Effect of the light-induced charge generation in fullerene derivative

A light-induced charge generation is reported in a new fullerene malonate derivative. The monovalent fullerene anionic form was detected by ESR method in temperature below freezing point of the system. The origin of the ESR signal was confirmed by ESR studies of negatively charged fullerene derivative obtained in electrolytic process. The anionic form of the malonate fullerene derivative generated electrochemically gives ESR signal stable in changing temperature. Its characteristics (g value, width and temperature behavior) are similar to that for the narrow signal of the negatively charged C60−. Electrochemical and VIS/NIR studies of C60 and the fullerene malonate derivative as well as ESR spectrum of C60− are also reported.