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A Highly Sensitive and Selective Fluorescent Chemodosimeter for Hg2+ in Neutral Aqueous Solution

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Abstract

A fluorescent assay of Hg2+ in neutral aqueous solution was developed using N-[p-(dimethylamino)benzamido]-N′-phenylthiourea (1). 1’s fluorogenic chemodosimetric behaviors towards various metal ions were studied and a high sensitivity as well as selectivity was achieved for Hg2+. It was because of a strongly fluorescent 1,3,4-oxadiazoles which was produced by the Hg2+ promoted desulfurization reaction. The spectra of ESI mass and IR provided evidences for this reaction. According to fluorescence titration, a good linear relationship ranging from 1.0 × 10−7 to 2.0 × 10−5 mol l−1 was obtained with the limit of detection as 3.1 × 10−8 mol l−1.

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Acknowledgements

The authors gratefully acknowledge the financial support of this study by the State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University (no. 2005018), Jiangxi Province Natural Science Foundation (JXNSF no. 0420041), Jiangxi Province Education Ministry Foundation (no. 2005-38). We would also like to thank Prof. YunBao Jiang from Xiamen University for his kind support.

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Authors and Affiliations

  1. Department of Chemistry, Nanchang University, Nanchang, 330031, China

    Fang-Ying Wu, Yong-Qiang Zhao & Zhao-Jun Ji

  2. The Center of Analysis and Testing, Nanchang University, Nanchang, 330047, China

    Fang-Ying Wu & Yu-Mei Wu

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  1. Fang-Ying Wu
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  2. Yong-Qiang Zhao
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  3. Zhao-Jun Ji
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  4. Yu-Mei Wu
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Correspondence to Fang-Ying Wu.

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Wu, FY., Zhao, YQ., Ji, ZJ. et al. A Highly Sensitive and Selective Fluorescent Chemodosimeter for Hg2+ in Neutral Aqueous Solution. J Fluoresc 17, 460–465 (2007). https://doi.org/10.1007/s10895-007-0212-2

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  • DOI: https://doi.org/10.1007/s10895-007-0212-2

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