Abstract
A coumarin-appended rhodamine derivative was prepared by reacting rhodamine hydrazide and coumarin-3-carboxylic acid, which fluorescence sensing behavior toward Zn2+ against other metal ions was investigated in CH3CN. Significantly, the rodamine-coumarin derivative exhibited highly selective and sensitive recognition toward Zn2+ with a limit of detection (LOD) down to 10−9 M. Upon addition of Zn2+, remarkable fluorescent intensities enhanced and also clear color changed from colorless to pink. The Job’s plot indicated the formation of 1:1 complex between the rhodamine-coumarin derivative and Zn2+. The presence of common coexisting alkali, alkaline earth, and transition metal ions showed small or no interference with the detection of Zn2+. The conjugate dye could be used for “naked-eye” detection of Zn2+.
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We are grateful to the National Natural Science Foundation of China (21172127) for financial support.
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Wang, KP., Jin, ZH., Shang, HS. et al. A highly Selective Fluorescent Chemosensor for Zn2+ Based on the Rhodamine Derivative Incorporating Coumarin Group. J Fluoresc 27, 629–633 (2017). https://doi.org/10.1007/s10895-016-1991-0
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DOI: https://doi.org/10.1007/s10895-016-1991-0