Voltammetric behavior of water-soluble endohedral metallofullerene derivatives

Voltammetric behavior of water-soluble endohedral metallofullerene derivatives Gd@C-82(OH)(5)(NHCH2COOH)(9) (GN) and Gd@C-82(OH)(6)(NHCH2CH2SO3H)(8) (GS) was characterized in 0.1 M KCl solution by CV and DPV. They showed similar redox behavior, that is, a reversible electroreduction process on HMDE was found; in the mean time, an irreversible oxidation process and an irreversible reduction process on GC electrodes were also observed. The results reveal that these two water-soluble endohedral metallofullerene derivatives have good electron donating ability and poor electron accepting ability due to hydroxy groups, aminoacetic acid and aminoethyl sulfonic acid connected to the C-82 cage in comparison with Gd@C-82.Chemistry, AnalyticalElectrochemistrySCI(E)3ARTICLE2178-1811