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A rhodamine-based chemosensors (RF) was designed, and their sensing behavior toward metal ions was investigated by fluorescence spectroscopies. RF showed high selective recognition toward Cr 3+ over other examined metal ions in aqueous media. With the optimum condition described, the response was linearly proportional to the concentration of Cr 3+ in the range 0–10 μM with a detection...
A novel xanthene dye was designed and synthesized from rhodamine B, hydrazine hydrate and 4-chloro-7-nitro-2,1,3-benzoxadiazole. The sensing activity of the new rhodamine dye toward metal ions was carefully investigated. In H 2 O/CH 3 CN (1/1, v/v), the dye showed high selectivity and sensitivity to Cu 2+ by remarkable absorption and fluorescence enhancement, while in H ...
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