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Abstract
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Background: Electrochemical methods are widely applied to obtain both thermodynamic and kinetic information about reactions of organic and inorganic species over a wide time frame. This method provides a versatile means for the selective reduction and oxidation of organic compounds. Unique selectivity due to in situ formation of an active species at the interface, inversion in polarity by transfer of an electron and variability, in product formation by the control of the electric potential are some of the advantages of electrosynthesis [1-2]. Methods: In this study, electrochemical synthesis of new dye was carried out by the electrochemical oxidation of 4-nitroso-N,N-dimethylaniline in aqueous ethanol at pH 2.0, divided cell and gave the pure product. We investigated and studied this product by using cyclic voltammetry and controlled-potential coulometry. These methods are the one-pot and environmentally friendly electrochemical approach for the synthesis of new dye compound via the Michael type addition reaction of anodically generated p-quinonediimine with 4-nitroso-N,Ndimethylaniline [3], at a carbon electrode, without toxic reagents. Results: In the next, we used the so-called exhaust process for the dyeing of wool, nylon, polyester, cotton and acrylic. The results showed that synthesized dye (violet dye) exhibits a higher affinity for acrylic, nylon and wool fabrics, but it was ineffective against other fabrics. Conclusion: The present methods for the synthesis of Violet dye have several advantages. Both processes are practically convenient to carry out and can be performed at atmospheric pressure and room temperature. Neither catalyst nor organic/inorganic oxidizing agents are necessary and the reaction can be performed under sustainable and green conditions.
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