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- W2049276937 abstract "A dual turn-on/turn-off fluorescence sensing system based on N-alkylaminopyrazole ligands for heavy metal ions, where the response can be tuned upon medium change, is developed. The synthesis and characterization of ZnII, CdII and HgII complexes with two N-alkylaminopyrazole ligands, used as metal receptors, are first presented. The acidity and complexation constants for a selected ligand (1-[2-(octylamino)ethyl]-3,5-diphenylpyrazole ligand (L2)) with ZnII, CdII, and HgII are also determined. The fluorescent behavior of these complexes can be tuned by the different medium used (e.g., MeOH or HCl) giving rise to two different sensing mechanisms. The L2 ligand can be applied as a global heavy metal warning chemosensor (for PbII, ZnII, CdII, or HgII ions) for water samples achieving detection limits lower than the maximum concentration recommended by the environmental agencies (detection limit lower than 0.3 ng/mL for any of the mentioned metal ions). The utility of the developed sensing system for HgII detection in seawater without any previous sample pretreatment with interest for future in-field sensing kit like applications is also discussed." @default.
- W2049276937 created "2016-06-24" @default.
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- W2049276937 date "2012-01-06" @default.
- W2049276937 modified "2023-10-18" @default.
- W2049276937 title "Medium Dependent Dual Turn-On/Turn-Off Fluorescence System for Heavy Metal Ions Sensing" @default.
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- W2049276937 doi "https://doi.org/10.1021/jp210687v" @default.
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