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Related Experiment Videos

Host-guest complex formation in cyclotrikis-(1-->6).

P Cescutti1, J P Utille, R Rizzo

  • 1Dipartimento di Biochimica, Biofisica e Chimica delle Macromolecole, Università di Trieste, Italy.

Carbohydrate Research
|December 29, 2000
PubMed
Summary

Cyclotrikis-(1-->6)-[alpha-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl] (CGM6) can form inclusion complexes, particularly with the fluorescent dye TNS. Molecular modeling and spectroscopy confirm CGM6

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Area of Science:

  • Carbohydrate chemistry
  • Supramolecular chemistry
  • Spectroscopy

Background:

  • Cycloamyloses (cyclodextrins) are known for forming inclusion complexes.
  • Cyclotrikis-(1-->6)-[alpha-D-glucopyranosyl-(1-->4)-beta-D-glucopyranosyl] (CGM6) is a cyclic oligosaccharide with potential complexing abilities.

Purpose of the Study:

  • To investigate the inclusion complex formation of CGM6.
  • To compare the complexing ability of CGM6 with that of cyclodextrins using specific guest molecules.

Main Methods:

  • Electrospray mass spectrometry
  • Fluorescence spectroscopy
  • Fixed 90-degree angle light scattering
  • Molecular modeling

Main Results:

Related Experiment Videos

  • CGM6 showed minimal complexation with 1-anilinonaphthalene-8-sulfonate (ANS).
  • CGM6 formed detectable adducts with 2-p-toluidinylnaphthalene-6-sulfonate (TNS).
  • Molecular modeling indicated a polar internal cavity in CGM6, supporting TNS complexation via polar interactions.

Conclusions:

  • CGM6 exhibits selective inclusion complex formation, favoring TNS over ANS.
  • The polar nature of CGM6's cavity facilitates complexation with polar molecules like TNS.
  • CGM6 represents a novel host molecule with potential applications in molecular recognition.