S.M. Grannan, J.T. Birmingham, et al.
Chemical Physics Letters
We describe an automated HPLC separation of the endohedral metallofullerenes such as Sc@C2n and Y@C2n from emptycage fullerenes utilizing two polystyrene chromatographic columns (500 and 1000 Å) in series. Rapid separation of the metallofullerene fraction from the empty-cage fullerenes (e.g., C60) under anaerobic conditions is achieved. For the isolated Sc@C2n fraction, all even-carbon-membered species from Sc2@C74 to Sc2@C104 were identified by negative-ion chemical ionization mass spectrometry. In addition, Sc3@C82 was a prominent component of this fraction. For the separated Y@C2n sample, the mass spectral data indicate the presence of Y@C82 and all even-carbon-numbered diyttrium species from Y2@C82 to Y2@C104. © 1994, American Chemical Society. All rights reserved.
S.M. Grannan, J.T. Birmingham, et al.
Chemical Physics Letters
P.H.M. Van Loosdrecht, R.D. Johnson, et al.
Physical Review Letters
S. Stevenson, P. Burbank, et al.
Journal of Physical Chemistry A
S. Stevenson, H.C. Dorn, et al.
Analytical Chemistry