Collect. Czech. Chem. Commun. 1993, 58, 29-40

Adsorption of 2-Thiouracil at the Mercury/Electrolyte Interface II. Capacitance Transients

Thomas Wandlowski and Robert de Levie

Chemistry Department, Georgtown University, Washington DC 20057, U.S.A.


The adsorption of 2-thiouracil at the mercury-water interface exhibits several regions. In region I, the capacitance is consistently higher than that of the supporting electrolyte, as is usually observed for sulfur-containing compounds. At higher concentrations of 2-thiouracil, two additional adsorption regions appear. Region II corresponds to a condensed monolayer, formed by nucleation and two-dimensional growth, while region III exhibits behavior typical for polylayer formation.