ArticleJournal of fluorescence2025
A Novel Rhodamine 6G-based Highly Sensitive Multifunctional Spectral Sensor for Fe
Article in Journal of fluorescence, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A highly sensitive multifunctional spectral sensor (RGTM) was synthesized from rhodamine 6G and 2-thiazolemethanamine by one step reaction with the assistance of dry CH3COONa. In CH3CN/H2O (50/50, v/v), Fe3+, Al3+ and Cr3+ enhanced the absorbance of RGTM at 530 nm by 44, 11 and 9 folds, and the fluorescence intensity at 553 nm by 1159, 624 and 555 folds, respectively, accompanied by significant natural and fluorescent color changes. The absorbance and fluorescence intensity of the solutions increased linearly with the ion concentration in the ranges of 0–45 µM (Fe3+), 0–30 µM (Al3+), and 0–50 µM (Cr3+). The colorimetric detection limits (DLs) for Fe3+, Al3+ and Cr3+ were 2.7, 5.5 and 10.5 µM, and the fluorescent DLs were 1.3, 1.6 and 2.9 nM, respectively. RGTM reversibly chelates Fe3+, Al3+ or Cr3+ in a 1:1 manner with binding constants of 5.64 × 106, 8.63 × 106, and 3.91 × 106 M− 1, respectively. RGTM can effectively analyze three ions in real water samples, and can also be made into portable solid-supported sensors.
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