An electrochemical study of 6-thioguanine monolayers on a mercury electrode in acid and neutral solutions

Formation and electrochemical characterization of 6-thioguanosine monolayers on the mercury surface

“…More recently, a SAM of 6-thioguanine (6TG) supported on Hg has been extensively studied with various electrochemical techniques [30][31][32][33]. It was found that the potential region of stability for this densely packed SAM is wider than that for the 6MP SAM, which is in agreement with the fact that stacking interactions are particularly strong among molecules derived from purine nucleobases.…”

“…As indicated in the Introduction, 6TG monolayers supported on Hg have been studied in detail [30,33]. When the adsorption potential is positive enough, a SAM constituted by chemisorbed molecules is formed at the interface.…”

Oxidation process induced by 2-mercaptopyrimidine at a mercury electrode

“…This means that the "condensed" monolayer of C 4 H 3 N 2 S-Hg does not inhibit such a reaction. In contrast, the product of a similar reaction involving thiopurines forms full monolayers that block further occurrence of that reaction [14][15][16][17][18]. This different behavior is attributed to the fact that ring-ring stacking interactions between pyrimidine molecules are weaker than those between purines.…”

“…The oxidative and interfacial behavior of thiopurines on the HMDE has recently been studied in detail using a variety of voltammetric techniques [14][15][16][17][18]. A similar investigation in relation with 2MP has not yet been reported.…”

A theory of square-wave voltammetry of surface-active, electroinactive compounds

“…The measurement of ac current as a function of electrode potential is called tensammetry [5]. It is used for the determination of adsorption parameters [2,6], the influence of SAS molecular structure on the SAS surface activity [3,7], the structure of adsorbed layer [8][9][10][11][12], the reorientation of molecules in the adsorbed layer [13][14][15] and the concentration of SAS in natural waters [16,17].…”