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An electrochemical sensing platform based on a new Cd(II)-containing ionic liquid for the determination of trichloroacetic acid and bromate

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Abstract

The present work reports on the synthesis, characterization and performance of a new metal-containing ionic liquid [(C3H7)2-bim]2[CdCl4] (bim = benzimidazole) as an electrocatalyst for trichloroacetic acid (TCA) and bromate reduction. The structure of Cd(II)-containing ionic liquid (Cd-IL) was characterized by X-ray crystallography, IR spectroscopy, and elemental analysis. The molecular structure contains two independent cations of 1,3-dipropyl-benzimidazolium and one anion of CdCl 2−4 . The cadmium atom has a tetrahedral geometry by coordinating to four chlorine atoms. The melting point of Cd-IL is 73 °C. Electrochemical properties of the Cd-IL have been investigated by preparing bulk-modified carbon paste electrode, and Cd-IL is used as a binder and an electrocatalyst. This modified electrode has good electrocatalytic activity toward reduction of TCA and bromate. The detection limit and the sensitivity are 0.01 μM and 102.72 μA μM−1 for trichloroacetic acid detection and 0.003 μM and 496.15 μA μM−1 for bromate detection. This work demonstrates that the Cd-IL may become a new kind of functional material in constructing chemicals and biosensors.

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Acknowledgment

This work was supported by the Natural Science Foundation of Shandong Province (No. Z2007B01), People’s Republic of China.

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Authors and Affiliations

  1. New Materials & Function Coordination Chemistry Laboratory, Qingdao University of Science and Technology, Qingdao Shandong, 266042, People’s Republic of China

    RuiRui Zhuang, FangFang Jian & KeFei Wang

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  1. RuiRui Zhuang
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  2. FangFang Jian
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  3. KeFei Wang
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Corresponding author

Correspondence to FangFang Jian.

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Zhuang, R., Jian, F. & Wang, K. An electrochemical sensing platform based on a new Cd(II)-containing ionic liquid for the determination of trichloroacetic acid and bromate. Ionics 16, 661–666 (2010). https://doi.org/10.1007/s11581-010-0448-8

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