Electrochemical characterization of a mixed self-assembled monolayer of 6-thioguanine and guanine on a mercury electrode.
A monolayer constituted by chemisorbed 6-thioguanine and physisorbed guanine molecules was formed on a hanging mercury drop electrode from deoxygenated solutions of 6-thioguanine (6TG) and guanine (G). The mixed monolayer was characterized by chronoamperometry, cyclic voltammetry, and phase-sensitive ac voltammetry under in situ conditions, and the experimental data revealed a compact packing of molecules in the film. Ex situ measurements in the presence of dissolved oxygen proved that the mixed monolayer is stable in solutions lacking 6TG and G.
González Arias
Zoraida
Z
Departamento de Química Física y Analítica, Universidad de Oviedo, E-33071 Oviedo, Asturias, Spain.
Muñiz Alvarez
Jesús Luis
JL
López Fonseca
Juan Miguel
JM
D004563:Electrochemistry; D004566:Electrodes; D006147:Guanine / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D013866:Thioguanine / Q000737:chemistry*
D006147:Guanine; D013866:Thioguanine; D008628:Mercury; D010100:Oxygen