A comparative study of the electrochexmcal oxldatlon of N,N-dlmethyl-1-naphthylamme (DMN) m emulsified water-mtrobenzene mixtures with different electrolytes and con&Ions was performed by quasi-stationary current-potential curves, cychc voltammetry, controlled potential electrolysis and rotatmg disk electrode expenments, combmed with conventlonal analytIca techmques
The anochc oxidation mechamsm of DMN m the two-phase system IS snmlar to that m non-aqueous solvents However due to the lomc nugratlon across the hqmd-hqmd interface, the product N,N,N',N'tetramethyl-l,l'-naphthldlne &cation (TMN*') remains m the organic phase while the protons migrate to the aqueous phase This results m an appreciable increase m the yield of the organic product compared with the one obtained m one-phase non-aqueous electrolysis The nature of the anions of the supporting electrolyte used m the aqueous phase of the emulsified systems exerts a direct influence m the rate of DMN oxidation which correlates with their Gibbs transfer energy
The effect of the addltlon of surfactants such as sodium dodecylsulphate (SDS) and Brig 35 to this systems was also investigated SDS practically mlublt the reaction However Brig 35 exerts a catalytic effect by a mlcellar mechanism m combmation with the hqmd-hqmd interface and no supportmg electrolyte IS needed m the 011 phase