Visible and near-IR spectroscopy of endohedral Gd@C82(C2v) and Ho@C82(C2v) metallofullerenes and their monoanions

Resumo

Solutions of endohedral Gd@C₈₂(C_2v) and Ho@C₈₂(C_2v) metallofullerenes are studied by means of visible and near-IR spectroscopy upon their conversion from neutral to the anionic form via a redox reaction with the electron donor potassium perchlorotriphenylmethide K(18-crown-6)[C(C₆Cl₅)₃]. The concentrations of the studied solutions of endohedral Gd@C₈₂(C_2v) and Ho@C₈₂(C_2v) metallofullerenes in o-dichlorobenzene were determined from the spectroscopic data, and their molar extinction coefficients are calculated.