ArticleChemistry, an Asian journal2026
Luminescent Naphthalenediimide-Tröger's Base Covalent Organic Polymers for Selective, Sensitive, and Reversible Detection of Roxarsone in Aqueous Media.
Article in Chemistry, an Asian journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Roxarsone (ROX), a widely used poultry feed additive, poses significant environmental risks when it enters wastewater streams. Consequently, its reliable detection and removal from aqueous environments are of considerable importance but remain technically challenging. In this study, we report two luminescent naphthalenediimide-based Tröger's base covalent organic polymers (COPs), namely 1,4-NDI-TB and 1,3-NDI-TB, designed for the selective and reversible sensing of ROX in aqueous media via a fluorescence "turn-off" mechanism. Notably, this work represents the first example of naphthalenediimide-based Tröger's base COPs for ROX sensing, combining high selectivity, reversibility, and effective operation in real aqueous systems. Fluorescence titration studies reveal that both COPs exhibit high selectivity toward ROX, even in the presence of competing analytes. Notably, both COPs exhibit fluorescence-quenching efficiencies exceeding 61% upon interaction with ROX. The Stern-Volmer quenching constants were determined to be 1.28 × 10
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