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Related Concept Videos

Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
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Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
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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 basic...
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Related Experiment Video

Updated: Jun 13, 2026

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
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Published on: August 23, 2018

Highly fluorinated cyclodextrins and their host-guest interactions.

Maria M Becker1, Bart Jan Ravoo

  • 1Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.

Chemical Communications (Cambridge, England)
|May 18, 2010
PubMed
Summary

New water-soluble cyclodextrins were created with fluorine. These fluorinated cyclodextrins show a preference for binding with other fluorinated molecules, opening new possibilities in molecular interactions.

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Published on: August 15, 2016

Area of Science:

  • Supramolecular Chemistry
  • Organic Synthesis
  • Materials Science

Background:

  • Cyclodextrins are cyclic oligosaccharides with a hydrophobic cavity and hydrophilic exterior.
  • Modifications of cyclodextrins can alter their solubility and guest-binding properties.
  • Fluorinated compounds offer unique chemical and physical characteristics.

Purpose of the Study:

  • To synthesize novel, water-soluble, highly fluorinated cyclodextrins.
  • To investigate the guest-binding preferences of these modified cyclodextrins.
  • To explore potential applications in areas requiring selective molecular recognition.

Main Methods:

  • Chemical synthesis involving substitution reactions on the cyclodextrin core.
  • Introduction of trifluoroethylthiol groups at the primary face.
  • Attachment of triethyleneglycol chains at the secondary face to enhance water solubility.

Main Results:

  • Successful synthesis of water-soluble, highly fluorinated cyclodextrins.
  • Demonstrated preferential interaction of the synthesized cyclodextrins with fluorinated guest molecules.
  • Characterization of the modified cyclodextrins' structure and properties.

Conclusions:

  • The synthesized fluorinated cyclodextrins exhibit selective binding towards fluorinated guests.
  • These novel cyclodextrins represent a promising class of molecules for host-guest chemistry.
  • Potential applications include separation technologies, drug delivery, and sensing of fluorinated compounds.