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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 12
BKCSDE 31(12)
December 20, 2010 

New 7-Hydroxycoumarin-Based Fluorescent Chemosensors for Zn(II) and Cd(II)
K M K Swamy, Min Jung Kim, Hye Ryeong Jeon, Ji Young Jung, Juyoung Yoon*
Fluorescent chemosensors, Coumarin, Zn2+ sensor, Cd2+ sensor, Fluorescence
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+.
3611 - 3616
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