Surface activity and antistatic properties of some pyridinium compounds

Substitution at a carbon atom of the pyridine ring was shown to cause a ris e in the surface activity and a change in the molecular orientation of pyri dine compounds at the interface. High-molecular-weight pyridinium salts had especially high surface activities that correlated with their antistatic p roperties. Adsorption parameters of the compounds investigated were calcula ted, and the results obtained indicated segmental adsorption of the polymer compounds. It was disclosed that the surface activity of the pyridinium sa lts was increased at the bismuth electrode-solution interface in comparison with the free surface of the solution.