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A highly sensitive and selective photoinduced electron transfer (PET) fluorescence chemodosimeter L for Cu2+ detection has been synthesized and characterized. This PET chemosensor composed of a butano-tethered electron-riched phenothiazine (Ptz) donor and acridine orange (AO) signalling element. Based on the Cu2+-promoted oxidation of Ptz donor, the signalling element AO showed a unique fluorescent...
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