Comparative studies of the interfacial behaviour of some nucleic acid bases with and without thio group

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

“…In a recent report [14] the adsorption behavior of 6TG on a mercury electrode has been studied with ac and cyclic voltammetry and the existence of several condensed phases of chemically or physically adsorbed 6TG in a wide potential range have been reported. The authors found some differences in the condensed phases formed by 6TG in comparison with those previously described [15] and these differences are explained on the basis of the influence of the electrolyte nature and concentration used.…”

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

“…A low-density monolayer of Hg-SR molecules and a CM of physisorbed (RSH) ones, resulting from reduction of the SAM, were also studied. To the best of our knowledge, only one study of adsorption of 6TGR on Hg, which was performed under conditions rather different from those in this work, has been published [35].…”

Electrochemical characterization of a mixed self-assembled monolayer of 6-thioguanine and guanine on a mercury electrode

“…Such interactions and the reduced flexibility of the purine rings lead to the formation of ordered monolayers, and the occurrence of a CM of guanine (G) on mercury electrodes (constituted by physisorbed molecules) has been reported [9,10]. On the other hand, we have found that 6-thioguanine (6TG) can be chemisorbed (as an R-S-Hg adsorbate) or physisorbed (as an R-SH adsorbate) on the hanging mercury drop electrode (HMDE), depending on the applied potential [11].…”