Interaction of Buckminsterfullerene and gamma-cyclodextrine

During the past few years many papers were published on the gamma-cyclodext rin-C-60 interaction. These described different procedures for the synthesi s of a 2:1 inclusion komplex, which can be prepared in solid form and exist s in solution only in the presence of high cyclodextrin excess as a magenta coloured solution or as a yellowish brown colloid both being metastable. T he magenta solution may be stable for half a year at room temperature, then its transformation into a yellowish colloidal solution along with the form ation of a brown precipitate proceeds within a few weeks. On longer boiling of the solutions, the partial oxidation of fullerene with the formation of fullerol seems to be probable.