ANODIC WAVES OF 9,10-PHENANTHRENEQUINONE IN ALKALINE MEDIA

9,10-Phenanthrenequinone yields at pH > 11 anodic waves, which correspond to a formation of a slightly soluble salt of mercury formed in the reaction of Hg22+ with the product of a reaction of the quinone with two OH- ions. Anodic waves are a linear function of phenanthrenequinone concentration up to about 1 × 10-4M and are affected by adsorption at higher concentrations. The concentration limit depends on the cosolvent used and decreases in the sequence MeOH > EtOH > n-PrOH. At given concentrations of phenanthrenequinone and of OH- ions the anodic current decreases with increasing alcohol concentration. © 1991.