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Reversible and Highly Selective Fluorescent Sensor for Mercury(II) Based on a Water-Soluble Poly(para-phenylene)s Containing Thymine and Sulfonate Moieties

✍ Scribed by Jing Lv; Canbin Ouyang; Xiaodong Yin; Haiyan Zheng; Zicheng Zuo; Jialiang Xu; Huibiao Liu; Yuliang Li

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
261 KB
Volume
29
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

A novel water‐soluble poly(para‐phenylene) derivative with pendant thymine and sulfonate units (PBTS) has been prepared and its metal ion sensing properties have been investigated. PBTS exhibited a reversible and selective fluorescence quenching behavior toward Hg^2+^ ions as compared to Ag^+^, Ni^2+^, Mg^2+^, Ca^2+^, Hg^2+^, Co^2+^, Cd^2+^, Cu^2+^, Pb^2+^, Ba^2+^, Fe^3+^, and Zn^2+^ ions in aqueous solution. The fluorescence quenching resulted from the interpolymeric π‐stacking aggregation which was induced by the specific thymine–Hg–thymine interaction.

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## Abstract **Summary:** A reversible and highly selective assay method has been developed to detect mercury(II) (Hg^2+^) ions using a conjugated polymer (CP). The transduction mechanism is based on Hg^2+^‐mediated interpolymer __π__‐stacking aggregation, which results in the fluorescence self‐quen