Structural studies of the phase, aggregation and surface behaviour of 1-alkyl-3-methylimidazolium halide + water mixtures

Goodchild, Ian; Collier, Laura; Millar, Sally; Prokeš, Ivan; Lord, Jason C. D.; Butts, Craig P.; Bowers, James; Webster, John R. P.; Heenan, Richard K.

doi:10.1016/j.jcis.2006.11.034

Cited by 282 publications

(239 citation statements)

References 51 publications

(66 reference statements)

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“…The N agg of [C n mim]Br (n=10,14) in water is in good agreement with the literature values[34,40,41]. It is observed that with addition of glycyl dipeptide to aqueous [C n mim]Br (n=10,14) solution, N agg decreases.…”

supporting

confidence: 89%

Apparent molar volume, conductivity, and fluorescence studies of ternary systems of dipeptides + ionic liquids ([Cnmim]Br, n = 10, 14) + water at different temperatures

et al. 2015

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Densities, conductivities, and fluorescence spectra of two imidazolium ionic liquids ([C n mim]Br, n=10, 14)-glycyl dipeptide-water mixtures were measured as a function of temperature. The density data have been utilized to calculate the apparent molar volumes, standard partial molar volumes (V 2,φ 0 ), standard partial molar volumes of transfer from water to aqueous ionic liquids solutions (Δ t V°), the hydration number (N H ), partial molar expansibility (E φ 0 ), and Hepler's constant of glycyl dipeptides. Through the electrical conductivity measurements, the c cmc values at different temperatures and a series of thermodynamic parameters (ΔG m o , ΔH m o , and ΔS m o ) of micellization of [C n mim]Br (n=10, 14) in aqueous glycyl dipeptides solutions are evaluated. The pyrene fluorescence spectra were used to study the change of micropolarity produced by the interaction of [C n mim]Br with glycyl dipeptide, and the aggregation behavior of [C n mim]Br (n=10, 14). The results shown above have been explained in terms of solutesolvent interactions and structural changes in the mixed solutions. The interaction between [C n mim]Br (n=10, 14) and glycyl dipeptide is affected by temperature and hydrocarbon chain length of the dipeptides.

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confidence: 89%

Apparent molar volume, conductivity, and fluorescence studies of ternary systems of dipeptides + ionic liquids ([Cnmim]Br, n = 10, 14) + water at different temperatures

et al. 2015

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“…Br 2500 [27] 1900 [27] 2316 A C H T U N G T R E N N U N G [C 4 MIm]Br 800 [27] 900 [27] 1025 4 ] 800 [5] 1370 [a] 820 [5] 1153…”

Section: A C H T U N G T R E N N U N G [N 1118 ]Br 225mentioning

confidence: 99%

“…[a] 31 [3] 23 A C H T U N G T R E N N U N G [C 6 MIm]Cl 900 [4] 689 A C H T U N G T R E N N U N G [C 6 MIm]Br 600 [27] 470 [28] 400 [27] 880 [29] 800 [29] 361…”

Section: A C H T U N G T R E N N U N G [C 4 Mim]a C H T U N G T R E Nmentioning

confidence: 99%

Predicting the Critical Micelle Concentrations of Aqueous Solutions of Ionic Liquids and Other Ionic Surfactants

Preiss

Jungnickel

Thöming

et al. 2009

Chemistry A European J

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Some ionic liquids (ILs) are structurally analogous to surfactants, especially those that consist of a combination of organic and inorganic ions. The critical micelle concentration (CMC) is a basic parameter of surface chemistry and colloid science. A significant amount of research has already been carried out to determine the CMCs of ILs. However, because of the many varied cation/anion combinations, it is a daunting task to measure the CMCs of all possible ILs. Herein we suggest a general rule for predicting the CMCs of ionic surfactants in water based on data from COSMO-RS calculations. In accordance with the Stauff-Klevens rule, the molecular volume (V(m)) is sufficient to describe similar homologous series of cationic surfactants such as imidazolium- and ammonium-based ionic liquids with varying side-chain lengths. However, to also include anionic surfactants like Na[C(n)SO(4)] in a more general correlation, V(m) has to be exchanged by the cubed molecular radius (r3(m)) and the molecular surface has to be used as an additional descriptor. Furthermore, to describe double amphiphilic compounds like [C(4)MIm][C(8)SO(4)], the enthalpies of mixtures calculated by COSMO-RS have to be taken into account. The resulting equation had allowed us to predict the CMCs of all of the 36 tested surfactants with an error similar to or smaller than the usual experimental errors (18 different cations, 10 different anions: root mean squared error (rmse)=0.191 logarithmic units; R(2)=0.994). We discuss the factors governing micelle formation on the basis of our calculations and show that the structure of our equation can be related to Gibbs' theory of crystallization.

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“…The volumetric and acoustic properties of electrolytic and nonelectrolytic solutions have proved particularly informative in elucidating the solute-solute and solute-solvent interactions. In spite of their importance, there is limited information on the thermodynamic properties of 1-alkyl-3-methylimidazolium bromide in aqueous or nonaqueous solutions [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. As a continuation of our previous study [31] on the thermodynamic properties of the 1-alkyl-3-methylimidazolium bromide solutions, we report here new density and speed-of-sound measurements on mixtures of 1-propyl-3-methylimidazolium bromide ([C 3 mim][Br]) with acetonitrile (MeCN), dimethylformamide (DMF), and dimethylsulfoxide (DMSO) over the range of temperature from 288.15 K to 308.15 K at 5 K intervals in the dilute concentration region.…”

mentioning

confidence: 99%

Volumetric and Isentropic Compressibility Behavior of Ionic Liquid, 1-Propyl-3-Methylimidazolium Bromide in Acetonitrile, Dimethylformamide, and Dimethylsulfoxide at T = (288.15 to 308.15) K

2009

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Density and speed-of-sound data for 1-propyl-3-methylimidazolium bromide ([C 3 mim][Br]) + acetonitrile (MeCN), [C 3 mim][Br] + dimethylformamide (DMF), and [C 3 mim][Br] + dimethylsulfoxide (DMSO) binary mixtures in the dilute concentration region are reported at T = (288.15 to 308.15) K. From these data, apparent molar volume, isentropic compressibility, excess molar volume, and isentropic compressibility deviation values have been calculated. Negative deviations from the ideal behavior of both molar volume and isentropic compressibility have been observed for all systems investigated in this study. It has been found that deviations from ideal behavior for the [C 3 mim][Br] + MeCN system are larger than those for the [C 3 mim][Br] + DMF system which, in turn, are larger than those for the [C 3 mim][Br] + DMSO system. The results have been interpreted in terms of ion-dipole interactions and structural factors of the ionic liquid and investigated organic solvents.

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Structural studies of the phase, aggregation and surface behaviour of 1-alkyl-3-methylimidazolium halide + water mixtures

Cited by 282 publications

References 51 publications

Apparent molar volume, conductivity, and fluorescence studies of ternary systems of dipeptides + ionic liquids ([Cnmim]Br, n = 10, 14) + water at different temperatures

Apparent molar volume, conductivity, and fluorescence studies of ternary systems of dipeptides + ionic liquids ([Cnmim]Br, n = 10, 14) + water at different temperatures

Predicting the Critical Micelle Concentrations of Aqueous Solutions of Ionic Liquids and Other Ionic Surfactants

Volumetric and Isentropic Compressibility Behavior of Ionic Liquid, 1-Propyl-3-Methylimidazolium Bromide in Acetonitrile, Dimethylformamide, and Dimethylsulfoxide at T = (288.15 to 308.15) K

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