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Anion-induced ring-opening of fluorescein spirolactam: fluorescent OFF-ON
- Issue Date
- Apr-2007
- Publisher
- Elsevier BV
- Citation
- Tetrahedron Letters, v.48, no.18, pp 3159 - 3162
- Pages
- 4
- Journal Title
- Tetrahedron Letters
- Volume
- 48
- Number
- 18
- Start Page
- 3159
- End Page
- 3162
- ISSN
- 00404039
- Abstract
- N-(2,7-Dichlorofluorescein)lactam-N′-phenylthiourea (L) was developed as a colorimetric and fluorescent chemosensor for anions such as AcO-, F- and H2 PO4-. The addition of AcO- anion to the solution of L in CH3CN results in a distinct fluorescence "ON" observation as well as color change (from colorless to pink). The H-bonding interaction between AcO- anion and thiourea moiety of L induced the ring-opening of the spirolactam of fluorescein moiety, which gave rise to the dual chromo- and fluorogenic changes. ？ 2007 Elsevier Ltd. All rights reserved.
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