The copolymers of o-toluidine (OT) with anthranilic acid (AA) was electrochemically synthesized on indium tin oxide (ITO) conducting glass electrode by potentiostatic method at a potential of 0.9 V in sulfuric acid of 0.5 mol/L. The electropolymerizations in the present study was followed by in situ UV-vis spectrometry, which shows the rate of electropolymerization decreased as the concentration of anthranilic acid in reaction solution. The homo/copolymers deposited on ITO electrode was characterized using FTIR and scanning electron microscope (SEM). The FTIR spectra of homo/copolymers indicated that OT can be copolymerized with AA by potentiostatic electrolysis. The SEM images of the copolymers from 200 mmol/L OT/50 mmol/L AA and 150 mmol/L OT/50 mmol/L exhibit that copolymers have a smaller granular compact morphology in comparison with poly(o-toluidine), which also indirectly shows that the electrocopolymerization of OT and AA should happen.

Key words: o-toluidine, anthranilic acid, electrocopolymerization, UV-Vis spectrometry, FT-IR, SEM