Permeability and permselectivity of polyphenylenediamine films synthesized at a palladium disk electrode

Three phenylenediamine isomers (including ortho-, meta- and para-derivatives) were electrochemically polymerized on palladium disk electrodes. The permeability and permselectivity of polyphenylenediamine films for hydrogen peroxide, ascorbic acid, uric acid, acetaminophen, and cysteine were compared. The resulting polyphenylenediamine electrodes showed rapid electrochemical responses to hydrogen peroxide and good anti-fouling ability to possible interferences. Experimental results provide useful information for the fabrication of membrane-based enzyme electrodes.