Fluorescence Signaling of Zr4+by Hydrogen Peroxide Assisted Selective Desulfurization of Thioamide
- 19 January 2012
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 51 (3), 1634-1639
- https://doi.org/10.1021/ic2019428
Abstract
Thioamide derivative with a pyrene fluorophore was smoothly transformed to its corresponding amide by Zr4+ ions in the presence of hydrogen peroxide. The transformation was evidenced by 1H NMR spectroscopy and the signaling was completed within 10 min after sample preparation. Interference from Ag+ and Hg2+ ions in Zr4+-selective fluorescence signaling was readily suppressed with the use of Sn2+ as a reducing additive. Discrimination of Zr4+ from closely related hafnium, which is a frequent contaminant in commercial zirconium, was not possible. Prominent Zr4+-selective turn-on type fluorescence signaling was possible with a detection limit of 4.6 × 10–6 M in an aqueous 99% ethanol solution.Keywords
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