| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1407665 | Journal of Molecular Structure | 2016 | 5 Pages |
•A new rhodamine-based fluorescent “off-on” probe for Al3+ has been developed.•The probe shows a high sensitivity and selectivity for Al3+.•Response of probe to Al3+ is a cation-catalyzed reaction.•The probe has been used for monitoring Al3+ in drinking water.
A rhodamine derivative (R1) has been synthesized by a hydrazone formation of rhodamine 6G hydrazide with 3-methylthiophene-2-carbaldehyde, which exhibits high selectivity and sensitivity as an “off–on” fluorescent sensor toward Al3+ in water containing media. The binding process was confirmed by UV–vis absorption, fluorescence measurements, mass spectroscopy and DFT calculation. The probe functions by Al3+ induced hydrolytic cleavage of the imine-bond to produce an intense rhodamine-based emission. To test the practical use of the probe, the determination of Al3+ in real water samples was also evaluated.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
