Highly selective fluorescence detection for mercury (II) ions in aqueous solution using water soluble conjugated polyelectrolytes

被引：37

作者：

Lu, Haiyan ^{[1
,2
]}

Tang, Yanli ^{[1
,2
]}

Xu, Wei ^{[1
,2
]}

Zhang, Deqing ^{[1
,2
]}

Wang, Shu ^{[1
,2
]}

Zhu, Daoben ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Organ Solids, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2008年 / 29卷 / 17期

基金：

中国国家自然科学基金;

关键词：

conjugated polymers; electrochemistry; fluorescence; selectivity; sensors;

D O I：

10.1002/marc.200800276

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A highly selective assay method has been developed to detect mercury (II) (Hg2+) ions using cationic conjugated polymer (CCP). The transduction mechanism is based on a Hg2+ promoted reaction. In the absence of Hg2+ 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 Hg2+ 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 Hg2+ promoted reaction. By triggering the change in the emission intensity of CCP, it is possible to detect Hg2+ ions in aqueous solution.

引用

页码：1467 / 1471

页数：5

共 27 条

[1] Fluorescence superquenching of conjugated polyelectrolytes: applications for biosensing and drug discovery [J].