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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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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
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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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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.
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Updated: Jun 26, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Cyclodextrin Functionalized Ionic Liquids: Synthesis and Application in Analytical Chemistry.

Ayushi Aggarwal1, Harish Kumar Chopra1

  • 1Department of Chemistry, Sant Longowal Institute of Engineering & Technology, Longowal, India.

Critical Reviews in Analytical Chemistry
|May 16, 2024
PubMed
Summary
This summary is machine-generated.

Cyclodextrin functionalized ionic liquids (CDILs) combine cyclodextrins and ionic liquids for advanced separation techniques. This review explores their synthesis and applications in analytical chemistry, enhancing separation efficiency.

Keywords:
Cyclodextrinanalytical chemistrycyclodextrin functionalized ionic liquidsionic liquids

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Area of Science:

  • Analytical Chemistry
  • Supramolecular Chemistry
  • Green Chemistry

Background:

  • Cyclodextrins are cyclic oligosaccharides with a unique torus shape, enabling selective molecular recognition.
  • Ionic liquids are designer solvents with low melting points, offering tunable properties and environmental benefits.
  • Cyclodextrin functionalized ionic liquids (CDILs) synergistically combine the host-guest chemistry of cyclodextrins with the versatile nature of ionic liquids.

Purpose of the Study:

  • To review the synthesis strategies for cyclodextrin functionalized ionic liquids (CDILs).
  • To highlight the applications of CDILs in various separation techniques within analytical chemistry.
  • To elucidate the interaction mechanisms between CDILs and analytes during separation processes.

Main Methods:

  • Synthesis of various cyclodextrin functionalized ionic liquids.
  • Application of CDILs as stationary phases or mobile phase additives in chromatography.
  • Utilization of CDILs in capillary electrophoresis for chiral and isomeric separations.

Main Results:

  • CDILs demonstrate enhanced selectivity and efficiency in separating enantiomers, positional isomers, and other complex mixtures.
  • The tunable nature of both cyclodextrin and ionic liquid components allows for tailored separation capabilities.
  • Successful application of CDILs in capillary electrophoresis (CE), high-performance liquid chromatography (HPLC), and gas chromatography (GC).

Conclusions:

  • Cyclodextrin functionalized ionic liquids represent a powerful class of materials for advanced separation science.
  • The combination of cyclodextrins and ionic liquids offers significant advantages for analytical chemistry applications.
  • Further research into CDILs promises novel solutions for challenging separation problems.