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Kimura Y, Akai R, Shimada K, Hirata M, Fujii K, Endo T. Anomalous Dependence of Translational Diffusion on the Water Mole Fraction for Solute Molecules Dissolved in a 1-Butyl-3-methylimidazolium Tetrafluoroborate/Water Mixture. J Phys Chem B 2023. [PMID: 37310854 DOI: 10.1021/acs.jpcb.3c01978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Translational diffusion coefficients of carbon monoxide (CO), diphenylacetylene (DPA), and diphenylcyclopropenone (DPCP) were determined in mixtures of 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim]BF4) and water using transient grating spectroscopy at different mole fractions of water (xw). While DPA exhibited a larger diffusion coefficient than DPCP at low water mole fractions (xw < 0.7), as observed for conventional liquids and ionic liquids (ILs), it was smaller at high mole fractions (xw > 0.9). The apparent molecular radius of DPA determined using the Stokes-Einstein equation at xw > 0.9 is close to the radius of an IL cluster in a water pool as determined from small-angle neutron scattering experiments (J. Bowers et al., Langmuir, 2004, 20, 2192-2198), suggesting that the DPA molecules are trapped in IL clusters in the water pool and move together. The solvation state of DPCP in the mixture was studied using Raman spectroscopy. Dramatically strong water/DPCP hydrogen bonding was observed at higher water mole fractions, suggesting that DPCP is located near the cluster interfaces. The large diffusion coefficient of DPCP suggests that hopping of DPCP between IL clusters occurs through hydrogen bonding with water.
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Affiliation(s)
- Yoshifumi Kimura
- Division of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe 610-0321, Kyoto, Japan
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe-City 610-0321, Kyoto, Japan
| | - Rie Akai
- Division of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe 610-0321, Kyoto, Japan
| | - Kohei Shimada
- Department of Applied Chemistry, Graduate School of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe-City 610-0321, Kyoto, Japan
| | - Mizuki Hirata
- Division of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe 610-0321, Kyoto, Japan
| | - Kaori Fujii
- Division of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe 610-0321, Kyoto, Japan
| | - Takatsugu Endo
- Division of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, 2-1, Tatara Miyakodani, Kyotanabe 610-0321, Kyoto, Japan
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Ionela CHERECHEŞ E, IBANESCU C, DANU M, Adriana MINEA A. Studies on rheological properties and isobaric heat capacity of ZnO - [C4mim][BF4] nanoparticle enhanced ionic liquid. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Minea AA, Cherecheş EI. State of the art on the development of 1-Butyl-3-methylimidazolium tetrafluoroborate ionic liquid and its nanocolloids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Baca KR, Broom DP, Roper MG, Benham MJ, Shiflett MB. First Measurements for the Simultaneous Sorption of Difluoromethane and Pentafluoroethane Mixtures in Ionic liquids Using the Integral Mass Balance Method. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kalin R. Baca
- Institute for Sustainable Engineering, 1536 W. 15th Street, Lawrence, Kansas 66045, United States
- Department of Chemical and Petroleum Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, Kansas 66045, United States
| | - Darren P. Broom
- Hiden Isochema Ltd, 422, Europa Boulevard, Warrington, United Kingdom WA5 7TS
| | - Mark G. Roper
- Hiden Isochema Ltd, 422, Europa Boulevard, Warrington, United Kingdom WA5 7TS
| | - Michael J. Benham
- Hiden Isochema Ltd, 422, Europa Boulevard, Warrington, United Kingdom WA5 7TS
| | - Mark B. Shiflett
- Institute for Sustainable Engineering, 1536 W. 15th Street, Lawrence, Kansas 66045, United States
- Department of Chemical and Petroleum Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, Kansas 66045, United States
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Density, viscosity and electrical conductivity of four amino acid based ionic liquids derived from L-Histidine, L-Lysine, L-Serine, and Glycine. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chen Y, Peng B, Kontogeorgis GM, Liang X. Machine learning for the prediction of viscosity of ionic liquid–water mixtures. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118546] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chang TM, Billeck SE. Structure, Molecular Interactions, and Dynamics of Aqueous [BMIM][BF 4] Mixtures: A Molecular Dynamics Study. J Phys Chem B 2021; 125:1227-1240. [PMID: 33497566 DOI: 10.1021/acs.jpcb.0c09731] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecular dynamics simulations with many-body polarizable force fields were carried out to investigate the thermodynamic, structural, and dynamic properties of aqueous solutions of 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]). The radial distribution functions exhibit well-defined features, revealing favored structural correlations between [bmim]+, [BF4]-, and H2O. The addition of water is shown to alter ionic liquid structural organizations by replacing counterions in the coordination shells and disrupt the cation-anion network. At low water concentration, the majority of water molecules are isolated from each other and have lower average dipole moment than that in pure water. With increasing hydration level, while [bmim][BF4] ionic network breaks up and becomes isolated ion pairs or free ions in the dilute limit, water begins to form clusters of increasing sizes and eventually forms a percolating network. As a result, the average water dipole moment increases and approaches its bulk value. Water is also observed to have a substantial influence on the dynamics of ionic liquids. At low water content, the cation and anion have similar diffusion coefficients due to the correlated ionic motion of long-lived ion pairs. As the water concentration increases, both ions exhibit greater mobility and faster rotations from the breakup of ionic network. Consequently, the ionic conductivity of [bmim][BF4] aqueous solutions rises with increasing water composition.
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Affiliation(s)
- Tsun-Mei Chang
- Department of Chemistry, University of Wisconsin-Parkside, Kenosha, Wisconsin 53141, United States
| | - Stephanie E Billeck
- Department of Chemistry, University of Wisconsin-Parkside, Kenosha, Wisconsin 53141, United States
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Morais ARC, Harders AN, Baca KR, Olsen GM, Befort BJ, Dowling AW, Maginn EJ, Shiflett MB. Phase Equilibria, Diffusivities, and Equation of State Modeling of HFC-32 and HFC-125 in Imidazolium-Based Ionic Liquids for the Separation of R-410A. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02820] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana Rita C. Morais
- Department of Chemical & Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Abby N. Harders
- Department of Chemical & Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
- Institute for Sustainable Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Kalin R. Baca
- Department of Chemical & Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
- Institute for Sustainable Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Greta M. Olsen
- Department of Chemical & Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
- Institute for Sustainable Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Bridgette J. Befort
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Alexander W. Dowling
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Edward J. Maginn
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mark B. Shiflett
- Department of Chemical & Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045, United States
- Institute for Sustainable Engineering, University of Kansas, Lawrence, Kansas 66045, United States
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Sarkoohaki B, Karimkhani M, Almasi M, Najafloo A, Mansouri S. Density and Viscosity for Binary Mixtures of the Ionic Liquid 1-Butyl-3-methylimidazolium Tetrafluoroborate with 2-Propanol, N,N-Dimethylacetamide and N,N-Dimethylformamide at 293.15–323.15 K: Experimental and PC-SAFT Modeling. J SOLUTION CHEM 2020. [DOI: 10.1007/s10953-020-00967-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Li J, Zhu H, Peng C, Liu H. Densities and viscosities for ionic liquids [BMIM][BF4] and [BMIM][Cl] and their binary mixtures at various temperatures and atmospheric pressure. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.04.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ma C, Laaksonen A, Liu C, Lu X, Ji X. The peculiar effect of water on ionic liquids and deep eutectic solvents. Chem Soc Rev 2018; 47:8685-8720. [PMID: 30298877 DOI: 10.1039/c8cs00325d] [Citation(s) in RCA: 225] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ionic liquids (ILs) and deep eutectic solvents (DESs) have been suggested as eco-friendly alternatives to organic solvents. A trace amount of water is often unavoidable as impurity, and water is also added on purpose to reduce their problematically high viscosity and lower their high price. Understanding the distinct effects of water on the properties of ILs/DESs is highly important. In this review, we collect published experimental and theoretical results for IL/DES-H2O systems at varied water concentrations and analyze them. Results from mechanistic studies, thermodynamic modelling and advanced experiments are collected and critically discussed. Six commonly studied IL/DES-H2O systems were selected to map experimental observations onto microscopic results obtained in mechanistic studies. A great variety of distinct contours of the excess properties can be observed over the entire compositional range, indicating that the properties of IL/DES-H2O systems are highly unpredictable. Mechanistic studies clearly demonstrate that the added H2O rapidly changes the heterogeneous 3D structures of pure ILs/DESs, leading to very different properties and behaviour. There are similarities between aqueous electrolytes and IL/DES solutions but the bulky and asymmetric organic cations in ILs/DESs do not conform to the standard salt dissolution and hydration concepts. Thermodynamic modelling previously assumes ILs/DESs to be either a neutral ion-pair or completely dissociated ions, neglecting specific ion hydration effects. A new conceptual framework is suggested for thermodynamic modelling of IL/DES-H2O binary systems to enable new technologies for their practical applications.
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Affiliation(s)
- Chunyan Ma
- Energy Engineering, Division of Energy Science, Luleå University of Technology, Luleå, 971 87, Sweden.
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Kausteklis J, Aleksa V, Iramain MA, Brandán SA. Effect of cation-anion interactions on the structural and vibrational properties of 1-buthyl-3-methyl imidazolium nitrate ionic liquid. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.100] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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