Abstract

Two new complexes, [Co(C3H7-bim)2Br2] and [Co(C5H11-bim)2Br2], have been synthesized and the structures characterized by X-ray crystallography, IR spectroscopy, and elemental analysis. The cobalt atoms of the two complexes both adopt distorted tetrahedral geometry. The electrochemical behavior of and electrocatalysis by the propyl complex bulk-modified carbon paste electrode have been studied by cyclic voltammetry. It has good electrocatalytic activity toward reduction of trichloroacetic acid (TCA) and bromate. The detection limit and the sensitivity are 0.01 μM and 60.93 μA μM−1 for TCA detection, and 0.02 μM and 43.94 μA μM−1 for bromate detection. This modified electrode has good reproducibility, high stability, low detection limit, technical simplicity, and possibility of rapid preparation, which is important for practical application.

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