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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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High-Performance Liquid Chromatography: Introduction01:11

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
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Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
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Chirality02:25

Chirality

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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
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Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

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Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
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Analyte Adsorption and Distribution01:09

Analyte Adsorption and Distribution

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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Chiral Ionic Liquids: Structural Diversity, Properties and Applications in Selected Separation Techniques.

Jolanta Flieger1, Joanna Feder-Kubis2, Małgorzata Tatarczak-Michalewska1

  • 1Department of Analytical Chemistry, Medical University of Lublin, 20-093 Lublin, Poland.

International Journal of Molecular Sciences
|June 19, 2020
PubMed
Summary

Chiral ionic liquids (CILs) offer versatile, eco-friendly solutions for separating enantiomers. Their diverse structures enable applications in chromatography and extraction, meeting pharmaceutical and food industry demands.

Keywords:
ammonium saltschiral ionic liquidschromatographyenantioseparationextractionimidazolium saltstunable physicochemical properties

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Area of Science:

  • Green Chemistry
  • Separation Science
  • Materials Science

Background:

  • Ionic liquids (ILs) are tunable ionic compounds with applications as solvents and catalysts.
  • Chiral ionic liquids (CILs), a subset of ILs, are gaining traction for enantiomeric separation.
  • The demand for enantiomerically pure compounds drives innovation in CIL development.

Purpose of the Study:

  • To review the structural diversity and properties of chiral ionic liquids.
  • To highlight applications of CILs in chiral recognition and separation techniques.
  • To underscore the potential of CILs as sustainable chiral selectors and solvents.

Main Methods:

  • Literature review of CIL synthesis and applications.
  • Analysis of CILs as chiral stationary phases in chromatography.
  • Examination of CILs in various extraction techniques (liquid-liquid, solid-phase, etc.).

Main Results:

  • CILs exhibit high molecular diversity, enabling tailored chiral recognition.
  • Successful applications demonstrated in liquid chromatography and countercurrent chromatography.
  • Various CIL-based extraction systems show promise for enantiomer separation.

Conclusions:

  • Chiral ionic liquids represent a promising area for developing novel chiral materials.
  • CILs offer efficient and environmentally friendly solutions for enantiomeric separation.
  • Further research into CILs will expand their utility in pharmaceutical and food industries.