A highly Selective Fluorescent Chemosensor for Zn<sup>2+</sup>Based on the Rhodamine Derivative Incorporating Coumarin Group
关键字：Zinc;Fluorescence - Metal ions - Metals - Transition metal compounds - Transition metals;Coumarin - Coumarin derivatives - Fluorescence sensing - Fluorescent chemosensor - Fluorescent intensity - Limit of detection - Rhodamine - Zinc ions
摘要：A coumarin-appended rhodamine derivative was prepared by reacting rhodamine hydrazide and coumarin-3-carboxylic acid, which fluorescence sensing behavior toward Zn<sup>2+</sup>against other metal ions was investigated in CH<inf>3</inf>CN. Significantly, the rodamine-coumarin derivative exhibited highly selective and sensitive recognition toward Zn<sup>2+</sup>with a limit of detection (LOD) down to 10<sup>−9</sup> M. Upon addition of Zn<sup>2+</sup>, 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 Zn<sup>2+</sup>. The presence of common coexisting alkali, alkaline earth, and transition metal ions showed small or no interference with the detection of Zn<sup>2+</sup>. The conjugate dye could be used for “naked-eye” detection of Zn<sup>2+</sup>. © 2016, Springer Science+Business Media New York.
卷号：27
期号：2
是否译文：否