Aqueous solutions of ionic liquids. Description of osmotic coefficients within the Binding Mean Spherical Approximation

Papaïconomou, Nicolas; Simonin, Jean‐Pierre; Bernard, Olivier

doi:10.1016/j.jct.2015.07.007

Cited by 5 publications

(3 citation statements)

References 40 publications

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“…In the model developed by Papaiconomou et al 283 based on the BiMSA, the IL was described as being weakly associated, the association constant was set as an adjustable parameter, and the osmotic coefficient was used in parameter fitting. The studied ILs are [ In modelling, the IL was completely dissociated into cations and anions, and the mean spherical approximation (MSA) was used to describe the longrange ion-ion interactions.…”

Section: Aqueous Ilsmentioning

confidence: 99%

The peculiar effect of water on ionic liquids and deep eutectic solvents

et al. 2018

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Section: Aqueous Ilsmentioning

confidence: 99%

The peculiar effect of water on ionic liquids and deep eutectic solvents

et al. 2018

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“…This version of BiMSA (which is also called BIMSA-EXP) has been extensively used for estimation of the properties of real electrolyte solutions. Simonin and his co-workers in series of publications used the BiMSA for various aqueous solutions using a concentration dependent relative permittivity and cation's diameter [52][53][54][55][56][57][58][59][60][61][62] .…”

Section: Introductionmentioning

confidence: 99%

Binding Debye–Hückel theory for associative electrolyte solutions

Naseri Boroujeni,

Maribo-Mogensen,

Liang

et al. 2023

The Journal of Chemical Physics

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This study presents a new equation of state (EOS) for charged hard sphere fluids that incorporates ion-ion association. The EOS is developed using the Debye–Hückel (DH) theory, reference cavity approximation, and Wertheim’s theory. Predictive accuracy is evaluated by comparing the model’s predictions with Monte Carlo simulations for various charged hard-sphere fluids. The assessment focuses on mean ionic activity coefficient, individual ionic activity coefficient, and osmotic coefficients. The results demonstrate good agreement between the model and simulations, indicating its success for different electrolyte systems. Incorporating ion-ion association improves accuracy compared to the DH theory. The importance of the cavity function and ion-dipole interactions is emphasized in accurately representing structural properties. Overall, the developed EOS shows promising predictive capabilities for charged hard sphere fluids, providing validation and highlighting the significance of ion-ion association in thermodynamic predictions of electrolyte solutions.

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“…[7][8][9][10][11] It is noteworthy that a significant portion of research pertaining to the physicochemical properties of ILs has predominantly focused on ammonium, imidazolium (IM), pyridinium, and pyrrolidinium-based derivatives. 12,13,[13][14][15][16][17][18][19] These ILs have played a pivotal role in diverse chemical and industrial operations, yielding insights into areas such as separation science, materials engineering, CO 2 capture, biomass conversion, and catalysis. [7][8][9][10][11] While most ILs demonstrate hydrophilic characteristics, even hydrophobic variants have been ob-served to exhibit water absorption when exposed to atmospheric conditions.…”

Section: Introductionmentioning

confidence: 99%

Ionic Pairing and Selective Solvation of Butylmethylimidazolium Chloride Ion Pair in DMSO-Water Mixtures: A Comprehensive Examination via Molecular Dynamics Simulations and Potentials of Mean Force Analysis

Meti,

Srivastava,

Srivastava

et al. 2023

Preprint

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Chloride-based ionic liquids, exemplified by 1-butyl-3-methylimidazolium chloride (BMIM+ − Cl−), possess the capacity to dissolve cellulose, a predominant constituent of biomass. However, their inherently high viscosity poses a hindrance to efficient biomass dissolution for biofuel production. An intriguing solution emerges through the utilization of chloride-based ionic liquids in combination with solvents like water and DMSO, offering a promising avenue to reduce ionic liquid viscosity and enhance the efficacy of biomass dissolution. Utilizing constrained molecular dynamics simulations, we have conducted an extensive exploration of the potentials of mean force (PMFs) governing the behavior of the 1-butyl-3-methylimidazolium chloride (BMIM+ − Cl−) ion pair within dimethyl sulfoxide (DMSO)-water mixtures. Analysis of the BMIM+ − Cl− ion pair PMFs has revealed a noteworthy trend: with increasing DMSO mole fraction, there is a conspicuous augmentation in the depths of the minima associated with both the contact ion pair (CIP) and the solvent-assisted ion pair (SAIP). Notably, the CIP minimum exhibits a more pronounced increment relative to the SAIP minimum. This compelling observation underscores the heightened thermodynamic favorability of ion pairing as the DMSO mole fraction elevates. The credibility of the PMFs is corroborated through the meticulous computation of ion pair residence times for various inter-ionic separations. Thermodynamic assessments discern an intriguing trend: within the range of DMSO mole fractions (xDMSO) spanning 0.10, 0.21, 0.35, and 0.48, the stabilization of both CIPs and SAIPs is driven by entropy. In contrast, for xDMSO values of 0.0, 0.91, and 1.00, enthalpy plays a pivotal role in stabilizing the CIP and SAIP states. Further insights emerge from the meticulous analysis of radial distribution functions (RDFs) characterizing the arrangement of water and DMSO molecules surrounding the BMIM+ − Cl− ion pair. This scrutiny reveals the propensity of water molecules to form hydrogen bonds with the chloride ion, while DMSO molecules preferentially engage in hydrogen bonding with the BMIM+ ion, both within the CIP and SAIP states. Re- markably, water emerges as the preferred solvent for the solvation of the BMIM+− Cl− ion pair, superseding the affinity of DMSO. A notable transition surfaces as the DMSO mole fraction transitions from 1.0 to 0.91, resulting in a pronounced diminishment in the stability of both CIP and SAIP states, attributed to a substantial amplification in the local water density. Significantly, the preferential binding coefficients (γ) values for DMSO consistently show negativity, indicating its preferential exclusion from the BMIM+ − Cl− ion pair in DMSO-water mixtures. The calculated decay times for the survival probabilities of water and dimethyl sulfoxide (DMSO) molecules in the vicinity of the BMIM+ − Cl− ion pair suggest that the water cluster surrounding the Cl− ion exhibits greater stability compared to the DMSO cluster around the Cl− ion, while conversely, the trend is reversed for the BMIM+ ion. These findings advance our understanding of ion pairing kinetics in DMSO-water mixtures, providing valuable insights applicable to a wide spectrum of endeavors, notably including the incorporation of BMIM+ − Cl− ionic liquids in the conversion of biomass into biofuels.

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Aqueous solutions of ionic liquids. Description of osmotic coefficients within the Binding Mean Spherical Approximation

Cited by 5 publications

References 40 publications

The peculiar effect of water on ionic liquids and deep eutectic solvents

The peculiar effect of water on ionic liquids and deep eutectic solvents

Binding Debye–Hückel theory for associative electrolyte solutions

Ionic Pairing and Selective Solvation of Butylmethylimidazolium Chloride Ion Pair in DMSO-Water Mixtures: A Comprehensive Examination via Molecular Dynamics Simulations and Potentials of Mean Force Analysis

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