Highly Selective Fluorescence Detection for Mercury (II) Ions in Aqueous Solution Using Water Soluble Conjugated Polyelectrolytes
✍ Scribed by Haiyan Lu; Yanli Tang; Wei Xu; Deqing Zhang; Shu Wang; Daoben Zhu
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 230 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
A highly selective assay method has been developed to detect mercury (II) (Hg^2+^) ions using cationic conjugated polymer (CCP). The transduction mechanism is based on a Hg^2+^ promoted reaction. In the absence of Hg^2+^ ions, the CCP can form the complex with an anionic 1,3‐dithiole‐2‐thione derivative through electrostatic interactions. The fluorescence of CCP is efficiently quenched by 1,3‐dithiole‐2‐thione derivative via an electron transfer process. Upon adding Hg^2+^ ions, the transformation of 1,3‐dithiole‐2‐thione into 1,3‐dithiole‐2‐one inhibits the quenching, and the fluorescence of CCP is recovered. Distinguishing aspects of this assay include the signal amplification of CCPs and a specific Hg^2+^ promoted reaction. By triggering the change in the emission intensity of CCP, it is possible to detect Hg^2+^ ions in aqueous solution.
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