1996•Supramolecular chemistryRequires access

Supramolecular assembly of dye-modified cyclodextrin formed by inclusion of its dye-part in native cyclodextrin

Tetsuo Kuwabara, Asao Nakamura, Tsukasa Ikeda, Hiroshi Ikeda, Akihiko Ueno, Fujio Toda

Abstract

A dye-appended β-cyclodextrin (1) associates with α-cyclodextrin (α-CD) with color change, forming an asymmetric rotaxane-like structure containing two different cyclodextrins. The similar phenomenon was observed in the system of 1 and β-CD. The association constant of 1 for α-CD (198 M−1) is larger than that for β-CD (43 M−1), indicating that the pseudo-rotaxane is more stable when 1 associates with α-CD.

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Key concepts: Rotaxane, Cyclodextrin, Chemistry, Supramolecular chemistry, Stability constants of complexes, Inclusion compound, Polymer chemistry, Crystallography