1. Fluorescent Detection of 2,4-DNT and 2,4,6-TNT in Aqueous Media by Using Simple Water-Soluble Pyrene Derivatives.
- Author
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Kovalev IS, Taniya OS, Slovesnova NV, Kim GA, Santra S, Zyryanov GV, Kopchuk DS, Majee A, Charushin VN, and Chupakhin ON
- Subjects
- Limit of Detection, Models, Molecular, Solubility, Spectrometry, Fluorescence methods, Water analysis, Dinitrobenzenes analysis, Explosive Agents analysis, Fluorescent Dyes chemistry, Herbicides analysis, Pyrenes chemistry, Trinitrotoluene analysis, Water Pollutants, Chemical analysis
- Abstract
Pyrene-containing water-soluble probes for the fluorescent detection of nitroaromatic compounds (NACs), such as explosive components (2,4-DNT and 2,4,6-TNT) and herbicides (2,4-dinitrocresol, 2,4-DNOC), in aqueous media are reported. In the probes, the introduction of surface-active hydrophilic "heads" at the periphery of lipophilic (i.e., hydrophobic) pyrene "tails" resulted in the formation of highly fluorescent micelle-like aggregates/pre-associates in aqueous solutions at concentrations of ≤10(-5) m. The enhanced fluorescence quenching of the herein reported architectures is achieved in the presence of ultra-trace amounts of TNT or 2,4-DNT with values of Stern-Volmer quenching constant close to 1×10(5) m(-1) and a detection limit as low as 182 ppb. The most hydrophilic probes demonstrated higher response to 2,4-DNT over TNT. Filter paper test strips impregnated with 1×10(-5) m solutions of the probes were able to detect TNT, 2,4-DNT, and other NACs at levels as low as 50 ppb in water., (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
- Published
- 2016
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