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Synthesis of a simple amidopyridinium-based sensor (F1) and its fluorescence behavior toward H2PO4− (Pi) were investigated. The anthryl group in F1 exhibited a strong excimer emission via Pi-directed assembly of F1; other anions showed a negligible effect. The Pi-induced assembly of F1 was rationalized by photophysical experiments and DFT calculation.
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Organic & Biomolecular Chemistry
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