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- W1964549420 abstract "A new quinoline-based probe was designed that shows one-photon ratiometric and two-photon off–on changes upon detecting Cd2+. It exhibits fluorescence emission at 407 nm originating from quinoline groups in Tris-HCl (25 mM, pH 7.40), H2O/EtOH (8:2, v/v). Coordination with Cd2+ causes quenching of the emission at 407 nm and simultaneously yields a remarkable redshift of the emission maximum to 500 nm with an isoemissive point at 439 nm owing to an intramolecular charge-transfer mechanism. Thus, dual-emission ratiometric measurement with a large redshift (Δλ=93 nm) and significant changes in the ratio (F500/F439) of the emission intensity (R/R0 up to 27) is established. Moreover, the sensor H2L displays excellent selectivity response, high sensitive fluorescence enhancement, and strong binding ability to Cd2+. Coordination properties of H2L towards Cd2+ were fully investigated by absorption/fluorescence spectroscopy, which indicated the formation of a 2:1 H2L/Cd2+ complex. All complexes were characterized by X-ray crystallography, and TD-DFT calculations were performed to understand the origin of optical selectivity shown by H2L. Two-photon fluorescence microscopy experiments have demonstrated that H2L could be used in live cells for the detection of Cd2+." @default.
- W1964549420 created "2016-06-24" @default.
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- W1964549420 date "2014-10-24" @default.
- W1964549420 modified "2023-10-15" @default.
- W1964549420 title "A Highly Selective Two-Photon Fluorescent Probe for Detection of Cadmium(II) Based on Intramolecular Electron Transfer and its Imaging in Living Cells" @default.
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- W1964549420 doi "https://doi.org/10.1002/chem.201404224" @default.
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