A highly sensitive and selective fluorescent chemodosimeter for Hg2+ in neutral aqueous solution.
A fluorescent assay of Hg(2+) in neutral aqueous solution was developed using N-[p-(dimethylamino)benzamido]-N'-phenylthiourea (1). 1's fluorogenic chemodosimetric behaviors towards various metal ions were studied and a high sensitivity as well as selectivity was achieved for Hg(2+). It was because of a strongly fluorescent 1,3,4-oxadiazoles which was produced by the Hg(2+) promoted desulfurization reaction. The spectra of ESI mass and IR provided evidences for this reaction. According to fluorescence titration, a good linear relationship ranging from 1.0 x 10(-7) to 2.0 x 10(-5) mol l(-1) was obtained with the limit of detection as 3.1 x 10(-8) mol l(-1).
Wu
Fang-Ying
FY
Department of Chemistry, Nanchang University, Nanchang 330031, China. fywu@ncu.edu.cn
Zhao
Yong-Qiang
YQ
Ji
Zhao-Jun
ZJ
Wu
Yu-Mei
YM
D004785:Environmental Pollutants / Q000032:analysis; D005456:Fluorescent Dyes; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D008628:Mercury / Q000032:analysis*; D012680:Sensitivity and Specificity; D012996:Solutions; D013050:Spectrometry, Fluorescence / Q000379:methods* / Q000706:statistics & numerical data; D014867:Water
D004785:Environmental Pollutants; D005456:Fluorescent Dyes; D012996:Solutions; D014867:Water; D008628:Mercury