A Coumarin-Derived Fluorescence Chemosensors Selective for Copper(II)

Two different coumarin derivatives have been connected via animine linkage to obtain a new fluorescence signaling system. The coumarin derivative (L) containing a C-N group was designed as an example for illustration. The free ligand L is almost nonfluorescent due to the isomerization of C-N double...

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Bibliographic Details
Published in:Analytical letters 2008-08, Vol.41 (12), p.2203-2213
Main Authors: Sheng, Jiang Run, Feng, Feng, Qiang, You, Liang, Fu Guo, Sen, Lin, Wei, Fu-Hong
Format: Article
Language:English
Subjects:
Analytical chemistry
Bonding
Chemistry
Coumarin
Derivatives
Emission
Exact sciences and technology
Fluorescence
fluorescence sensors
General, instrumentation
imine
Isomerization
Ligands
Mathematical analysis
Spectrometric and optical methods
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Summary:Two different coumarin derivatives have been connected via animine linkage to obtain a new fluorescence signaling system. The coumarin derivative (L) containing a C-N group was designed as an example for illustration. The free ligand L is almost nonfluorescent due to the isomerization of C-N double bond in the excited state. However, in the presence of a Cu(II) ion, this isomerization is stopped because of bonding to the metal ion, resulting in a high-intensity (400-fold) emission. In this way, we designed a new compound for copper-selective and ratiometric chemosensors.
ISSN:0003-2719
1532-236X
DOI:10.1080/00032710802237673