to provide an overall insight on the gas permeation performance of functionalized-ionic liquids with the [C2mim]+ cation. [C2mim][CF3BF3] and [C2mim][CF3SO2C(CN)2] single gas separation performance towards CO2, N2, and CH4 at T = 293 K and T = 308 K were measured using the time-lag method. Assessing the CO2 permeation results, [C2mim][CF3BF3] showed an undermined value of 710 Barrer at 293.15 K and 1 bar of feed pressure when compared to [C2mim][BF4], whereas for the [C2mim][CF3SO2C(CN)2] IL an unexpected CO2 permeability of 1095 Barrer was attained at the same experimental conditions, overcoming the results for the remaining ILs used for comparison. The prepared membranes exhibited diverse permselectivities, varying from 16.9 to 22.2 for CO2/CH4 and 37.0 to 44.4 for CO2/N2 gas pairs. The thermophysical properties of the [C2mim][CF3BF3] and [C2mim][CF3SO2C(CN)2] ILs were also determined in the range of T = 293.15 K up to T = 353.15 K at atmospheric pressure and compared with those for other ILs with the same cation and anion's with similar chemical moieties.
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8
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Golub B, Ondo D, Overbeck V, Ludwig R, Paschek D. Hydrogen Bond Redistribution Effects in Mixtures of Protic Ionic Liquids Sharing the Same Cation: Non-ideal Mixing with Large Negative Mixing Enthalpies. Phys Chem Chem Phys 2022; 24:14740-14750. [DOI: 10.1039/d2cp01209j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a joint experimental and theoretical study characterising the hydrogen bond (HB) redistribution in mixtures of two different protic ionic liquids (PILs) sharing the same cation: triethylammonium-methanesulfonate ([TEA][OMs]) and...
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9
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Li Z, Dewulf B, Binnemans K. Nonaqueous Solvent Extraction for Enhanced Metal Separations: Concept, Systems, and Mechanisms. Ind Eng Chem Res 2021; 60:17285-17302. [PMID: 34898845 PMCID: PMC8662634 DOI: 10.1021/acs.iecr.1c02287] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 10/06/2021] [Accepted: 10/27/2021] [Indexed: 11/30/2022]
Abstract
Efficient and sustainable separation of metals is gaining increasing attention, because of the essential roles of many metals in sustainable technologies for a climate-neutral society, such as rare earths in permanent magnets and cobalt, nickel, and manganese in the cathode materials of lithium-ion batteries. The separation and purification of metals by conventional solvent extraction (SX) systems, which consist of an organic phase and an aqueous phase, has limitations. By replacing the aqueous phase with other polar solvents, either polar molecular organic solvents or ionic solvents, nonaqueous solvent extraction (NASX) largely expands the scope of SX, since differences in solvation of metal ions lead to different distribution behaviors. This Review emphasizes enhanced metal extraction and remarkable metal separations observed in NASX systems and discusses the effects of polar solvents on the extraction mechanisms according to the type of polar solvents and the type of extractants. Furthermore, the considerable effects of the addition of water and complexing agents on metal separations in terms of metal ion solvation and speciation are highlighted. Efforts to integrate NASX into metallurgical flowsheets and to develop closed-loop solvometallurgical processes are also discussed. This Review aims to construct a framework of NASX on which many more studies on this topic, both fundamental and applied, can be built.
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Affiliation(s)
| | | | - Koen Binnemans
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
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10
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Zotova J, Wojnarowska Z, Twamley B, Tajber L. Formation of stoichiometric and non-stoichiometric ionic liquid and cocrystal multicomponent phases of lidocaine with azelaic acid by changing counterion ratios. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117737] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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11
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Solid-liquid phase behavior of mixtures of 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amides involving long alkyl side chains. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Trenzado JL, Rodríguez Y, Gutiérrez A, Cincotti A, Aparicio S. Experimental and molecular modeling study on the binary mixtures of [EMIM][BF4] and [EMIM][TFSI] ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116049] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Parmar N, Bendová M, Wagner Z, Pěnkavová V, Douihri I, Jacquemin J. Carbon Nanotube-Based Ionanofluids for Efficient Energy Storage: Thermophysical Properties’ Determination and Advanced Data Analysis. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Nirmal Parmar
- Department of Chemistry and Physics of Aerosols, Institute of Chemical Process Fundamentals of the CAS, v.v.i., Rozvojová 135/1, 16502 Prague 6, Czech Republic
| | - Magdalena Bendová
- Department of Chemistry and Physics of Aerosols, Institute of Chemical Process Fundamentals of the CAS, v.v.i., Rozvojová 135/1, 16502 Prague 6, Czech Republic
| | - Zdeněk Wagner
- Department of Chemistry and Physics of Aerosols, Institute of Chemical Process Fundamentals of the CAS, v.v.i., Rozvojová 135/1, 16502 Prague 6, Czech Republic
| | - Věra Pěnkavová
- Department of Multiphase Reactors, Institute of Chemical Process Fundamentals of the CAS, v.v.i., Rozvojová 135/1, 16502 Prague 6, Czech Republic
| | - Ilias Douihri
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l’Energie (EA 6299), Faculté des Sciences et Techniques, Universite de Tours, parc de Grandmont, 37200 Tours, France
| | - Johan Jacquemin
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l’Energie (EA 6299), Faculté des Sciences et Techniques, Universite de Tours, parc de Grandmont, 37200 Tours, France
- Materials Science and Nano-Engineering, Mohammed VI Polytechnic University, Lot 660-Hay Moulay Rachid, 43150 Ben Guerir, Morocco
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14
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Mital DK, Nancarrow P, Zeinab S, Jabbar NA, Ibrahim TH, Khamis MI, Taha A. Group Contribution Estimation of Ionic Liquid Melting Points: Critical Evaluation and Refinement of Existing Models. Molecules 2021; 26:2454. [PMID: 33922374 PMCID: PMC8122861 DOI: 10.3390/molecules26092454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 11/17/2022] Open
Abstract
While several group contribution method (GCM) models have been developed in recent years for the prediction of ionic liquid (IL) properties, some challenges exist in their effective application. Firstly, the models have been developed and tested based on different datasets; therefore, direct comparison based on reported statistical measures is not reliable. Secondly, many of the existing models are limited in the range of ILs for which they can be used due to the lack of functional group parameters. In this paper, we examine two of the most diverse GCMs for the estimation of IL melting point; a key property in the selection and design of ILs for materials and energy applications. A comprehensive database consisting of over 1300 data points for 933 unique ILs, has been compiled and used to critically evaluate the two GCMs. One of the GCMs has been refined by introducing new functional groups and reparametrized to give improved performance for melting point estimation over a wider range of ILs. This work will aid in the targeted design of ILs for materials and energy applications.
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Affiliation(s)
- Dhruve Kumar Mital
- Department of Chemical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates; (D.K.M.); (S.Z.); (N.A.J.); (T.H.I.); (A.T.)
| | - Paul Nancarrow
- Department of Chemical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates; (D.K.M.); (S.Z.); (N.A.J.); (T.H.I.); (A.T.)
| | - Samira Zeinab
- Department of Chemical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates; (D.K.M.); (S.Z.); (N.A.J.); (T.H.I.); (A.T.)
| | - Nabil Abdel Jabbar
- Department of Chemical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates; (D.K.M.); (S.Z.); (N.A.J.); (T.H.I.); (A.T.)
| | - Taleb Hassan Ibrahim
- Department of Chemical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates; (D.K.M.); (S.Z.); (N.A.J.); (T.H.I.); (A.T.)
| | - Mustafa I. Khamis
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah 26666, United Arab Emirates;
| | - Alnoman Taha
- Department of Chemical Engineering, American University of Sharjah, Sharjah 26666, United Arab Emirates; (D.K.M.); (S.Z.); (N.A.J.); (T.H.I.); (A.T.)
- Department of Chemical Engineering, University of Birmingham, SW Campus, Birmingham B15 2TT, UK
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15
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Peng D, Horvat DP, Picchioni F. Computer-Aided Ionic Liquid Design and Experimental Validation for Benzene–Cyclohexane Separation. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05935] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daili Peng
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen, AG 9747, The Netherlands
| | - Diana P. Horvat
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen, AG 9747, The Netherlands
| | - Francesco Picchioni
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen, AG 9747, The Netherlands
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16
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Shirota H, Ando M, Kakinuma S, Takahashi K. Ultrafast Dynamics in Nonaromatic Cation Based Ionic Liquids: A Femtosecond Raman-Induced Kerr Effect Spectroscopic Study. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hideaki Shirota
- Department of Chemistry, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
| | - Masatoshi Ando
- Department of Chemistry, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
| | - Shohei Kakinuma
- Department of Chemistry, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
| | - Kotaro Takahashi
- Department of Chemistry, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
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17
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Kapoor U, Shah JK. Macroscopic Differentiators for Microscopic Structural Nonideality in Binary Ionic Liquid Mixtures. J Phys Chem B 2020; 124:7849-7856. [PMID: 32790368 DOI: 10.1021/acs.jpcb.0c03740] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Combining two ionic liquids to form a binary ionic liquid mixture is a simple yet effective strategy to not only expand the number of ionic liquids but also precisely control various physicochemical properties of resultant ionic liquid mixtures. From a fundamental thermodynamic point of view, it is not entirely clear whether such mixtures can be classified as ideal solutions. Given a large number of binary ionic liquid mixtures that emerge, the ability to predict the presence of nonideality in such mixtures a priori without the need for experimentation or molecular simulation-based calculations is immensely valuable for their rational design. In this research report, we demonstrate that the difference in the molar volumes (ΔV) of the pure ionic liquids and the difference in the hydrogen-bonding ability of anions (Δβ) are the primary determinants of nonideal behavior of binary ionic liquid mixtures containing a common cation and two anions. Our conclusion is derived from a comparison of microscopic structural properties expressed in terms of radial, spatial, and angular distributions for binary mixtures and those of the corresponding pure ionic liquids. Molecular dynamics simulations of 16 binary ionic liquid mixtures, containing a common cation 1-n-butyl-3-methylimidazolium [C4mim]+ and combinations of (less basic) fluorinated {trifluoromethylacetate [TFA]-, trifluoromethanesulfonate [TFS]-, bis(trifluoromethanesulfonyl)imide [NTf2]-, and tris (pentafluoroethyl) trifluorophosphate [eFAP]-} versus (more basic) nonfluorinated {chloride Cl-, acetate [OAC]-, methylsulfate [MeSO4]-, and dimethylphosphate [Me2PO4]-} anions, were conducted. The large number of binary ionic liquid mixtures examined here enabled us to span a broad range of ΔV and Δβ values. The results indicate that binary mixtures of two ionic liquids for which ΔV > 60 cm3/mol and Δβ > 0.4 are expected to be microscopically nonideal. On the other hand, ΔV < 60 cm3/mol and Δβ < 0.4 will lead to molecular structures that are not differentiated from those of their pure ionic liquid counterparts.
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Affiliation(s)
- Utkarsh Kapoor
- School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Jindal K Shah
- School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
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18
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Fang J, Wu J, Li C, Li H, Yang Q. Molecular design and comprehensive evaluation of solvents capable of simultaneously extracting multiple active substances. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116882] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Wang YL, Li B, Sarman S, Mocci F, Lu ZY, Yuan J, Laaksonen A, Fayer MD. Microstructural and Dynamical Heterogeneities in Ionic Liquids. Chem Rev 2020; 120:5798-5877. [PMID: 32292036 PMCID: PMC7349628 DOI: 10.1021/acs.chemrev.9b00693] [Citation(s) in RCA: 200] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Indexed: 12/11/2022]
Abstract
Ionic liquids (ILs) are a special category of molten salts solely composed of ions with varied molecular symmetry and charge delocalization. The versatility in combining varied cation-anion moieties and in functionalizing ions with different atoms and molecular groups contributes to their peculiar interactions ranging from weak isotropic associations to strong, specific, and anisotropic forces. A delicate interplay among intra- and intermolecular interactions facilitates the formation of heterogeneous microstructures and liquid morphologies, which further contributes to their striking dynamical properties. Microstructural and dynamical heterogeneities of ILs lead to their multifaceted properties described by an inherent designer feature, which makes ILs important candidates for novel solvents, electrolytes, and functional materials in academia and industrial applications. Due to a massive number of combinations of ion pairs with ion species having distinct molecular structures and IL mixtures containing varied molecular solvents, a comprehensive understanding of their hierarchical structural and dynamical quantities is of great significance for a rational selection of ILs with appropriate properties and thereafter advancing their macroscopic functionalities in applications. In this review, we comprehensively trace recent advances in understanding delicate interplay of strong and weak interactions that underpin their complex phase behaviors with a particular emphasis on understanding heterogeneous microstructures and dynamics of ILs in bulk liquids, in mixtures with cosolvents, and in interfacial regions.
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Affiliation(s)
- Yong-Lei Wang
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Bin Li
- School
of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, P. R. China
| | - Sten Sarman
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Francesca Mocci
- Department
of Chemical and Geological Sciences, University
of Cagliari, I-09042 Monserrato, Italy
| | - Zhong-Yuan Lu
- State
Key Laboratory of Supramolecular Structure and Materials, Institute
of Theoretical Chemistry, Jilin University, Changchun 130021, P. R. China
| | - Jiayin Yuan
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Aatto Laaksonen
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
- State
Key Laboratory of Materials-Oriented and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
- Centre of
Advanced Research in Bionanoconjugates and Biopolymers, Petru Poni Institute of Macromolecular Chemistry Aleea Grigore Ghica-Voda, 41A, 700487 Iasi, Romania
- Department
of Engineering Sciences and Mathematics, Division of Energy Science, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Michael D. Fayer
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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20
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Bouarab AF, Stolarska O, Harvey JP, Smiglak M, Robelin C. Viscosity of a Ternary Reciprocal System Consisting of 1-Alkylpyridinium Halides. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01496] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anya F. Bouarab
- Centre for Research in Computational Thermochemistry (CRCT), Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succursale “Downtown”, Montréal, Québec, H3C 3A7, Canada
| | - Olga Stolarska
- Faculty of Chemistry, Adam Mickiewicz University, Poznań, 61-614, Poland
| | - Jean-Philippe Harvey
- Centre for Research in Computational Thermochemistry (CRCT), Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succursale “Downtown”, Montréal, Québec, H3C 3A7, Canada
| | - Marcin Smiglak
- Poznan Science and Technology Park, Adam Mickiewicz University Foundation, Poznań, 61-612, Poland
| | - Christian Robelin
- Centre for Research in Computational Thermochemistry (CRCT), Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succursale “Downtown”, Montréal, Québec, H3C 3A7, Canada
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21
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Di
Pietro ME, Castiglione F, Mele A. Anions as Dynamic Probes for Ionic Liquid Mixtures. J Phys Chem B 2020; 124:2879-2891. [PMID: 32186377 PMCID: PMC7997561 DOI: 10.1021/acs.jpcb.0c00026] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 02/14/2020] [Indexed: 11/28/2022]
Abstract
Ionic liquid (IL) mixtures have been proposed as a viable alternative to rationally fine-tune the physicochemical properties of ILs for a variety of applications. The understanding of the effects of mixing ILs on the properties of the mixtures is however only in the very early stages. Two series of ionic liquid mixtures, based on the 1-ethyl-3-methylimidazolium and 1-dodecyl-3-methylimidazolium cations, and having a common anion (tetrafluoroborate or bis(trifluoromethylsulfonyl)imide), have been prepared and deeply characterized via multiple NMR techniques. Diffusion and relaxation methods combined with 2D ion-ion correlation (nuclear Overhauser enhancement) experiments have been used for a better understanding of the interplay between dynamics and structure of IL mixtures. A crucial role of the anion in driving the mixture's behavior emerged, making them important "dynamic probes" for gaining information of the polar and nonpolar regions of ionic liquids and their mixtures.
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Affiliation(s)
- Maria Enrica Di
Pietro
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Franca Castiglione
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Andrea Mele
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
- Istituto
di Scienze e Tecnologie Chimiche (SCITEC-CNR), Via A. Corti 12, 20133 Milano, Italy
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22
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Influence of Carboxylate Anions on Phase Behavior of Choline Ionic Liquid Mixtures. Molecules 2020; 25:molecules25071691. [PMID: 32272688 PMCID: PMC7180831 DOI: 10.3390/molecules25071691] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 03/30/2020] [Accepted: 04/02/2020] [Indexed: 11/17/2022] Open
Abstract
Mixing ionic liquids is a suitable strategy to tailor properties, e.g., to reduce melting points. The present study aims to widen the application range of low-toxic choline-based ionic liquids by studying eight binary phase diagrams of six different choline carboxylates. Five of them show eutectic points with melting points dropping by 13 to 45 °C. The eutectic mixtures of choline acetate and choline 2-methylbutarate were found to melt at 45 °C, which represents a remarkable melting point depression compared to the pure compounds with melting points of 81 (choline acetate) and 90 °C (choline 2-methylbutarate), respectively. Besides melting points, the thermal stabilities of the choline salt mixtures were investigated to define the thermal operation range for potential practical applications of these mixtures. Typical decomposition temperatures were found between 165 and 207 °C, with choline lactate exhibiting the highest thermal stability.
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23
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Warmińska D, Cichowska-Kopczyńska I. Thermodynamic study of binary mixtures of toluene with ionic liquids, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-hexyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and 1-butylpyridinium bis(trifluoromethylsulfonyl)imide. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112754] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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24
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Mirarabrazi M, Martins MAR, Pinho SP, Coutinho JAP, Robelin C. Solid-Liquid Equilibria for Hexafluorophosphate-Based Ionic Liquid Quaternary Mixtures and Their Corresponding Subsystems. J Phys Chem B 2019; 123:8954-8969. [PMID: 31525048 DOI: 10.1021/acs.jpcb.9b07545] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present work describes an experimental study and the thermodynamic modeling for the solid-liquid phase diagram of an ionic liquid quaternary system constituted by hexafluorophosphate ([PF6]-) as the common anion and by 1-methyl-3-propylimidazolium ([C3mim]+), 1-methyl-1-propylpyrrolidinium ([C3mpyrr]+), 1-methyl-3-propylpyridinium ([C3mpy]+), or 1-methyl-1-propylpiperidinium ([C3mpip]+) as the cations. The Modified Quasichemical Model was used to model the liquid solution, and the Compound Energy Formalism was used for the relevant solid solutions. The liquidus projections of the four ternary subsystems (1) [C3mim][PF6]-[C3mpip][PF6]-[C3mpyrr][PF6], (2) [C3mpy][PF6]-[C3mpip][PF6]-[C3mpyrr][PF6], (3) [C3mpip][PF6]-[C3mpy][PF6]-[C3mim][PF6], and (4) [C3mpyrr][PF6]-[C3mpy][PF6]-[C3mim][PF6] were predicted using a standard symmetric (for systems 3 and 4) or asymmetric (for systems 1 and 2) interpolation method. In order to test the accuracy of the thermodynamic model, two isoplethal sections were experimentally measured in each of the four ternary systems using differential scanning calorimetry. Overall, agreement was very satisfactory, not requiring fitting of any ternary interaction parameters for the liquid solution model. In each of the four calculated ternary liquidus projections, the region of composition corresponding to room temperature ionic liquid mixtures was determined. The global minimum of the liquidus temperature in the complete composition space was calculated to be about -16 °C, with a mole percentage composition of (33.8% [C3mpyrr][PF6] + 33.9% [C3mpy][PF6] + 32.3% [C3mim][PF6]).
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Affiliation(s)
- Meysam Mirarabrazi
- Centre for Research in Computational Thermochemistry (CRCT), Department of Chemical Engineering , Polytechnique Montréal , C.P. 6079, Succursale "Downtown" , Montréal , Québec H3C 3A7 , Canada
| | - Mónia A R Martins
- CICECO-Aveiro Institute of Materials, Department of Chemistry , University of Aveiro , 3810-193 Aveiro , Portugal.,Associate Laboratory LSRE-LCM, Department of Chemical and Biological Technology , Polytechnic Institute of Bragança , 5300-253 Bragança , Portugal.,Mountain Research Center-CIMO , Polytechnic Institute of Bragança , 5301-855 Bragança , Portugal
| | - Simão P Pinho
- Associate Laboratory LSRE-LCM, Department of Chemical and Biological Technology , Polytechnic Institute of Bragança , 5300-253 Bragança , Portugal.,Mountain Research Center-CIMO , Polytechnic Institute of Bragança , 5301-855 Bragança , Portugal
| | - João A P Coutinho
- CICECO-Aveiro Institute of Materials, Department of Chemistry , University of Aveiro , 3810-193 Aveiro , Portugal
| | - Christian Robelin
- Centre for Research in Computational Thermochemistry (CRCT), Department of Chemical Engineering , Polytechnique Montréal , C.P. 6079, Succursale "Downtown" , Montréal , Québec H3C 3A7 , Canada
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25
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Kurnia KA, Fernandes AM, Pinho SP, Coutinho JAP. Ion speciation: a key for the understanding of the solution properties of ionic liquid mixtures. Phys Chem Chem Phys 2019; 21:21626-21632. [PMID: 31549125 DOI: 10.1039/c9cp04533c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recently, combinations of two (or more) ionic liquids, known as ionic liquid mixtures, have become popular and have a broad range of applications. However, the fundamental knowledge on the molecular interactions that exist in ionic liquid mixtures is far from being understood. In this work, the experimental measurement of the water activity coefficient and computational modelling using Conductor-like Screening Model for Real Solvent (COSMO-RS) were carried out to get an insight into the molecular interactions that are present in ionic liquid mixtures in aqueous solution. The results show that the combination of two ionic liquids of different basicity in aqueous solution allows fine tuning of the water activities, covering a wide range of values that could replace several pure fluids. This is an important feature resulting from the unexpected ion speciation of the ionic liquid mixtures in aqueous solution.
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Affiliation(s)
- Kiki Adi Kurnia
- Department of Marine, Faculty of Fisheries and Marine, Universitas Airlangga, Jalan Mulyorejo Kampus C, Surabaya, 60115, Indonesia.
| | - Ana M Fernandes
- QOPNA, Department of Chemistry, Universidade de Aveiro, Aveiro 3810-193, Portugal
| | - Simão P Pinho
- Associate Laboratory LSRE/LCM, Instituto Politécnico de Bragança, Bragança 5301-857, Portugal and Centro de Investigação de Montaha (CIMO), Instituto Politécnico de Bragança, Bragança 5301-857, Portugal
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, Universidade de Aveiro, Aveiro 3810-193, Portugal.
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26
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Lu X, Xie H, Lei Q, Fang W. A combined experimental and theoretical study on the structures, interactions and volumetric properties of guanidinium-based ionic liquid mixtures. Phys Chem Chem Phys 2019; 21:17720-17728. [PMID: 31367708 DOI: 10.1039/c9cp02999k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Mixtures of ionic liquids (ILs) have shown their potential in both physical and chemical processes, regarded as alternatives to common ILs. In this work, four guanidinium-based ILs, 2-ethyl-1,1,3,3-tetramethylguanidinium ethyl sulfate ([TMG(C2)][C2OSO3]) and bis(trifluoromethylsulfonyl)imide ([TMG(C2)][NTf2]), and 2,2-diethyl-1,1,3,3-tetramethylguanidinium ethyl sulfate ([TMG(C2)2][C2OSO3]) and bis(trifluoromethylsulfonyl)imide ([TMG(C2)2][NTf2]), are employed to investigate the structures, interactions and properties of four systems of IL-IL binary mixtures, including [TMG(C2)][C2OSO3]x[NTf2]1-x, [TMG(C2)]x[TMG(C2)2]1-x[C2OSO3], [TMG(C2)]x[TMG(C2)2]1-x[NTf2] and [TMG(C2)2][NTf2]x[C2OSO3]1-x. Combining experiments with theory, the relationships among H-bond interactions, structures and volumetric properties have been revealed. 1H NMR characterizations show the changes of H-bond interactions in the IL-IL mixtures in relation to composition, and DFT calculations reveal significant cation-anion interactions through the active hydrogen atom (N+-H) and the methyl groups in the cations with the anions in the manner of HO and HF. The ethyl group in the [C2OSO3]- anion hardly forms interactions with other components. The size effect of the calculated system has been evaluated for the IL-IL clusters with 2, 4 and 8 ions. Different structures due to variation of cationic and anionic species have remarkable influence on the volumetric properties of the IL-IL mixtures. Negative excess molar volume (VEm) is found in [TMG(C2)]x[TMG(C2)2]1-x[C2OSO3], and it is caused by the close packing of ions. Positive VEm values indicate that interaction loss occurs in the other three systems, where a linear arrangement or square packing of ions with low space utilization is found.
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Affiliation(s)
- Xiaoxing Lu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, P. R. China.
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27
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Tanimura K, Amau M, Kume R, Suga K, Okamoto Y, Umakoshi H. Characterization of Ionic Liquid Aqueous Two-Phase Systems: Phase Separation Behaviors and the Hydrophobicity Index between the Two Phases. J Phys Chem B 2019; 123:5866-5874. [PMID: 31199653 DOI: 10.1021/acs.jpcb.9b04848] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1-Allyl-3-methylimidazolium chloride [Amim][Cl] and 1-butyl-3-methylimidazolium chloride [Bmim][Cl] are water-soluble ionic liquids (ILs) that can from an aqueous two-phase system (ATPS) when mixed with specific salts. Herein, we prepared [Amim][Cl]- and [Bmim][Cl]-ATPSs by adding the salts (K2CO3, K2HPO4). To investigate the phase separation behavior of the IL-ATPSs, binodal curves were drawn at different temperatures and the length and slope of the tie lines were analyzed. The [Bmim][Cl]/K2HPO4 system underwent two-phase separation at lower temperature conditions, suggesting that the phase separation might depend on the salting-out effect in the bottom phase. Using the IL-ATPS, the distribution coefficients, Kaa, of amino acids were determined and used to characterize the hydrophobicity index (HF) between the top and bottom phases, which is a good indicator to understand the molecular partitioning behaviors in conventional ATPSs. The HF values of the IL-ATPSs were in the range 0.13-0.41 mol/kJ; these values were almost the same as the HF values reported for an ATPS composed of poly(ethylene glycol) and salt.
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Affiliation(s)
- Kazuhiko Tanimura
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama-cho , Toyonaka , Osaka 560-8531 , Japan.,Hitachi Zosen Corporation , 1-7-89 Nanko-kita , Sumiyoshi-ku , Osaka 559-8559 , Japan
| | - Misaki Amau
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama-cho , Toyonaka , Osaka 560-8531 , Japan
| | - Ryosuke Kume
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama-cho , Toyonaka , Osaka 560-8531 , Japan
| | - Keishi Suga
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama-cho , Toyonaka , Osaka 560-8531 , Japan
| | - Yukihiro Okamoto
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama-cho , Toyonaka , Osaka 560-8531 , Japan
| | - Hiroshi Umakoshi
- Division of Chemical Engineering, Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama-cho , Toyonaka , Osaka 560-8531 , Japan
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28
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Lepre LF, Costa Gomes M, Pádua AAH, Ando RA, Ribeiro MCC. On the Regular Behavior of a Binary Mixture of Ionic Liquids. J Phys Chem B 2019; 123:6579-6587. [DOI: 10.1021/acs.jpcb.9b04724] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luiz F. Lepre
- Laboratoire de Chimie, Ecole Normale Supérieure de Lyon & CNRS, 69364 Lyon, France
| | | | - Agílio A. H. Pádua
- Laboratoire de Chimie, Ecole Normale Supérieure de Lyon & CNRS, 69364 Lyon, France
| | - Rômulo A. Ando
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Mauro C. C. Ribeiro
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
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29
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Song Z, Hu X, Zhou Y, Zhou T, Qi Z, Sundmacher K. Rational design of double salt ionic liquids as extraction solvents: Separation of thiophene/
n
‐octane as example. AIChE J 2019. [DOI: 10.1002/aic.16625] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Zhen Song
- Process Systems EngineeringMax Planck Institute for Dynamics of Complex Technical Systems Magdeburg Germany
| | - Xutao Hu
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering, School of Chemical EngineeringEast China University of Science and Technology Shanghai China
| | - Yageng Zhou
- Process Systems EngineeringMax Planck Institute for Dynamics of Complex Technical Systems Magdeburg Germany
| | - Teng Zhou
- Process Systems EngineeringMax Planck Institute for Dynamics of Complex Technical Systems Magdeburg Germany
| | - Zhiwen Qi
- Max Planck Partner Group at the State Key Laboratory of Chemical Engineering, School of Chemical EngineeringEast China University of Science and Technology Shanghai China
| | - Kai Sundmacher
- Process Systems EngineeringMax Planck Institute for Dynamics of Complex Technical Systems Magdeburg Germany
- Process Systems EngineeringOtto‐von‐Guericke University Magdeburg Magdeburg Germany
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30
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Weber CC, Brooks NJ, Castiglione F, Mauri M, Simonutti R, Mele A, Welton T. On the structural origin of free volume in 1-alkyl-3-methylimidazolium ionic liquid mixtures: a SAXS and 129Xe NMR study. Phys Chem Chem Phys 2019; 21:5999-6010. [PMID: 30809621 DOI: 10.1039/c9cp00587k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionic liquid (IL) mixtures enable the design of fluids with finely tuned structural and physicochemical properties for myriad applications. In order to rationally develop and design IL mixtures with the desired properties, a thorough understanding of the structural origins of their physicochemical properties and the thermodynamics of mixing needs to be developed. To elucidate the structural origins of the excess molar volume within IL mixtures containing ions with different alkyl chain lengths, 3 IL mixtures containing 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ILs have been explored in a joint small angle X-ray scattering (SAXS) and 129Xe NMR study. The apolar domains of the IL mixtures were shown to possess similar dimensions to the largest alkyl chain of the mixture with the size evolution determined by whether the shorter alkyl chain was able to interact with the apolar domain. 129Xe NMR results illustrated that the origin of excess molar volume in these mixtures was due to fluctuations within these apolar domains arising from alkyl chain mismatch, with the formation of a greater number of smaller voids within the IL structure. These results indicate that free volume effects for these types of mixtures can be predicted from simple considerations of IL structure and that the structural basis for the formation of excess molar volume in these mixtures is substantially different to IL mixtures formed of different types of ions.
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Affiliation(s)
- Cameron C Weber
- School of Science, Auckland University of Technology, Auckland, New Zealand
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31
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Deep eutectic solvents formed by quaternary ammonium salts and aprotic organic compound succinonitrile. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.150] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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32
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Gouveia ASL, Bernardes CES, Lozinskaya EI, Shaplov AS, Canongia Lopes JN, Marrucho IM. Neat ionic liquids versus ionic liquid mixtures: a combination of experimental data and molecular simulation. Phys Chem Chem Phys 2019; 21:23305-23309. [DOI: 10.1039/c9cp03021b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Simple mixtures of ionic liquids (IL–IL mixtures) can become a promising approach for the substitution of task-specific ILs.
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Affiliation(s)
- Andreia S. L. Gouveia
- Centro de Química Estrutural
- Departamento de Engenharia Química
- Instituto Superior Técnico
- Universidade de Lisboa
- Avenida Rovisco Pais
| | - Carlos E. S. Bernardes
- Centro de Química Estrutural
- Departamento de Engenharia Química
- Instituto Superior Técnico
- Universidade de Lisboa
- Avenida Rovisco Pais
| | - Elena I. Lozinskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences (INEOS RAS)
- Vavilov St. 28
- 119991 Moscow
- Russia
| | | | - José N. Canongia Lopes
- Centro de Química Estrutural
- Departamento de Engenharia Química
- Instituto Superior Técnico
- Universidade de Lisboa
- Avenida Rovisco Pais
| | - Isabel M. Marrucho
- Centro de Química Estrutural
- Departamento de Engenharia Química
- Instituto Superior Técnico
- Universidade de Lisboa
- Avenida Rovisco Pais
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33
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Javed F, Ullah F, Zakaria MR, Akil HM. An approach to classification and hi-tech applications of room-temperature ionic liquids (RTILs): A review. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Stolarska O, Soto A, Rodríguez H, Smiglak M. Thermal behaviour of mixtures of 1-alkylpyridinium halides with and without a common ion. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.106] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Shah MUH, Sivapragasam M, Moniruzzaman M, Talukder MMR, Yusup SB, Goto M. Aggregation behavior and antimicrobial activity of a micellar system of binary ionic liquids. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.101] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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36
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Xiao Y, Huang X. The physicochemical properties of a room-temperature liquidus binary ionic liquid mixture of [HNMP][CH 3SO 3]/[Bmim]Cl and its application for fructose conversion to 5-hydroxymethylfurfural. RSC Adv 2018; 8:18784-18791. [PMID: 35539654 PMCID: PMC9080599 DOI: 10.1039/c8ra03604g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 05/17/2018] [Indexed: 11/29/2022] Open
Abstract
Via heating first and then cooling, binary ionic liquid (IL) mixture of N-methyl-2-pyrrolidonium methylsulfonate ([HNMP][CH3SO3]) and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) could form a liquid at room temperature. The glass-transition temperature (T g) characterized by DSC depends on its composition with T g being as low as -63 °C. The physicochemical properties of the binary IL mixtures also vary with the composition. With the increase of the mole fraction of [Bmim]Cl, the hydrogen-bond accepting ability (β) of the binary IL mixture increases, but the hydrogen-bond donating ability (α) deceases. In this binary IL mixture, fructose could be effectively converted into 5-hydroxymethylfurfural (HMF) at room temperature. The HMF yields at a given time are found to be well correlated with the physicochemical properties of the binary mixture, especially the α and β values. Under specified conditions, the present IL mixture as medium for fructose dehydration into HMF is comparable to the medium formed by ILs and alcohol, where the alcohols have negative effect on the HMF formation.
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Affiliation(s)
- Yuyan Xiao
- Key Lab for Colloid and Interface Chemistry of the Education Ministry of China, Shandong University Jinan 250100 P. R. China
| | - Xirong Huang
- Key Lab for Colloid and Interface Chemistry of the Education Ministry of China, Shandong University Jinan 250100 P. R. China
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37
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Rodrigues RDP, de Castro FC, Santiago-Aguiar RSD, Rocha MVP. Ultrasound-assisted extraction of phycobiliproteins from Spirulina (Arthrospira) platensis using protic ionic liquids as solvent. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.02.021] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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38
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Hayano S, Ota K, Ban HT. Syntheses, characterizations and functions of cationic polyethers with imidazolium-based ionic liquid moieties. Polym Chem 2018. [DOI: 10.1039/c7py01985h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cationic polyethers with ionic liquid groups are characterized with deliquescence, ionic conductivity and miscibility in ionic liquid.
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Affiliation(s)
| | - Keisuke Ota
- Zeon Corporation R&D Center
- Kawasaki-city
- Japan
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39
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Toledo Hijo AAC, Maximo GJ, Cunha RL, Fonseca FHS, Cardoso LP, Pereira JFB, Costa MC, Batista EAC, Meirelles AJA. Phase equilibrium and physical properties of biobased ionic liquid mixtures. Phys Chem Chem Phys 2018; 20:6469-6479. [DOI: 10.1039/c7cp06841g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Protic ionic liquid crystals (PILCs) obtained from natural sources are promising compounds due to their peculiar properties and sustainable appeal.
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Affiliation(s)
| | | | | | | | - Lisandro P. Cardoso
- Institute of Physics Gleb Wataghin (IFGW)
- University of Campinas
- Campinas
- Brazil
| | - Jorge F. B. Pereira
- School of Pharmaceutical Sciences
- Universidade Estadual Paulista
- Araraquara
- Brazil
| | - Mariana C. Costa
- School of Chemical Engineering
- University of Campinas
- Campinas
- Brazil
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40
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Mirarabrazi M, Stolarska O, Smiglak M, Robelin C. Solid-liquid equilibria for a pyrrolidinium-based common-cation ternary ionic liquid system, and for a pyridinium-based ternary reciprocal ionic liquid system: an experimental study and a thermodynamic model. Phys Chem Chem Phys 2017; 20:637-657. [PMID: 29227485 DOI: 10.1039/c7cp04678b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The present paper describes an experimental study and a thermodynamic model for the phase diagrams of the common-cation ternary system [C4MPyrr]Cl-[C4MPyrr]Br-[C4MPyrr]BF4 (where [C4MPyrr] refers to 1-butyl-1-methyl-pyrrolidinium) and of the ternary reciprocal system [C2Py], [C4Py]‖Cl, Br (where [CnPy] refers to 1-alkyl-pyridinium). Phase equilibria were measured by Differential Scanning Calorimetry (DSC) for two isoplethal sections in the common-cation pyrrolidinium-based ternary system. Phase diagram measurements were recently performed for the four common-ion binary subsystems and the two diagonal sections in the pyridinium-based ternary reciprocal system. In each case, the Modified Quasichemical Model was used to model the liquid solution, and the Compound Energy Formalism was used for the relevant solid solutions. For the ternary reciprocal system, the missing thermodynamic properties of the pure compounds were assessed using the Volume-based Thermodynamics (VBT) from Glasser and Jenkins, making it possible to estimate the exchange Gibbs free energy for the reaction [C2Py]Br (liquid) + [C4Py]Cl (liquid) = [C2Py]Cl (liquid) + [C4Py]Br (liquid). The experimental diagonal sections [C4Py]Br-[C2Py]Cl and [C4Py]Cl-[C2Py]Br were satisfactorily reproduced using solely the optimized model parameters for the four common-ion binary subsystems.
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Affiliation(s)
- Meysam Mirarabrazi
- Centre for Research in Computational Thermochemistry (CRCT), Department of Chemical Engineering, École Polytechnique, C.P. 6079, Succursale "Downtown", Montreal, Quebec H3C 3A7, Canada.
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41
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Neves CMSS, Silva AMS, Fernandes AM, Coutinho JAP, Freire MG. Toward an Understanding of the Mechanisms behind the Formation of Liquid-liquid Systems formed by Two Ionic Liquids. J Phys Chem Lett 2017; 8:3015-3019. [PMID: 28609628 PMCID: PMC6157719 DOI: 10.1021/acs.jpclett.7b01234] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Biphasic systems composed of aprotic ionic liquids (ILs) allow the development of new separation processes constituted only by nonvolatile solvents. Six pairs of cholinium- and phosphonium-based ILs were found to be able to form biphasic systems, and the respective liquid-liquid phase diagrams were determined. Although IL anions do not seem to control the phase separation phenomenon, they play an important role in defining the size of the biphasic region. A linear dependence of the ILs mutual solubilities with the IL anions volume was found, supporting the relevance of the entropy of mixing. With the exception of the system formed by ILs with a common anion, the remaining liquid-liquid systems display a significant ion exchange extent between the phases, which inversely depends on the ILs cohesive energy. It is finally shown that four-phase systems with a remarkable performance in the separation of mixtures of dyes can be prepared.
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Affiliation(s)
- Catarina M. S. S. Neves
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Ana M. Fernandes
- QOPNA, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - João A. P. Coutinho
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Mara G. Freire
- CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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42
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Keaveney ST, Haines RS, Harper JB. Ionic liquid solvents: the importance of microscopic interactions in predicting organic reaction outcomes. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2016-1008] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIonic liquids are attractive alternatives to molecular solvents as they have many favourable physical properties and can produce different organic reaction outcomes compared to molecular solvents. Thus far, interactions between the ionic liquid components and specific sites (such as charged centres, lone pairs and π systems) on the reagents and transition state have been identified as affecting reaction outcome; a comprehensive understanding of these interactions is necessary to allow prediction of ionic liquid solvent effects. This manuscript summarises our recent progress in the development of a framework for predicting the effect of an ionic liquid solvent on the outcome of organic processes. There will be a particular focus on the importance of the different interactions between the ionic liquid components and the species along the reaction coordinate that are responsible for the changes in reaction outcome observed in the cases described.
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Affiliation(s)
- Sinead T. Keaveney
- School of Chemistry, University of New South Wales, UNSW Sydney 2052, Australia
| | - Ronald S. Haines
- School of Chemistry, University of New South Wales, UNSW Sydney 2052, Australia
| | - Jason B. Harper
- School of Chemistry, University of New South Wales, UNSW Sydney 2052, Australia
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Bruce DW, Cabry CP, Lopes JNC, Costen ML, D'Andrea L, Grillo I, Marshall BC, McKendrick KG, Minton TK, Purcell SM, Rogers S, Slattery JM, Shimizu K, Smoll E, Tesa-Serrate MA. Nanosegregation and Structuring in the Bulk and at the Surface of Ionic-Liquid Mixtures. J Phys Chem B 2017; 121:6002-6020. [PMID: 28459567 DOI: 10.1021/acs.jpcb.7b01654] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ionic-liquid (IL) mixtures hold great promise, as they allow liquids with a wide range of properties to be formed by mixing two common components rather than by synthesizing a large array of pure ILs with different chemical structures. In addition, these mixtures can exhibit a range of properties and structural organization that depend on their composition, which opens up new possibilities for the composition-dependent control of IL properties for particular applications. However, the fundamental properties, structure, and dynamics of IL mixtures are currently poorly understood, which limits their more widespread application. This article presents the first comprehensive investigation into the bulk and surface properties of IL mixtures formed from two commonly encountered ILs: 1-ethyl-3-methylimidazolium and 1-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][Tf2N] and [C12mim][Tf2N]). Physical property measurements (viscosity, conductivity, and density) reveal that these IL mixtures are not well described by simple mixing laws, implying that their structure and dynamics are strongly composition dependent. Small-angle X-ray and neutron scattering measurements, alongside molecular dynamics (MD) simulations, show that at low mole fractions of [C12mim][Tf2N], the bulk of the IL is composed of small aggregates of [C12mim]+ ions in a [C2mim][Tf2N] matrix, which is driven by nanosegregation of the long alkyl chains and the polar parts of the IL. As the proportion of [C12mim][Tf2N] in the mixtures increases, the size and number of aggregates increases until the C12 alkyl chains percolate through the system and a bicontinuous network of polar and nonpolar domains is formed. Reactive atom scattering-laser-induced fluorescence experiments, also supported by MD simulations, have been used to probe the surface structure of these mixtures. It is found that the vacuum-IL interface is enriched significantly in C12 alkyl chains, even in mixtures low in the long-chain component. These data show, in contrast to previous suggestions, that the [C12mim]+ ion is surface active in this binary IL mixture. However, the surface does not become saturated in C12 chains as its proportion in the mixtures increases and remains unsaturated in pure [C12mim][Tf2N].
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Affiliation(s)
- Duncan W Bruce
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Christopher P Cabry
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - José N Canongia Lopes
- Centro de Química Estrutural, IST, Universidade de Lisboa , 1049-001 Lisboa, Portugal.,ITQB, Universidade Nova de Lisboa , Avenida República, 2780-157 Oeiras, Portugal
| | - Matthew L Costen
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, U.K
| | - Lucía D'Andrea
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Isabelle Grillo
- ILL , 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France
| | - Brooks C Marshall
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - Kenneth G McKendrick
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, U.K
| | - Timothy K Minton
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - Simon M Purcell
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, U.K
| | - Sarah Rogers
- ISIS, Science & Technology Facilities Council, Rutherford Appleton Laboratory , OX11 0QX Chilton, U.K
| | - John M Slattery
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Karina Shimizu
- Centro de Química Estrutural, IST, Universidade de Lisboa , 1049-001 Lisboa, Portugal.,ITQB, Universidade Nova de Lisboa , Avenida República, 2780-157 Oeiras, Portugal
| | - Eric Smoll
- Department of Chemistry and Biochemistry, Montana State University , Bozeman, Montana 59717, United States
| | - María A Tesa-Serrate
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, U.K
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Russina O, Lo Celso F, Plechkova NV, Triolo A. Emerging Evidences of Mesoscopic-Scale Complexity in Neat Ionic Liquids and Their Mixtures. J Phys Chem Lett 2017; 8:1197-1204. [PMID: 28234000 DOI: 10.1021/acs.jpclett.6b02811] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Ionic liquids (ILs) represent a blooming class of continuously developing advanced materials, with the aiming of a green chemical industry. Their appealing physical and chemical properties are largely influenced by their micro- and mesoscopic structure that is known to possess a high degree of hierarchical organization. High-impact application fields are largely affected by the complex morphology of neat ionic liquids and their mixtures. This Perspective highlights new arising research directions that point to an enhanced level of structural complexity in several IL-based systems, including mixtures. The latter represent a change in paradigm in the approach to formulate new, task-specific IL-based media, and the reported phenomenology has the potential to further expand their range of applications by calling for a revisitation of the nature of interactions in these exciting media.
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Affiliation(s)
- Olga Russina
- Dipartimento di Chimica, Università di Roma Sapienza , Rome 00185, Italy
| | - Fabrizio Lo Celso
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo , viale delle Scienze, ed. 17, 90128 Palermo, Italy
| | - Natalia V Plechkova
- QUILL, The Queen's University of Belfast , Stranmillis Road, Belfast, Northern Ireland, United Kingdom BT9 5AG
| | - Alessandro Triolo
- Laboratorio Liquidi Ionici, Istituto Struttura della Materia, Consiglio Nazionale delle Ricerche , Rome 00133, Italy
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45
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Mjalli F, Ahmed O. Ethaline and Glyceline binary eutectic mixtures: characteristics and intermolecular interactions. ASIA-PAC J CHEM ENG 2017. [DOI: 10.1002/apj.2074] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- F.S. Mjalli
- Petroleum and Chemical Engineering Department; Sultan Qaboos University; Muscat Oman
| | - O.U. Ahmed
- Petroleum and Chemical Engineering Department; Sultan Qaboos University; Muscat Oman
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Abstract
Vibrational spectroscopy has continued use as a powerful tool to characterize ionic liquids since the literature on room temperature molten salts experienced the rapid increase in number of publications in the 1990's. In the past years, infrared (IR) and Raman spectroscopies have provided insights on ionic interactions and the resulting liquid structure in ionic liquids. A large body of information is now available concerning vibrational spectra of ionic liquids made of many different combinations of anions and cations, but reviews on this literature are scarce. This review is an attempt at filling this gap. Some basic care needed while recording IR or Raman spectra of ionic liquids is explained. We have reviewed the conceptual basis of theoretical frameworks which have been used to interpret vibrational spectra of ionic liquids, helping the reader to distinguish the scope of application of different methods of calculation. Vibrational frequencies observed in IR and Raman spectra of ionic liquids based on different anions and cations are discussed and eventual disagreements between different sources are critically reviewed. The aim is that the reader can use this information while assigning vibrational spectra of an ionic liquid containing another particular combination of anions and cations. Different applications of IR and Raman spectroscopies are given for both pure ionic liquids and solutions. Further issues addressed in this review are the intermolecular vibrations that are more directly probed by the low-frequency range of IR and Raman spectra and the applications of vibrational spectroscopy in studying phase transitions of ionic liquids.
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Affiliation(s)
- Vitor H Paschoal
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Luiz F O Faria
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Mauro C C Ribeiro
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo , Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
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47
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Berton P, Kelley SP, Wang H, Myerson AS, Rogers RD. Separate mechanisms of ion oligomerization tune the physicochemical properties of n-butylammonium acetate: cation-base clusters vs. anion-acid dimers. Phys Chem Chem Phys 2017; 19:25544-25554. [DOI: 10.1039/c7cp04078d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Ions comprising protic ionic liquids strongly interact with their neutral acid and base forms as exemplified by n-butylammonium acetate in the presence of excess n-butylamine or acetic acid.
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Affiliation(s)
- Paula Berton
- Department of Chemistry
- McGill University
- Montreal
- Canada
| | | | - Hui Wang
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Allan S. Myerson
- Novartis-MIT Center for Continuous Manufacturing and Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Robin D. Rogers
- Department of Chemistry
- McGill University
- Montreal
- Canada
- 525 Solutions, Inc
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48
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Teles ARR, Correia H, Maximo GJ, Rebelo LPN, Freire MG, Pereiro AB, Coutinho JAP. Solid-liquid equilibria of binary mixtures of fluorinated ionic liquids. Phys Chem Chem Phys 2016; 18:25741-50. [PMID: 27603428 DOI: 10.1039/c6cp05372f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Within ionic liquids, fluorinated ionic liquids (FILs) present unique physico-chemical properties and potential applications in several fields. However, the melting point of these neoteric compounds is usually higher due to the presence of fluorine atoms. This drawback may be resolved by, for instance, mixing different FILs to create eutectic mixtures. In this work, binary mixtures of fluoro-containing and fluorinated ionic liquids were considered with the aim of decreasing their melting temperatures as well as understanding and characterizing these mixtures and their phase transitions. Five FILs were selected, allowing the investigation of four binary mixtures, each of them with a common ion. Their solid-liquid and solid-solid equilibria were studied by differential scanning calorimetry and the non-ideality of the mixtures was investigated. Overall, a variety of solid-liquid equilibria with systems exhibiting eutectic behavior, polymorphs with solid-solid phase transitions, and the formation of intermediate compounds and solid solutions were surprisingly found. In addition to these intriguing behaviours, novel FILs with lower melting temperatures were obtained by the formation of binary systems, thus enlarging the application range of FILs at lower temperatures.
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Affiliation(s)
- Ana Rita R Teles
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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CO2 solubility in and physical properties for ionic liquid mixtures of 1-butyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.02.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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Higashi T, Ueda T, Mochida T. Effects of substituent branching and chirality on the physical properties of ionic liquids based on cationic ruthenium sandwich complexes. Phys Chem Chem Phys 2016; 18:10041-8. [PMID: 27004435 DOI: 10.1039/c6cp00643d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An appropriate understanding of how substituents affect the physical properties of ionic liquids is important for the molecular design of ionic liquids. Toward this end, we investigated how the branching and chirality of substituents affect the physical properties of organometallic ionic liquids. We synthesized a series of ionic liquids bearing a branched or linear alkoxy group with the same number of carbons: [Ru(C5H5)(η(6)-C6H5OR)]X (rac-[1]X: R = -CH(C2H5)(C6H13), [2]X: R = -CH(C4H9)2, [3]X: R = -C9H19), where X = PF6(-), (SO2F)2N(-), and (SO2CF3)2N(-). rac-[1]X are racemic salts. Salts with less symmetrical substituents tend to maintain the liquid state due to suppression of crystallization; crystallization is completely suppressed in most of the rac-[1]X salts and in some of the [2]X salts, whereas not in [3]X salts. The glass-transition temperatures and viscosities of the salts with branched substituents are greater than those with linear substituents. Chiral resolution of rac-[1][PF6] was performed by chiral chromatography. The melting point of rac-[1][PF6] is much lower than that of the enantiopure salt (chiral-[1][PF6]), which we ascribe to the formation of a conglomerate in the solid state. X-ray structure analysis revealed that the solid salts form layered structures.
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Affiliation(s)
- Tomomi Higashi
- Department of Chemistry, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
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