Electrochemical behaviour of 2-[4′-sulphonamoylphenyl]hydrazono-1,3-indanediones

Electrochemical behaviour of 2-[4'-sulphonamoylphenyl]hydrazono-1,3-indanediones was studied in the Britton-Robinson buffers of pH 2.5 to 12.0 at dropping mercury electrode and glassy carbon electrode. At dropping mercury electrode a cathodic differential pulse poiarographic peak is obtained in the pH range 2.5 to 6.5. Cyclic voltammograms exhibited a well defined, irreversible cathodic and anodic peak at glassy carbon electrode. At pH 6.5 and above the reduction peak exhibited a tendency to split into two peaks indicating that the 4e(-)/4H(+) reduction of 2[4'-sulphonamoylphenyl]hydrazono-1,3-indanediones occurs in two one-electron and one two-electron steps. Products of controlled potential electrolysis were characterised by elemental and spectral analysis.