一种用于中性水溶液中Hg2+的高灵敏度和高选择性荧光化学传感器。

A highly sensitive and selective fluorescent chemodosimeter for Hg2+ in neutral aqueous solution.

作者信息

Wu Fang-Ying, Zhao Yong-Qiang, Ji Zhao-Jun, Wu Yu-Mei

机构信息

Department of Chemistry, Nanchang University, Nanchang 330031, China.

出版信息

J Fluoresc. 2007 Sep;17(5):460-5. doi: 10.1007/s10895-007-0212-2. Epub 2007 Jul 17.

DOI:10.1007/s10895-007-0212-2

PMID:17636452

Abstract

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).

摘要

利用N-[对-(二甲氨基)苯甲酰胺基]-N'-苯基硫脲(1)开发了一种用于中性水溶液中Hg(2+)的荧光检测方法。研究了1对各种金属离子的荧光化学计量行为，对Hg(2+)具有高灵敏度和选择性。这是由于Hg(2+)促进的脱硫反应产生了强荧光的1,3,4-恶二唑。电喷雾电离质谱和红外光谱为该反应提供了证据。根据荧光滴定，在1.0×10(-7)至2.0×10(-5)mol l(-1)范围内获得了良好的线性关系，检测限为3.1×10(-8)mol l(-1)。