The polyaniline (PANI) film deposition during the oxidative polymerization of aniline was studied using the quartz crystal microbalance (QCM) technique. PANI was prepared in the presence and absence of PDAs (p-phenylenediamine (PPDA), o-phenylenediamine (OPDA) and m-phenylenediamine (MPDA)). The effect of PDAs concentrations on the PANI films formation were monitored using QCM technique. It was found that PPDA has an acceleration effect, OPDA has no or little effect and MPDA has retardation effect and work as inhibitor for the PANI film formation. The G(r) and m' increases by increasing PPDA concentrations in the same time induction period and reaction time decreases, in the opposite direction MPDA The G(r) and m' decreases by increasing MPDA concentrations and the induction period and reaction time increases, in the case of OPDA there is no measurable effect on the induction period. G(r), m' and reaction time. UV-vis absorption spectra for the bulk and PANI films deposited onto glass supports were used for justification the data obtained from QCM. The presences of PDAs have no effect on the chemical structure and crystallinity of PANI and were confirmed using FTIR and X-ray. (C) 2011 Published by Elsevier Ltd.