Abstract
I.The fluorescene emission of pyrene was quenched by C60 in various hydrocation solvent, such toluene isodurene etc. The Stern-Volmer plot shows that the fluorescene intensity ratio Io/I is upward, and is non linearly proportional to the fullerene concentration. Electronic absorption measurmes show that pyrene and C60 do not form static complex under the current experimental condition. At a given C60 concentration, increased either solvent polarity or temperature affords diminishment in the ratio . The fluorscene quenching behavior by C70 shows a similar pattern . The data strongly suggest that even at concentration far below saturation, Stern-Volmer fullerene forns aggregates in Organic solvent.II.a stable, broad ESR signal of C60-. anion radical was generated by irradiation of a C60-toluene solution in the presence of organic salt, [(Ph)3P]2N+(Ph)4B-, and 14.3 % methanol. Upon exposure to molecular oxygen, the broad band gradually diminishes and a narrow band of g = 2.0008 and Hpp = 3.32 G grow, which further transforms to another narrow band of g = 2.0026 and Hpp = 1.67 G .The transforation rate found to be negnetive temperature dependent, the higk temperatures and the slower the transfomation .