Adsorption and orientation of coumarin molecules on mercury—II

Double-layer forces in ionic micellar solutions

“…Griffiths and Westmore11•12 first reported the strong adsorption of coumarin at the interface between mercury and aqueous 0.1 M KC1, and its effects on the polarographic reduction of nickel ions. These observations were extended by Partridge et al13,14 who concluded that, depending on the applied potential, coumarin in aqueous 1 M Na2S04 adsorbs in one of two different orientations, one parallel to the electrode surface, the other perpendicular to it, a conclusion essentially confirmed by Damaskin et al 15 More detailed studies of the adsorption of coumarin in a variety of aqueous electrolytes were reported by Moussa et al 16,17 Authors from that same laboratory also reported that adsorbed coumarin strongly inhibits the reduction of Cd(II) and of Pb(II) from 1 N H2S04 and 1 N HC104, respectively.18,19 In none of…”

Complex voltammetric and fractal study of adsorbed layer’s structure of pure Triton-X-100 and in mixture with o- or p-nitrophenol

“…This effect is efficiently accounted for by using modified Flory-Huggins (F-H) isotherm [28,29], that, besides the coefficient of lateral interaction includes an additional parameter n that describes the number of solvent molecules displaced by one adsorbing molecule.…”