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Simultaneous determination of Hg(II) and Zn(II) using a GFP inspired chromophore
- Shi, Lei, Li, Yang, Liu, Zhao-Peng, James, Tony D., Long, Yi-Tao
- Talanta 2012 v.100 pp. 401-404
- colorimetry, fluorescence, green fluorescent protein, ions, mercury, zinc
- A dual-function chemosensor for Hg²⁺ and Zn²⁺ ions, inspired by the green fluorescent protein (GFP) chromophore, was designed and synthesized, which could specifically recognize Zn²⁺ through an “OFF–ON” fluorescence mechanism due to the restriction of the free rotation of the aryl–alkene bond, whilst also producing a selective visible colorimetric response from yellow to pink with Hg²⁺ ions. The response upon exposure to Zn²⁺ and Hg²⁺ is instantaneous, and the detect limits of Zn²⁺ and Hg²⁺ are 2.18×10⁻⁸M and 4.91×10⁻⁷M respectively.