Pyrazine-Naphthalene-Based AIE-Active Polymer as a Highly Sensitive Fluorescent Probe for Fe³⁺ Detection
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A novel amide-containing AIE polymer was synthesized via condensation polymerization of pyrazine-2,5-dicarboxylic acid and naphthalene-1,5-diamine. The polymer showed strong fluorescence in aggregates and selective quenching for Fe³⁺, serving as an efficient probe. The chelation-enhanced quenching mechanism was studied. This work offers a simple approach to AIE-active polymeric probes for environmental and biological sensing.