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TIMS and MALDI TOF of endohedral Lin@C70 (n = 1 – 3) metallofullerenes

J. M. CVETIĆANIN1,* , S. R. VELIČKOVIĆ1, V. R. ĐORĐEVIĆ1, J. B. ĐUSTEBEK1, M. V. VELJKOVIĆ1, A. A. PERIĆ- GRUJIĆ2, O. M. NEŠKOVIĆ1

Affiliation

  1. Vinča Institute of Nuclear Sciences, Department of Physical Chemistry, P.O. Box 522, 11001 Belgrade, Serbia
  2. Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, Serbia

Abstract

Using the ion implantation technique (introducing negatively charged fullerene into a low temperature lithium plasma column by a strong axial magnetic field) endohedral fullerenes Li@C70, Li2@C70 and Li3@C70 were produced. Mass spectral studies (both TIMS-thermal ionization mass spectrometry and MALDI TOF MS - matrix assisted laser desorption ionization time-offlight mass spectrometry) of these endohedral fullerenes provided detailed structural and reactivity information about these unusual species. The fragmentation of the obtained ions is shown to be by a multiple C2 loss (shrink-wrap mechanism). According to the fact that more atoms in the fullerene make the produced endohedral less stable, Li3@C70 shows a big degree of instability. The presence of Li3@C70 was observed on MALDI TOF MS..

Keywords

Endohedral fullerenes, TIMS, MALDI TOF.

Submitted at: Jan. 15, 2008
Accepted at: June 9, 2008

Citation

J. M. CVETIĆANIN, S. R. VELIČKOVIĆ, V. R. ĐORĐEVIĆ, J. B. ĐUSTEBEK, M. V. VELJKOVIĆ, A. A. PERIĆ- GRUJIĆ, O. M. NEŠKOVIĆ, TIMS and MALDI TOF of endohedral Lin@C70 (n = 1 – 3) metallofullerenes, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 6, pp. 1505-1507 (2008)