Abstract
Abstract A novel turn-on colorimetric and fluorescent sensor 1 based on rhodamine B was developed as a colorimetric and fluorescent chemosensor for Fe3+. Upon addition of Fe3+ in aqueous ethanol, the 1 displayed a distinct color change from colorless to pink and a significant fluorescence enhancement, which can be directly detected by the naked eye. The stoichiometry of 1 to Fe3+ complex was found to be 1:1 and the detection limit was determined as low as 7.68 × 10−7 M. The results suggest that the sensor 1 may provide a conveniently method for visual detection of Fe3+ with high sensitivity. Furthermore the sensor has been utilized for fluorescence imaging of Fe3+ in living cells.
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