Abstract
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 limit of 0.023 μM. The proposed method was also applied to intracellular Cr 3+ imaging in living cells and determination Cr 3+ in tap water, river water. ► This work designed and synthesized a new fluorescent probe ( RF ). ► The probe showed high selectivity for Cr 3+ in Tris–HCl (pH = 7.2) aqueous buffer solution. ► Possible response mechanism of RF and Cr 3+ has preliminary studied as well. ► The probe was successful applied to intracellular Cr 3+ imaging in living cells. ► The proposed method was also applied to determination Cr 3+ in water samples.
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