Two novel rhodamine based fluorescent chemosensors (2 and 3) were successfully designed and synthesised which exhibited chromogenic and fluorogenic response to Hg2+ and Al3+ in CH3CN:H2O (1:1, v/v). The detection was not affected by the coexistence of the other common metal ions. The limit of detection (LOD) and association constant (Ka) revealed that the probe 2 has superior binding affinity and sensitivity to Al3+ over Hg2+. Moreover, the probe 3 has superior binding affinity and sensitivity to Hg2+ over Al3+. Binding of ions to the probes 2 and 3 were studied over a wide pH range and the result showed that both the probes can work in physiological pH conditions. Finally, the sensors can be used to detect Hg2+ and Al3+ in tap water samples with a high accuracy.
CITATION STYLE
Chemate, S., & Sekar, N. (2015). A new rhodamine based OFF-ON fluorescent chemosensors for selective detection of Hg2+ and Al3+ in aqueous media. Sensors and Actuators, B: Chemical, 220, 1196–1204. https://doi.org/10.1016/j.snb.2015.06.061
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