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A new novel Rhodamine B-based fluorescent probe was synthesized for the selective cascade signaling of Fe3+ and thiols (glutathione, homo-cysteine, cysteine). Non-fluorescent rhodamine derivatives can selectively detect Fe3+ over some other metal ions in ethanol-water (4/1, v/v, pH 7.0) media, leading to prominent fluorescence OFF–ON switching. The obtained LDF-Fe3+ ensemble can subsequently serve...
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