Solvent properties of liquid organic salts used as mobile phases in microcolumn reversed-phase liquid chromatography

Shetty, Prabhakara H.; Youngberg, Paula; Kersten, Brian R.; Poole, Colin F.

doi:10.1016/s0021-9673(00)93960-8

Cited by 110 publications

(59 citation statements)

References 36 publications

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“…[55] The solvent properties of the ILs have also been investigated by means of chromatographic techniques. [56,57] It is generally found that the ILs may be considered to be polar phases, with the properties being largely determined by the ability of the salt to act as an hydrogen-bonded donor and/ or acceptor. Table 1 lists the hydrogen-bonded donation abilities (HBDA, a) to qualitatively denote the acidity of the ILs.…”

Section: Dementioning

confidence: 99%

Hydrogen Bonds: A Structural Insight into Ionic Liquids

Dong¹,

Zhang²

2012

Chemistry A European J

266

185

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Ionic liquids (ILs) have attracted intensive attention in academia and industry due to their unique properties and potential applications. Nowadays, much interest is focused on finding out what is the main force that determines the properties of ionic liquids. Intuitively like NaCl, in high-temperature molten salt (HTMS) the electrostatic Coulomb force is regarded as the dominant factor that determines the behaviors of ILs. However, a large amount of evidence indicates that such a molten-salt-based simplified explanation is not consistent with the corresponding experimental results. Besides the Coulomb force, the hydrogen bond is another important noncovalent interaction in the IL and is closely related to some important properties and applications, as suggested in some new research results. Therefore in this review, we present results concerning the hydrogen bond in ILs, from the perspective of experiment and calculation, to shed light on its effects and roles. The deep insights into structure, in particular the hydrogen bonds, can provide us with a rational design for the new ILs to fulfill the demands in some complicated chemical processes.

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Section: Dementioning

confidence: 99%

Hydrogen Bonds: A Structural Insight into Ionic Liquids

Dong¹,

Zhang²

2012

Chemistry A European J

266

185

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“…This result is in consistent with the solvation model proposed by Abraham et al (Abraham et al, 2003) indicating that BMIM PF 6 has a greater affinity for electron lone pair interactions. More data for liquid-ionic liquid partition coefficients of different organic compounds were described for the biphasic systems containing alkyl ammonioum ionic liquids: ethylammonium nitrate, n-propylammonium nitrate, or di-n -propylammonium thiocyanate and hexane, toluene, octan-1-ol, or dichloromethane (Poole, 2007;Shetty et al, 1987;Shetty et al, 1990) or aqua biphasic systems formed by 1-butylammonium-3-methylimidazolium hexafluorophosphate and water or heptane ( Berthod & Carda-Broch, 2003;Khachatryn et al, 2005;Carda-Broch et al, 2003) or the 1-octyl-3-methylimidazolium hexafluorophosphate-water biphasic system . IL additives have been also applied as a mobile phase modifiers in RP-HPLC systems used for determination of the chromatographic lipophilicity parameters log k w of ionized forms of basic drugs (Marszałł & Kaliszan, 2007).…”

Section: Lipophilicity Parametersmentioning

confidence: 99%

Ionic Liquids in Separation Techniques

Flieger¹,

Czajkowska-Żelazko²

2011

Applications of Ionic Liquids in Science and Technology

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“…Previously, alkylammonium nitrate and thiocyanate ILs have been characterized with respect to their physical and solvent properties [65,66]. The UV spectra for the nitrate compounds showed a strong absorbance band in the 260 -320 nm region and the thiocyanate solvents were colored yellow, reactive to stainless steel, and quite viscous, about 40 -125 cP.…”

Section: Ils As Organic Solvent Replacements In Lc Mobile Phases At Hmentioning

confidence: 99%

Utility of ionic liquids in analytical separations

Shamsi

Danielson

2007

J of Separation Science

179

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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Solvent properties of liquid organic salts used as mobile phases in microcolumn reversed-phase liquid chromatography

Cited by 110 publications

References 36 publications

Hydrogen Bonds: A Structural Insight into Ionic Liquids

Hydrogen Bonds: A Structural Insight into Ionic Liquids

Ionic Liquids in Separation Techniques

Utility of ionic liquids in analytical separations

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