ArticleLuminescence : the journal of biological and chemical luminescence2026
Chelation-Controlled Fluorescence: A Novel Coumarin-Thiazole Probe for Zn (II) Analysis in Real Samples.
Article in Luminescence : the journal of biological and chemical luminescence, 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
In this investigation, an exceptional coumarin-thiazole-based fluorescent sensor was fabricated through a facile one-pot synthetic strategy, affording a highly emissive blue-fluorescent probe suitable for Zn (II) determination. The synthesized fluorescent probe exhibited a strong emission band at 470 nm upon excitation at 410 nm with a quantum yield of 0.95 ± 0.05. Incremental additions of Zn (II) from 2.5 to 37.5 μM induced a pronounced turn-off response in fluorescence intensity. An excellent linearity (r = 0.9999) was established between the quenching magnitude and Zn (II) concentration, with a limit of detection (LOD) reaching 0.47 μM, indicative of exceptional sensitivity. This fluorescence attenuation was ascribed to a chelation-induced static quenching mechanism, as corroborated by Stern-Volmer analysis, confirming the formation of a non-emissive Zn (II)-probe complex. The protocol demonstrated practical utility in assaying Zn (II) within commercial tablets and river water matrices, yielding recovery rates of 97.70%-102.85%. These results demonstrate the high selectivity of the fabricated probe and its negligible susceptibility to matrix interferences. Collectively, this methodology offers a facile, economical one-pot synthesis route alongside a highly sensitive spectrofluorimetric platform, thereby extending its scope for real-world environmental and pharmaceutical monitoring.
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