Oxidation of 2-aminoquinoline at a stationary pyrolytic graphite electrode

The oxidation of 2-aminoquinoline was studied at a stationary pyrolytic graphite electrode in methanol-phosphate buffer at 25°C using various electroanalytical techniques. In the entire pH range (2.2–10.4), 2-aminoquinoline is oxidized and exhibits a well defined oxidation peak following a 2e^?, 2H⁺ process to give, 2,2′-azoquinoline as the major product. The linear relationship between peak current at a pyrolytic graphite electrode and concentration indicated that 2-aminoquinoline can be determined in the concentration range 0.1–1.0 mM. On the basis of cyclic voltammetry, spectral studies and controlled-potential coulometry, a mechanism of the electrode process is proposed.