A new copper(II) polymer and its application in dopamine detection

What is it about?

Reaction of bis(3,5-dimethyl-1-pyrazolyl)methane (L) with CuCl2 and NaNCS yielded the new coordination polymer [Cu2(l-SCN)3(L)2], which was isolated as a brown and air-stable solid. As an application, the copper polymer was used to modify a fluorine-doped tin oxide (FTO) electrode covered with poly(3,4-ethylenedioxythiophene). This electrode was tested for the detection of dopamine (DA) in the presence of ascorbic acid (AA) in a PBS solution at pH 7.4.

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Why is it important?

The presence of the new copper polymer diminished the charge transfer resistance of the surface allowing the detection of DA by differential pulse voltammetry. The calibration curves for DA showed two linear ranges from 0.6 to 9.0 microM and from 10.0 to 200.0microM. The sensitivity of the lowest concentration range was 0.336 microA microM-1 cm-2.