Abstract
Five new 4- or 8-substituted-7-hydroxycoumarin derivatives (1-5) were synthesized as fluorescent sensors for metal ions. Fluorescent changes and selectivity for metal ions were compared based on the introduction of different ligands and/or testing with different substitution positions of 7-hydroxycoumarin in aqueous solution. Especially, probes 2, 3 and 5 displayed large fluorescence enhancements with Zn2+ and Cd2+. Probes 2 and 3 showed moderate selectivity for Zn2+ over Cd2+. On the other hand, probe 4 showed large fluorescence quenching effects upon the addition of Ag+ and Hg2+.
Original language | English |
---|---|
Pages (from-to) | 3611-3616 |
Number of pages | 6 |
Journal | Bulletin of the Korean Chemical Society |
Volume | 31 |
Issue number | 12 |
DOIs | |
State | Published - 20 Dec 2010 |
Keywords
- Cd sensor
- Coumarin
- Fluorescence
- Fluorescent chemosensors
- Zn sensor