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- W2955703294 startingPage "107651" @default.
- W2955703294 abstract "Abstract A molecule 3 containing multiple nitrogen heterocycles has been designed and synthesized. The systematical studies on sensing behaviors of compound 3 in DMSO/H 2 O by fluorescent and UV– vis absorption spectra indicate that this molecule shows the selectivity to Cu 2+ , Hg 2+ and Zn 2+ by dual-channels. Compound 3 shows significant fluorescence quenching to both Cu 2+ and Hg 2+ but with a red-shift for Hg 2+ , and only for Zn 2+ there are fluorescence colorimetric and ratiometric changes. Furthermore, the absorption spectrum of 3 to Cu 2+ also exhibits ratiometric change with the color change of solution from colorless to yellow, while no similar response to Hg 2+ and Zn 2+ . These changes can be recognized via naked eyes. Three kinds of different mechanism have been convincingly proposed through ESI-Mass, 1 H NMR titration, FT-IR spectra and DFT calculation. The suitable pH range of sensor 3 to Cu 2+ , Hg 2+ , Zn 2+ has been determined to be 5.1–13.3, 6.9–11.2, 5.1–12.2, respectively. And time response experiments show that, as a fast-responsive fluorescent sensor for three kinds of cations, it can be used for the real-time analysis of Hg 2+ . Particularly, the reversible detection of Cu 2+ in 5 cycles indicates that sensor 3 is expected to be a molecular logic gate for Cu 2+ ." @default.
- W2955703294 created "2019-07-12" @default.
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- W2955703294 date "2019-11-01" @default.
- W2955703294 modified "2023-09-28" @default.
- W2955703294 title "A dual-channel sensor containing multiple nitrogen heterocycles for the selective detection of Cu2+, Hg2+ and Zn2+ in same solvent system by different mechanism." @default.
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- W2955703294 doi "https://doi.org/10.1016/j.dyepig.2019.107651" @default.
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