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- Title
Significant improved selectivity of a fluorescent sensor for Al<sup>3+</sup> made from a fluorinated rhodamine B Schiff base.
- Authors
Wan, Chao; Li, Hui; Wang, Jianzhi; Wang, Feng; Shu, Ge; He, Luying
- Abstract
Two rhodamine B-based Schiff bases (RBF, RBC) with different substituent groups (-F and -COOH) have been synthesized. In order to study the sensing properties of two Schiff bases for metal ions, the interaction of Schiff bases with different metal ions was studied over UV-Vis absorption spectra and photofluorescent spectra. The results show that the RBF is a turn-on fluorescent chemosensor for Al3+ ions with being highly selective and sensitive in ethanol. The value of the fluorescence increase factor shows a good linear relationship with the concentration of Al3+ in the range of 1-9 μM with a detection limit of 0.8 μM. Meanwhile, upon addition of Al3+ or Fe3+ ions, the fluorescence intensity of RBC increased significantly (FFe3+FAl3+=0.77). These studies show that, compared with the carboxyl group (-COOH), the introduction of fluorine atoms (-F) to a rhodamine B-based Schiff base can significantly improve selectivity to Al3+.
- Subjects
RHODAMINE B; ROYAL Bank of Canada; SCHIFF bases
- Publication
Research on Chemical Intermediates, 2019, Vol 45, Issue 4, p1815
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-018-3705-5