ANALYSIS OF C-60 DERIVATIVES BY FAST-ATOM-BOMBARDMENT MASS-SPECTROMETRY AS GAMMA-CYCLODEXTRIN INCLUSION COMPLEXES

Many C60 derivatives form stable complexes with gamma-cyclodextrin in a ratio of 1:2. These complexes can be easily analyzed by fast-atom bo mbardment mass spectrometry (FAB). Unlike the analysis of C60 derivati ves directly by FAB, the spectra of these complexes were characterized by molecular ions with little or no fragmentation. The analysis of th ese complexes by FAB provides an easy and useful approach for the char acterization of C60 derivatives. Most likely due to the size of the ca vity, this approach is limited to C60 derivatives with molecular weigh ts not significantly larger than that of C60 itself.