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Study of 2–thiocytosine/ surfactant adsorption at the R-AgLAFe/chlorate(VII) interface – impact of surfactant ionic character

Martyna Marlena, Grochowski Mariusz, Urban Teresa, Nosal-Wiercińska Agnieszka

Physicochemical Problems of Mineral Processing

2022

Vol. 58, iss. 2

art. no. 144322

Effect of 2 – thiocytosine on the parameters of double R-AgLAFe/ chlorate(VII) interface layer in the presence of different surfactants has been studied. There were determined the adsorption parameters such as: differential capacity of the double layer (Cd) at the R-AgLAFe/ basic electrolyte interface; potential of zero charge (Ez) and surface tension at the potential of zero charge (γz). The predominance of 2–thiocytosine in formation of adsorption equilibria of 2–thiocytosine–SDS and 2– thiocytosine–CTAB mixtures as well as the competitive adsorption between molecules 2–thiocytosine-surfactant or mixed micelles was proved. The changes pointing out to different arrangement of SDS or CTAB molecules on the electrode surface also in the presence of 2–thiocytosine were observed.

Effect of azathioprine on the parameters of double Hg/chlorate(VII) interface layer in the presence of nonionic surfactants

Kaliszczak Waldemar, Grochowski Mariusz, Nosal-Wiercińska Agnieszka, Brycht Mariola, Checinska-Majak Dorota, Gołębiowska Beata

Physicochemical Problems of Mineral Processing

2019

Vol. 55, iss. 6

1350--1356

The mixed adsorption of azathioprine and Triton X-100 or Tween 80 at the mercury/ chlorates (VII) interface wasdescribed. The differential capacitance of the double layer Cd at the Hg/ basic electrolyte interface was measured using the electrochemical impedance spectroscopy. The potential of zero charge Ez wasdetermined applying streaming mercury electrode and the surface tension at the potential of zero charge γz was measured by the method of the highest pressure inside the mercury drop. The changes of determined parameters in the function of the supporting electrolyte concentration point with the participation of ClO4-ions in the adsorption process, as well as the electrostatic interactions between the dipoles of H2O and azathioprine–Triton X-100 or azathioprine–Tween 80 in the double layer are shown.

Cognitive Aspects of the Cap-Pair Effect

Sykut K., Dalmata G., Marczewska B., Saba J.

Polish Journal of Chemistry

2004

Vol. 78 / nr 9

1583-1596

The paper discusses the cap-pair rule discovered by the authors. The cap-pair rule is associated with acceleration of electrode processes by organic substances. The mechanism and the kinetics of electrode processes in aqueous solutions and aqueous-organic solvents are discussed. Anew concept of the "piloting ion" to study mixed adsorption layers based on the cap-pair rule is presented.