4.7 Article

A new ionic liquid comprising lanthanum(III) bulk-modified carbon paste electrode: preparation, electrochemistry and electrocatalysis

Journal

DALTON TRANSACTIONS
Volume -, Issue 23, Pages 4532-4537

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/b900046a

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Funding

  1. Natural Science Foundation of Shandong Province P. R. China [2007BS04046]

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A new metal-containing ionic liquid of [(C4H9)(2)-bim](3)[La(NO3)(6)] (bim = benzimidazole) was synthesized and the structure was characterized by X-ray crystallography, IR and elemental analysis. The molecule contained three independent cations of benzimidazolium and two independent anions of La(NO3)(6)(3-). The center lanthanum had a cuboctahedral geometry by coordinating to twelve oxygen atoms from six nitrates. Moreover, the electrochemical properties of the title complex bulk-modified carbon paste electrode (La-CPE) have been studied, and the results indicate that the La-CPE has good electrocatalytic activities towards the reduction of hydrogen peroxide, nitrite, bromate and trichloroacetic acid (TCA). This modified electrode has good reproducibility, high stability, low detection limit, technical simplicity and the possibility of rapid preparation, which is important for practical application on electrochemical sensors.

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