Abstract
The electro-oxidation of bilirubin (BR) in aqueous solution was investigated by cyclic voltammetry and in-situ thin-layer spectroelectrochemical techniques. It was found that both oxidation processes of BR are two electron transfer reactions. A mechanism for the electro-oxidation of BR in aqueous solution has been proposed. The electro-oxidation behavior of bilirubin + human serum albumin (BR + HSA) complex was also studied. Conformational changes in the BR + HSA complex during electro-oxidation, as reviewed by in-situ circular dichroism (CD) electrochemistry, are reported for the first time. A mechanism for the changes in the CD spectra of the complex during electro-oxidation is proposed.
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