Aggregation behavior in water of new imidazolium and pyrrolidinium alkycarboxylates protic ionic liquids

Anouti, Mérièm; Jones, Jennifer; Boisset, Aurélien; Jacquemin, Johan; Caillon-Caravanier, Magaly; Lemordant, Daniel

doi:10.1016/j.jcis.2009.07.061

Cited by 112 publications

(137 citation statements)

References 42 publications

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“…[4][5][6]16 Furthermore, the nature of ions affects strongly the rheological behavior and in fact the viscosity of the PILs. For example, the pyrrolidinium octanoate-based PIL is Newtonian (at 298.15 K; η = 36.5 mPa 3 s), 41 but by changing the cation, as reported herein, to the [DIPEA] þ cation, the PIL becomes less viscous but non-Newtonian (at 298.15 K; η 0 = 13.52 mPa 3 s). Furthermore, Anouti et al 39,40 have reported Newtonian behaviors in the case of [DIPEA] þ -based PILs with formate (at 298.15 K; η = 18.0 mPa 3 s) and acetate (at 298.15 K; η = 54.4 mPa 3 s) anions.…”

Section: Rheological Properties Of Selected Pils and Mixturessupporting

confidence: 51%

“…5 In the case of PILs, the nature of the anion also has a large effect; for example, 1-methylimidazolium-based PILs constituted of the lactate or the bis(trifluoromethylsulfonyl)imide anions have a density close to [4][5][6] When increasing the alkyl chain length on the cation, the PIL's density decreases; for example, it was reported that densities of lactate-based PILs constituted of alkylimidazolium cations, denoted [C n Im] þ with n from (1 to 10), range from (1.1230 to 0.9910) g 3 cm -3 at 298.15 K. 16 Furthermore, a similar trend was observed when increasing the alkyl chain length on the anion; for example, imidazolium-and pyrrolidiniumbased PILs having carboxylate anions, denoted [C m COO] -with m from (5 to 8), have densities ranging from (1.0256 to 0.9690) g 3 cm -3 and from (0.9880 to 0.9315) g 3 cm -3 at 298.15 K, respectively. 41 Density measurements of selected pure liquids were carried out at 298.15 K at 0.1 MPa. The experimental data obtained are reported in Table 2 for all the pure compounds studied.…”

Section: ' Introductionmentioning

confidence: 99%

“…Such a trend is in good agreement with the variation in density with the PIL structure previously reported. Furthermore, the nature of the cation affects strongly the density of the PILs; for example, heptanoatebased PILs composed with imidazolium, 41 pyrrolidinium, 41 and [DIPEA] þ cations have a density of (1.0037, 0.9721, and 0.8665) g 3 cm -3 at 298.15 K, respectively. In other words, [DIPEA] þ -based PILs have a lower density than those composed with traditional cation (like imidazolium or pyrrolidinium) based PILs.…”

Section: ' Introductionmentioning

confidence: 99%

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Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Jacquemin

Anouti²,

Lemordant³

2011

J. Chem. Eng. Data

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General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. ABSTRACT: New protic ionic liquids (PILs) based on the diisopropyl-ethylammonium cation have been synthesized through a simple and atom-economic neutralization reaction between the diisopropyl-ethylamine and selected carboxylic acid. Densities and rheological properties were then measured for two original diisopropyl-ethylammonium-based protic ionic liquids (heptanoate and octanoate) at 298.15 K and atmospheric pressure. The effect of the presence of water or acetonitrile on the measured values was also examined over the whole composition range at 298.15 K and atmospheric pressure. From these values, excess properties were calculated and correlated by using a Redlich-Kister-type equation. Finally, a qualitative analysis of the evolution of studied properties with the alkyl chain length of the anion and with the presence or not of water (or acetonitrile) was performed. From this analysis, it appears that selected PILs and their mixtures with water or acetonitrile have a non-Newtonian shear thickening behavior, and the addition of water or acetonitrile on these PILs increases this phenomena by the formation of aggregates in these media.

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Section: Rheological Properties Of Selected Pils and Mixturessupporting

confidence: 51%

Section: ' Introductionmentioning

confidence: 99%

Section: ' Introductionmentioning

confidence: 99%

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Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Jacquemin

Anouti²,

Lemordant³

2011

J. Chem. Eng. Data

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“…The synthesis and physicochemical properties of imidazolium octanoate are reported by our group in a previous paper. 35 Its synthesis has been resumed as following:…”

Section: Methodsmentioning

confidence: 99%

“…35 To continue this work, we present herein thermodynamic and transport properties of imidazolium octanoate in molecular solvents.…”

Section: Introductionmentioning

confidence: 99%

Volumetric Properties, Viscosities, and Isobaric Heat Capacities of Imidazolium Octanoate Protic Ionic Liquid in Molecular Solvents

2010

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Densities (F), viscosities (η), and isobaric heat molar capacities (C p ) of binary mixtures containing imidazolium octanoate, [Im][C 7 CO 2 ], a protic ionic liquid (PIL), with four molecular solvents, water, acetonitrile, ethanol, and 1-octanol, are determined as a function of temperature from (298.15 to 323.15) K and within the whole composition range at atmospheric pressure. Excess molar volumes, V E , excess molar heat capacities, C p E , and the deviation from additivity rules of viscosities, ∆η, of imidazolium octanoate solutions were then deduced from the experimental results, as well as apparent molar volumes, V φi , and partial molar volumes, V j m,i . Results are discussed according to the nature of the interaction between the PIL and the molecules and the effect of temperature. The excess Gibbs energies of activation of viscous flow (∆G *E ) for these systems were then calculated at 298.15 K. The excess isobaric heat capacities, C p E , of binary ([Im][C 7 CO 2 ] + solvent) systems, depend also of the nature of the molecular solvent in mixture. The excess properties were then correlated, at each temperature, as a function of composition by a Redlich-Kister-type equation. Finally results have been discussed in terms of molecular interactions and molecular structures in these binary mixtures, and thermodynamic properties of investigated binary mixtures were then compared to literature values together to investigate the impact of the nature of the solvent on these reported properties.

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Fluorescence Spectroscopy to Probe Ionic Liquid‐Based Systems

Pandey

Trivedi

Pandey³

2018

Encyclopedia of Analytical Chemistry

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Owing to its inherent sensitivity coupled with multidimensionality, fluorescence spectroscopy has established itself as a versatile tool to investigate complex chemical systems in analytical chemistry. Ionic liquids, for the last couple of decades or so, have emerged as intriguing modern materials in science and technology that display an array of useful and sometimes unconventional features. Steady‐state fluorescence intensity and anisotropy and time‐resolved excited‐state emission intensity and anisotropy decays along with other advanced fluorescence techniques have been employed effectively to analyze, characterize, and explore ionic liquids and ionic liquid‐based systems. The extent of dipolarity afforded by ionic liquids as well as cosolvent/supercritical fluid‐added ionic liquid systems is readily manifested through the response of judiciously selected fluorescence polarity probes. Transient solvation measurements carried out by means of time‐resolved fluorescence measurements are particularly powerful for their ability to parameterize the kinetics of the solvation process within ionic liquids. Dynamic Stokes' shift of appropriate fluorescence probes reveals the presence of several components, thus highlighting the complexity of solvation within ionic liquids and ionic liquid‐based media. Various fluorescence spectroscopic tools are used to establish and characterize macromolecular (surfactant and polymer) and dye aggregation within ionic liquids and ionic liquid‐based media along with aggregation of surface‐active ionic liquids (SAILs) in water.

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Aggregation behavior in water of new imidazolium and pyrrolidinium alkycarboxylates protic ionic liquids

Cited by 112 publications

References 42 publications

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Volumetric Properties, Viscosities, and Isobaric Heat Capacities of Imidazolium Octanoate Protic Ionic Liquid in Molecular Solvents

Fluorescence Spectroscopy to Probe Ionic Liquid‐Based Systems

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