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Highly Sensitive Fluorescence Detection of Hg2+ Based on a Water-soluble Conjugated Polymer with Carboxylate Groups

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Abstract

A label-free, highly selective, and highly sensitive fluorescent sensor to detect Hg2+ was developed using a water-soluble conjugated polymer with carboxylate groups (poly(2,5-bis(sodium 4-oxybutyrate)-1,4-phenylethynylene-alt-1,4- phenyleneethynylene, PPE-OBS) in this work. The fluorescence of PPE-OBS would be quenched because of the effect among the unique coordination-induced aggregation and electron transfers of PPE-OBS toward Hg2+. The linear relationship between the fluorescence intensity and concentration of Hg2+ was observed within the range from 6 × 10−8 to 8 × 10−5 mol L−1 (R2 = 0.9985), and the limit of detection was 2.10 × 10−9 mol L−1. The proposed method was applied to detect Hg2+ in environmental water samples, and satisfactory results were obtained.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 21207047), the State Major Project for Science and Technology Development, China (No. 2013YQ47078102-3), and the Science-Technology Development Project of Jilin Province of China (No. 20130206014GX, 20140623007TC, 20150204017YY).

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Authors and Affiliations

  1. Department of Analytical Chemistry, College of Chemistry, Jilin University, Jiefang Road 2519, Changchun, 130012, P. R. China

    Hongyu Mi, Mingming Guan, Hongyan Shan, Qiang Fei, Yanfu Huan, Zhiquan Zhang & Guodong Feng

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  1. Hongyu Mi
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  2. Mingming Guan
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  3. Hongyan Shan
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  4. Qiang Fei
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  5. Yanfu Huan
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  6. Zhiquan Zhang
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  7. Guodong Feng
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Correspondence to Guodong Feng.

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Mi, H., Guan, M., Shan, H. et al. Highly Sensitive Fluorescence Detection of Hg2+ Based on a Water-soluble Conjugated Polymer with Carboxylate Groups. ANAL. SCI. 32, 1039–1045 (2016). https://doi.org/10.2116/analsci.32.1039

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  • DOI: https://doi.org/10.2116/analsci.32.1039

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