Electrochemically deposited polymer-coated gold electrodes selective for 2,4-dichlorophenoxyacetic acid

Electropolymerized membranes on gold electrodes doped with 2,4-dichlorophenoxyacetic acid (2,4-D) were prepared from a solution containing resorcinol, o-plienylenediamine and 2,4-D. Fourier Transform Infrared (FTIR) spectroscopy was used to evaluate the incorporation and interaction of 2,4-D with the polymer matrix prior to and after the sensing experiments. The FTIR data indicate that 2,4-D does not leach appreciably from the polymer matrix under experimental conditions employed for the sensing studies. The electrochemical current response for 2,4-D is compared for the doped polymer-coated and control polymer-coated electrode. The response of the doped polymerelectrode was dependent on increasing concentrations of 2,4-D and 2,4-dichlorophenol while unresponsive to benzoic acid.