MASS-SPECTROMETRY OF PERFLUOROALKYLATED BUCKMINSTERFULLERENE - A CASEFOR SEQUENTIAL GAS-PHASE DOUBLE-ELECTRON CAPTURE

Electron attachment mass spectra of the products of fluoroalkyl radica l additions to C-60 show intense molecular ions as well as ions produc ed by attachment of two electrons to the gas phase molecules. Remarkab ly, little fragmentation is observed for these fluorocarbon derivatize d fullerenes, suggesting that electron attachment is occurring on the highly electron deficient C-60 rather than the fluorocarbon side chain s. Perfluoroalkylated C-60 compounds are sufficiently volatile to be u sed as mass references for high-mass electron attachment mass spectrom etry. These compounds are also found to produce molecular ions by nega tive ionization matrix assisted laser desorption ionization mass spect rometry.