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Synthesis of Poly-Amino Acid Ionic Liquid Up-Conversion Fluorescent Probe and its Application in Fe(II)/Fe(III) Speciation Analysis

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Abstract

The poly amino acid ionic liquid (poly-1-vinyl-3-butylimidazolium glutamate acid, p-1-VbmGlu), with a stable up-conversion fluorescence(UCF) probe, was firstly prepared and the synthesis conditions were optimized. The UCF were found to be specifically quenched by Fe(III), but not respond to Fe(II). In H2O2 medium, Fe(II) posed strong quenching effect on the UFC owing to Fe(III) produced by redox between H2O2.and Fe(II). Therefore p-1-VbmGlu was employed as a UFC for Fe(II)/Fe(III) speciation analysis under the control of H2O2. The detection limits of Fe(II)/Fe(III) were 6.16 ng/mL and 4.48 ng/mL, with relative standard deviations of 1.1% and 2.0%, respectively. This method was successfully utilized in the analysis of Fe(II)/Fe(III) in multiple real samples.

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Acknowledgments

The authors acknowledge the financial support from the National Natural Science Foundation of China (21375117) and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and Postgraduate research/practice innovation program of Jiangsu province.

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Author notes

  1. Wei Liu and Ouwen Xu contributed equally to this work.

Authors and Affiliations

  1. College of Guangling, College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, 225002, People’s Republic of China

    Wei Liu, Ouwen Xu, Jiawei Li & Xiashi Zhu

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  1. Wei Liu
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  2. Ouwen Xu
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  3. Jiawei Li
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  4. Xiashi Zhu
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Correspondence to Xiashi Zhu.

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Liu, W., Xu, O., Li, J. et al. Synthesis of Poly-Amino Acid Ionic Liquid Up-Conversion Fluorescent Probe and its Application in Fe(II)/Fe(III) Speciation Analysis. J Fluoresc 30, 309–316 (2020). https://doi.org/10.1007/s10895-020-02499-x

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  • DOI: https://doi.org/10.1007/s10895-020-02499-x

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