Application of self-assembled ‘molecular wires’ monolayers for electroanalysis of dopamine

The selective electroanalysis of dopamine (DA) using the self-assembled monolayers of an oligo(phenyleneethynylene)s (OPEs) type molecular wire have been studied for the first time. Cyclic voltammetry measurement showed the OPE modified electrodes preferentially inhibit the electrochemical reaction of ascorbic acid (AA). Using square-wave voltammetry technique, DA was quantitatively determined in the presence of high concentration AA. This work reveals that, besides molecular electronics, biosensor could be an attractive new field of application for the OPE type molecular wires. Keywords: Self-assembled monolayers (SAMs), Molecular wires, Dopamine, Modified electrodes, Oligo(phenylene ethynylene) (OPE)