Photoinduced Electron Transfer to Fulleropyrrolidinium Salts Studied by EPR

Abstract

Abstract The photoinduced formation of fullerene anion radicals from mono- and bis-N-methylfulleropyrrolidinium salts in the presence of TiO2 or triethylamine as electron donating substrates was investigated using in situ EPR spectroscopy in various solvent mixtures. The photoreduction yield and stability of anion radicals generated are affected by the solvent properties, such as relative permittivity and hydrogen bond donation ability.