ANALYSIS OF METALLOFULLERENES USING A MASS REFLECTRON

A high-resolution mass reflectron has been used to analyze an extract of a fullerene mixture containing the metallofullerene Gd@C-82 It is s hown that various metallofullerenes can be analyzed by means of therma l desorption followed by electron impact ionization. The C-60, C-82, a nd Gd@C-82 ion currents are obtained as functions of the evaporation t emperature. Doubly charged (Gd@C-82)(2+) metallofullerene ions are ide ntified in the mass spectra. (C) 1998 American Institute of Physics. [ S1063-7850(98)00103-7]