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چکیده
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Electrochemistry is defined as the branch of chemistry that examines the phenomena resulting from combined chemical and electrical effects Electrochemical methods were considered due to their high sensitivity, higher efficiency, selectivity, separation and purification Organic electrochemistry is concerned with the reduction and oxidation of organic molecules at the surface of electrodes. The electrochemical reduction of nitro compounds played an important role in the development of organic electrochemistry. Compounds which containing Nitro groups are valuable building blocks because of their convenient transformation into a wide variety of synthetically important compounds such as amines, carboxylic acids, aldehydes, and nitriles. The nitro group is one of the most versatile and useful functional groups in organic synthesis and is an excellent electron acceptor. The reduction of polynitroaromatic compounds is complicated by multi-step processes. 2,4- Dinitrophenylhydrazine (DNPH) is a mutagenic agent and is commonly used as a reagent for the detection of aldehydes and ketones. DNPH contains three main functional groups that can oxidized and reduced at the surface glassy carbon electrode. Two nitro group in m-position and, hydrazine moiety (NH-NH2). Based these data, DNPH is a three functional molecule that indicate an interest voltametric shape. In negative-going scan, the nitro groups can individually reduced and indicated two reduction peaks. In positive-going scan, the hydarin moiety is oxidized to N=NH functional group. In this study, a comprehensive electrochemical behavior of DNPH has been performed via cyclic voltammetry and chronoamperometry techniques. At first, electrochemival study of DNPH was carried out in different pH and green condition. All of reduction and oxidation peaks are shifted to negative value with increasing basic media. In following, the number of electrons and protons were calculated via pourbiax diagram (E-pH). For more data, diffusion
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