Phenolphthalein-modified β-cyclodextrin as a molecule-responsive colorless-to-color change indicator

Tetsuo Kuwabara, Makoto Takamura, Akiko Matsushita, Hiroshi Ikeda, Asao Nakamura, Akihiko Ueno, Fujio Toda

研究成果: Article査読

56 被引用数 (Scopus)

抄録

Phenolphthalein-modified β-CD, 1, was synthesized for the purpose of developing a new type of guest-responsive color change indicator. The pH titration curve of 1 depends on its concentration, suggesting that 1 exists not only as an self-inclusion form but also as an association form at a concentration of 10-4 M in neutral aqueous solution. At pH 11.0, the association species dissociates into the monomer one, taking a dianion form in the phenolphthalein part. Upon the guest addition at pH 9.70, 1 exhibits the color change from colorless to purple at its concentration of 5.0 x 10- 6 M due to the 1:1 host-guest complex formation. The guest-induced absorption changes were used for molecule sensing. The sensing abilities of 1 for various guests are roughly parallel to the binding constants.

本文言語English
ページ(範囲)8729-8735
ページ数7
ジャーナルJournal of Organic Chemistry
63
24
DOI
出版ステータスPublished - 1998 11 27
外部発表はい

ASJC Scopus subject areas

  • 有機化学

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