Effects of Substituent and Solvent on Inclusion Complexation of β-Cyclodextrins with Azobenzene Derivatives

Yoshimi Sueishi, Masamichi Kasahara, Munenori Inoue, Kazuyoshi Matsueda

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The equilibrium constants (K) for the inclusion complex formation of β-cyclodextrin (β-CD) with Methyl Orange (MO) and substituted azoanilinium chlorides were determined spectrophotometrically. Based on the results, the substituent effect on the inclusion complexation of β-CD with azoanilinium chlorides was discussed in detail. Further, the solvent effects on the inclusion complexation of MO with β-CD and heptakis(2,6-di-O-methyl)- β-cyclodextrin(DM-β-CD) were examined in aqueous organic mixtures with water-miscible organic compounds (dimethylsulfoxide, acetonitrile, N, N-dimethylformamide, and acetone). It was found that the K value for the inclusion complex formation with β-CD and DM-β-CD decreases remarkably with increasing ratio of organic solvents, dependent of the surface tension of solvent mixtures.

Original languageEnglish
Pages (from-to)71-75
Number of pages5
JournalJournal of Inclusion Phenomena
Volume46
Issue number1-2
DOIs
Publication statusPublished - Jun 1 2003

Keywords

  • Azoanilinium chlorides
  • Inclusion complexation
  • Solvent effect
  • Substituent effect
  • Surface tension

ASJC Scopus subject areas

  • Food Science
  • Chemistry(all)
  • Condensed Matter Physics

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