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Endohedral nitride cluster fullerenes:Formation and spectroscopic analysis of L 3− x M x [email protected] 2 n (0≤ x≤3; N=39,40)

Journal of Physics and Chemistry of Solids
Publication Date
DOI: 10.1016/j.jpcs.2003.03.002
  • Chemistry


Abstract The class of endohedral fullerenes is demonstrated in its large variety by the new type of nitride cluster fullerenes. These endohedral fullerenes were obtained as the most abundant fullerenes in the soot extract. This is reached by the concept of reactive gas atmosphere in arc burning fullerene production. The chemical reactions in the gas atmosphere during the production are described. Different nitride cluster fullerenes were produced with selectivity up to 90% by using reactive gas addition to the cooling gas of the arc burning process. Fullerenes prepared by this method are Sc [email protected] 80, Sc 3− x Er x [email protected] 80 ( x=1,2,3), Sc [email protected] 78, Y [email protected] 80, Ho [email protected] 80 and Tb [email protected] 80. By studying Vis/NIR spectra, it is demonstrated that nitride cluster fullerenes are generally large band-gap endohedrals. Therefore, the M [email protected] 80 structures are very stable and suitable for applications. This stability is caused by a charge transfer from the cluster to the carbon cage and the formation of a M 3N–carbon cage bond as well as covalent metal–nitrogen bonds. Infrared spectroscopy of M [email protected] 80 was used to study the metal and cage size influence on the structure of the nitride cluster.

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