Rhodanine-based fluorometric sequential monitoring of silver (I) and iodide ions: Experiment, DFT calculation and multifarious applications
| Autor: | Gunasekaran Prabakaran, Duraisamy Parimala devi, Kaveri Sundaram, Angamuthu Abiram, Subban Ravi, Raju Nandhakumar, Charles Immanuel David |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Detection limit Ions Environmental Engineering Silver Rhodanine Health Toxicology and Mutagenesis Iodide Quantum yield Iodides Pollution Fluorescence chemistry.chemical_compound chemistry Environmental Chemistry Physical chemistry Single bond Density functional theory Naked eye Waste Management and Disposal Density Functional Theory Fluorescent Dyes |
| Zdroj: | Journal of hazardous materials. 419 |
| ISSN: | 1873-3336 |
| Popis: | A simple rhodanine derived fluorophoric unit has been designed for selective detection of Ag+ and I- ions in DMSO-H2O medium. The sensor R1 showed an obvious “turn-on” fluorescence response toward Ag+ due to the inhibition of both C-N single bond free rotation, internal charge transfer (ICT) and the formation of chelation enhanced fluorescence (CHEF) effects. The fluorescence quantum yield (Φ) was increased from 0.0013 to 0.032 for receptor R1 upon the Ag+-complexation. In addition, the 1:1 complexing stoichiometry was employed based on Job’s plot analysis with detection limit of 24.23 × 10−7 M. Conversely, receptor R1+Ag+ particularly detects I- ion over other co-existing anions by the “turn-off” fluorescence response due to the formation of AgI, displacing the receptor R1 with the quantum yield of 0.0014. The detection limit was calculated to be 22.83 × 10−7 M. The sensing behaviour of receptor R1 toward Ag+ was also supported by density functional theory (DFT) calculations. Moreover, the sensing ability of reported receptor R1 could be exercised in multifarious applications like paper strip, silica-supported analysis, staining test for latent finger print, logical behaviour, smartphone-assisted quantitative detection and real water samples studies. |
| Databáze: | OpenAIRE |
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