title: Fluorescence signaling of Zr4+ by hydrogen peroxide assisted selective desulfurization of thioamide.
abstract: Thioamide derivative with a pyrene fluorophore was smoothly transformed to its corresponding amide by Zr(4+) ions in the presence of hydrogen peroxide. The transformation was evidenced by (1)H NMR spectroscopy and the signaling was completed within 10 min after sample preparation. Interference from Ag(+) and Hg(2+) ions in Zr(4+)-selective fluorescence signaling was readily suppressed with the use of Sn(2+) as a reducing additive. Discrimination of Zr(4+) from closely related hafnium, which is a frequent contaminant in commercial zirconium, was not possible. Prominent Zr(4+)-selective turn-on type fluorescence signaling was possible with a detection limit of 4.6 × 10(-6) M in an aqueous 99% ethanol solution.
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea.
authors.forename: Jiyoung
authors.initials: J
authors.lastname: Hwang
authors.forename: Myung Gil
authors.initials: MG
authors.lastname: Choi
authors.forename: Suyoung
authors.initials: S
authors.lastname: Eor
authors.forename: Suk-Kyu
authors.initials: SK
authors.lastname: Chang