Inclusion of Azulene and Alcohol by β-Cyclodextrin in Aqueous Solution

Sanyo Hamai, Tsukasa Ikeda, Asao Nakamura, Hiroshi Ikeda, Akihiko Ueno, Fujio Toda

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


β-Cyclodextrin (β-CD) has been found to form a ternary inclusion complex with alcohol and azulene, with a stoichiometry of 2:2:1. By means of a fluorescence method, equilibrium constants for the formation of the ternary inclusion complex have been evaluated for alcohols from ethanol to 1-pentanol. Induced circular dichroism studies suggest that in the ternary inclusion complex azulene slightly extrudes from the β-CD cavity compared with a 1:1 inclusion complex between β-CD and azulene. From an analysis of a 1H-NMR spectrum for azulene in D2O containing both β-CD and 1-propanol, 1-propanol incorporated into the β-CD cavity is deduced to be in close proximity to H-2 and H-6 of azulene in the ternary inclusion complex.

Original languageEnglish
Pages (from-to)6012-6016
Number of pages5
JournalJournal of the American Chemical Society
Issue number15
Publication statusPublished - 1992 Jul 1

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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