A reversible and highly selective fluorescent sensor for mercury(II) using poly (thiophene)s that contain thymine moieties

被引：195

作者：

Tang, YL ^{[1
]}

He, F ^{[1
]}

Yu, MH ^{[1
]}

Feng, FD ^{[1
]}

An, LL ^{[1
]}

Sun, H ^{[1
]}

Wang, S ^{[1
]}

Li, YL ^{[1
]}

Zhu, DB ^{[1
]}

机构：

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

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2006年 / 27卷 / 06期

关键词：

conjugated polymers; fluorescence; mercury; polythiophene; sensors;

D O I：

10.1002/marc.200500837

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 reversible and highly selective assay method has been developed to detect mercury(II) (Hg2+) ions using a conjugated polymer (CP). The transduction mechanism is based on Hg2+-mediated interpolymer pi-stacking aggregation, which results in the fluorescence self-quenching of the CP. CPs that contain thymine moieties, poly[3-(N-thymin-1-ylacetyl)ethylamine-thiophene] (PTT), have been synthesized and characteized. In the absence of Hg2+ ions, the PTT chains remain separated from each other and the CP exhibits strong fluorescence emission. Upon adding Hg2+ ions, the formation of interpolymer pi-stacking aggregation induced by specific thymine-Hg-thymine interactions results in the fluorescence quenching of PTT. Distinguishing aspects of this assay include the signal amplification of CPs and the specific binding of Hg2+ ions to thymine-thymine (T-T) base pairs.

引用

页码：389 / 392

页数：4

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