Electrosynthesis of poly(o-phenylenediamine) in a room temperature ionic liquid

Poly-o-phenylenediamine (PoPD) thin films were synthesized electrochemically on platinum electrodes in the room temperature ionic liquid (IL) N-butyl-N-methylpyrrolidinium (nonafluorobutanesulfonyl)-(trifluoromethanesulfonyl)imide (PYR14IM14). The polymer films were further characterized by electrochemical analysis and the results are compared with those obtained in conventional H2SO4 aqueous solution. The polymer films obtained in the IL-based electrolyte showed a good adherence on Pt and appeared attractive for the realization of biosensors since they showed a good selectivity with respect to the most common interferent compounds. PoPD films deposited from IL-based electrolytes were investigated in solutions containing compounds as ascorbate and acetaminophen, which are common interferents in electrochemical biosensor analysis, and proved satisfying for application in biosensors.