New fluorescent chemosensor based on quinoline and coumarine for Cu2+
| Autor: | Bao-Xiang Zhao, Hong-Shui Lv, Jian Zhu, Zhen-Ju Jiang |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Fluorophore
Absorption spectroscopy Mechanical Engineering Metal ions in aqueous solution Metals and Alloys Ionophore Condensed Matter Physics Photochemistry Fluorescence Fluorescence spectroscopy Electronic Optical and Magnetic Materials Job plot chemistry.chemical_compound Electron transfer chemistry Mechanics of Materials Materials Chemistry |
| Zdroj: | Synthetic Metals. 162:2112-2116 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2012.09.013 |
| Popis: | A new fluorescent chemosensor based a coumarin fluorophore and an 8-hydroxyquinoline ionophore was synthesized and characterized by 1 H NMR, IR and ESI-HRMS. Its selectivity toward metal ions in acetonitrile (1% water, v/v) was investigated by UV absorption and fluorescence spectroscopy. The results showed that this chemosensor exhibited good selectivity toward Cu 2+ over other metal ions by enhancement of fluorescence intensity more than 13-fold, and the fluorescent color change could be observed by naked eyes under the light of 365 nm. The absorption spectra of the sensor ( L ) toward the concentration of Cu 2+ indicated the formation of L –Cu 2+ complex, and the complex was 1:1 ratio according to Job plot experiment. Both of photo-induced electron transfer (PET) and intramolecular charge transfer (ICT) mechanisms were considered to be operational for fluorescence enhancement and spectral shift. The detection limit of Cu 2+ was determined to be 1.16 μM, a satisfying level to detect Cu 2+ in micromolar scale. |
| Databáze: | OpenAIRE |
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