A fluorescence 'turn-on' chemosensor for Hg2+and Ag+based on NBD (7-nitrobenzo-2-oxa-1,3-diazolyl)
| Autor: | Seong Youl Lee, Kwon Hee Bok, Cheal Kim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Aqueous solution Fluorophore 010405 organic chemistry Chemistry General Chemical Engineering General Chemistry 010402 general chemistry Photochemistry 01 natural sciences Fluorescence 0104 chemical sciences Electron transfer chemistry.chemical_compound Amine gas treating Density functional theory Ethylamine |
| Zdroj: | RSC Advances. 7:290-299 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra25585j |
| Popis: | A new fluorescent sensor 1 was prepared by bridging a 7-nitrobenzo-2-oxo-1,3-diazolyl (NBD) fluorophore with a dimethyl ethylene amine group via an ethylamine spacer. Distinct “turn-on” fluorescence changes of 1 were observed upon the addition of Hg2+ and Ag+ in the aqueous solution. The sensor 1 showed high sensitivity toward Hg2+ and Ag+ with detection limits of 0.05 μM and 0.12 μM, respectively. Moreover, the sensing abilities of 1 for Hg2+ and Ag+ were successfully carried out in real water samples, and 1 functioned as fluorescent test strip with silica plate. The sensing mechanisms of 1 with Hg2+ and Ag+ were studied by using photophysical experiments, NMR titration, and ESI-mass spectrometry analysis. Moreover, turn-on fluorescence of 1 toward Hg2+ and Ag+ caused by photo-induced electron transfer (PET) was explained by density functional theory (DFT) calculations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|