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- W2078593467 abstract "A fluorescent sensor has been synthesized that comprises a pyrene moiety tethered to a [2,2′:6′,2″]-terpyridyl ligand via a diethynylated thiophene linker. This multicomponent supermolecule is highly emissive in solution but addition of Zn2+ cations results in a drastic decrease in the fluorescence yield. Complexation between Zn2+ cations and the vacant terpyridyl ligand has been confirmed by NMR spectroscopy and by electrospray mass spectrometry. The ES-MS results provide strong support for the formation of both 1 ∶ 1 and 1 ∶ 2 (metal ∶ ligand) complexes in solution. Complexation is further evidenced by a pronounced shift in the absorption spectrum, by the appearance of a long-wavelength band in the fluorescence spectrum and by cyclic voltammetry. On the basis of UV-visible spectrophotometric titrations, overall binding constants of logβ1 ≈ 5.1 and logβ2 ≈ 9.9 were derived for the 1 ∶ 1 and 1 ∶ 2 complexes, respectively, in acetonitrile solution. The possible application of this system as a generic chemical sensor for cationic species is mentioned." @default.
- W2078593467 created "2016-06-24" @default.
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- W2078593467 date "2003-01-01" @default.
- W2078593467 modified "2023-09-23" @default.
- W2078593467 title "A general purpose reporter for cations: absorption, fluorescence and electrochemical sensing of zinc(ii)" @default.
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- W2078593467 doi "https://doi.org/10.1039/b313413j" @default.
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