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 |
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ページ(範囲) | 8729-8735 |
ページ数 | 7 |
ジャーナル | Journal of Organic Chemistry |
巻 | 63 |
号 | 24 |
DOI | |
出版ステータス | Published - 1998 11月 27 |
外部発表 | はい |
ASJC Scopus subject areas
- 有機化学