Solute-solvent interactions in liquid alkylammonium 4-toluenesulfonate salts studied by gas chromatography

Furton, Kenneth G.; Poole, Colin F.

doi:10.1021/ac00135a021

Cited by 37 publications

(17 citation statements)

References 30 publications

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“…Poole's group was largely responsible for the introduction and characterization of the first generation of ionic liquids (which they called liquid organic salts) suitable for gas chromatography and for the studies of their fundamental properties aimed at answering the above questions. These ionic liquids were mainly alkylammonium and alkylphosphonium salts with weak nucleophilic anions (Table 1), a number of which had liquid temperature ranges that exceeded 100°C (Table 2) 9–17. The liquid temperature range for an organic salt depends on its melting point or glass transition temperature at the low end and the decomposition temperature or volatility of the ionic liquid at the high end of the temperature scale.…”

Section: Packed Columnsmentioning

confidence: 99%

Ionic liquid stationary phases for gas chromatography

Poole

2011

J of Separation Science

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208

108

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This article provides a summary of the development of ionic liquids as stationary phases for gas chromatography beginning with early work on packed columns that established details of the retention mechanism and established working methods to characterize selectivity differences compared with molecular stationary phases through the modern development of multi-centered cation and cross-linked ionic liquids for high-temperature applications in capillary gas chromatography. Since there are many reviews on ionic liquids dealing with all aspects of their chemical and physical properties, the emphasis in this article is placed on the role of gas chromatography played in the design of ionic liquids of low melting point, high thermal stability, high viscosity, and variable selectivity for separations. Ionic liquids provide unprecedented opportunities for extending the selectivity range and temperature-operating range of columns for gas chromatography, an area of separation science that has otherwise been almost stagnant for over a decade.

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Section: Packed Columnsmentioning

confidence: 99%

Ionic liquid stationary phases for gas chromatography

Poole

2011

J of Separation Science

Self Cite

208

108

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“…Variation of the IL anion has also been considered [29]. The use of alkylammonium-thiocyanates [30] or -4-toluenesulfonates [31] GC stationary phases showed retention of proton donor solutes such as alcohols is influenced by the basicity of the cation. The organic portion of the anion for tetrabutyl ammonium sulfonate salts seems to affect the magnitude of the solute proton acceptor interactions [32,33].…”

Section: Ils As Standard-coated Gc Stationary Phasesmentioning

confidence: 99%

Utility of ionic liquids in analytical separations

Shamsi

Danielson

2007

J of Separation Science

178

103

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Ionic liquids (ILs), as separation media, have made significant contributions in the past decades in advancing research in gas chromatography (GC), liquid chromatography (LC), and capillary electrophoresis (CE). This review, covering reports published from the mid 1980s to early 2007, shows how ILs have been used so far in separation science, originally primarily as GC stationary phases and later as mobile phase additives (both millimolar and major percent levels) for LC and CE. Representative GC and LC chromatograms as well as CE electropherograms are shown. In addition, the very recent findings on the development of ionic liquids with surfactant properties and its applications for chiral and achiral analysis are discussed.

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“…1,2 One may count the use of tetraalkylammonium halides with organic diluents for the extraction of metal ions in the 1960s and 1970s 3,4 among such attempts. The number of papers published in this area was limited to a few [5][6][7][8][9][10][11][12] before room-temperature ionic liquids with moderately hydrophobic anions were introduced in the 1990s; 13,14 since then, however, the research on ionic liquids has been burgeoning, particularly after the turn of the century. More than a dozen review articles dealing with the application of ILs to analytical chemistry have appeared in the last five years.…”

Section: Introductionmentioning

confidence: 99%

Mutual Solubility of Hydrophobic Ionic Liquids and Water in Liquid-Liquid Two-phase Systems for Analytical Chemistry

Kakiuchi

2008

ANAL. SCI.

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Liquid-liquid two-phase systems formed by a hydrophobic ionic liquid and water find several useful ways of application in analytical chemistry. One of the most important properties of such two-phase systems is the mutual solubility of the IL and water. Recent advancements on this subject have been reviewed. The solubility of ionic liquids in water is related to the standard Gibbs energies of the transfer of ions constituting the ionic liquid from the ionic liquid phase to water. Although this single ionic property cannot be measured thermodynamically and also varies from one ionic liquid to another, the standard Gibbs energy of the ion transfer from a polar aprotic solvent, such as nitrobenzene and 1,2-dichloroethane, to water is a convenient measure for it. The solubility of an ionic liquid in water and the electrochemical properties at the interface between the two phases are intimately related with each other.

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Solute-solvent interactions in liquid alkylammonium 4-toluenesulfonate salts studied by gas chromatography

Abstract: The gas chromatographic properties of 18 alkylammonium 4-toluenesulfonate salts having stable liquid ranges of 34 to 145 °C above their melting points are described. In most

Cited by 37 publications

References 30 publications

Ionic liquid stationary phases for gas chromatography

Ionic liquid stationary phases for gas chromatography

Utility of ionic liquids in analytical separations

Mutual Solubility of Hydrophobic Ionic Liquids and Water in Liquid-Liquid Two-phase Systems for Analytical Chemistry

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