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  • 1 Tokyo Metropolitan University Graduate School of Science Hachioji, Tokyo 192-0397 Japan
  • | 2 Japan Atomic Energy Research Institute Advanced Science Research Center Tokai-mura, Ibaraki 319-1195 Japan
  • | 3 Japan Atomic Energy Research Institute Advanced Science Research Center Tokai, Ibaraki 319-1195 Japan
  • | 4 Tokyo Metropolitan University Graduate School of Science Minami-ohsawa, Hchioji, Tokyo 192-0397 Japan
  • | 5 Tokyo Metropolitan University Graduate School of Science Hachioji, Tokyo 192-0397 Japan
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Abstract  

We have, previously, reported on the HPLC elution behavior of the Th, Pa, U, Np, and Am metallofullerenes and the UV/vis/NIR absorption spectra of the Th@C84 and U@C82 species. In this paper, the followings are reported: (1) Pu metallofullerenes were produced and their HPLC elution behavior was investigated using a radiotracer technique. The HPLC chromatogram of this metallofullerene was found to be almost the same as that of the Np and Am metallofullerenes. (2) The oxidation states of Th@C84 and U@C82 produced in macroscopic quantities were examined by XANES (X-ray absorption near edge structure) measurements. The oxidation state of the U atom in the C82 fullerene cage was estimated to be 3+ with the formal charge of the ionic molecule being U3+@C823-.