Abstract
We have successfully developed a novel thiourea-based chemosensorN-((6-methylbenzo[d]thiazol-2-yl)carbamothioyl)-3,5-bis(trifluoromethyl)benzamide, TS, specifically designed for the detection of Hg2+. The structure of TS was comprehensively characterized using techniques such as 1H NMR, FT-IR, and fluorescence spectroscopy. TS exhibited exceptional fluorescence enhancement in the presence of Hg2+ ions when tested against a broad range of metal ions, including Cr3+, Co2+, Ca2+, Na+, Pb2+, Mn2+, K+, Ni2+, Mg2+, Zn2+, Cd2+, Cu2+, Ag+, and Al3+. The selectivity and sensitivity studies were performed in a MeOH/water (2:98, v/v) solvent system, where TS demonstrated a highly sensitive response to Hg2+ ions with a detection limit as low as 0.005µg/mL. Insights into the sensing mechanism were explained through fluorescence and Job's plot analysis, confirming a robust and efficient detection pathway with a 2:1 binding mode between TS and Hg2+. To assess its real-world applicability, recovery experiments were conducted on environmental and agricultural samples spiked with Hg2+ ions. The chemosensor achieved impressive recovery rates ranging from 90.0 ± 0.24% to 102.0 ± 0.58% across various concentration levels, demonstrating its accuracy and reliability. The unique attributes of TS, including its cost-effectiveness, simplicity, high selectivity, and ultra-sensitivity, make it an excellent candidate for the detection of trace levels of Hg2+ in diverse applications.
Published Version
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