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• W2034231668 abstract "A new fluorescent sensor, 2-(2-oxo-2-(quinolin-8-ylamino)ethoxy)-N-(pyridine-2-ylmethyl) benzamide (L), composed of a quinoline group as the fluorogenic unit and a pyridin-2-ylmethanamine as the binding unit for metal ions has been synthesized. The sensor shows excellent selectivity and sensitivity with a fluorescence enhancement to Zn2+ over other cations in acetonitrile aqueous solution. The X-ray crystal structure analysis reveals that sensor L coordinates to Zn2+via a 1 : 1 binding mode but to Cd2+via a 2 : 1 binding mode, which lead to a different spatial arrangement of the fluorogenic unit in these complexes. In addition, density functional theory calculations on L, and the Zn2+/L and Cd2+/L complexes also imply that the different structures of L significantly affect the molecular orbital energy levels and electron transition, which would result in the spectral changes to distinguish Zn2+ from Cd2+. The absorption study results may also suggest the Cd2+ in the complex can be displaced by Zn2+. Furthermore, the fluorescence imaging of Zn2+ in living cells was obtained." @default.
• W2034231668 created "2016-06-24" @default.
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• W2034231668 date "2014-01-01" @default.
• W2034231668 modified "2023-09-26" @default.
• W2034231668 title "A highly fluorescent chemosensor for Zn²⁺and the recognition research on distinguishing Zn²⁺from Cd²⁺" @default.
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• W2034231668 doi "https://doi.org/10.1039/c3dt52165f" @default.
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