Conducting polymers (CPs) such as polyaniline (PAn) have been studied extensively due to their electronic application including energy storage devices, batteries, electrochemical sensors and others [1-2]. These applications have prompted studies of the electropolymerization of aromatic hydrocarbons containing hydroxyl or amine groups. 1,5-Diaminonaphthalene (Fig. 1) is an organic compound with two NH2 groups, as an electrochemical substance is interest for electrochemical studying and has been used for the preparation of polymeric film-coated electrode [3]. In this paper, the electrochemical polymerization of 1,5-diaminonaphthalene (1,5-DAN) on the gold electrode in 1.0 M HClO4/ethanol solution have been studied by the repeated potential cycling method. The electropolymerizaetion of 1,5-DAN in the absence and presence of nanoparticles (Titanium dioxide) were carried out in the potential range between -0.2 and 0.9 V. The polymer films were observed on the elctrode surfaces after 60 cycles. The polymer films were characterized by FT-IR spectroscopy and conductivity measurments. Moreover, the effect of nanoparticles on electropolymerization process and polymer backbone were investigated.
