This can also be confirmed by electrochemical measurements, as discussed in Figure S.2.5. Combining all the observations extracted from Bidim-SEC experiments, it can be concluded that TDMQ20 oxidation is a complex process taking place in multiple steps. The irreversible oxidation of TDMQ20 leads to the formation of a variety of products. Part of the products are irreversibly adsorbed on the C-SPE surface. This interaction probably happens through interaction with the N groups of the aliphatic chain of TDMQ20. Simultaneously, at least two soluble products are formed during the oxidation, as can be confirmed by the evolution of two positive bands at 240 and 289 nm with slight differences on its behavior (Figure ).