X線回折法による金属内包フラーレンの構造研究

抄録

Endohedral metallofullerenes are novel forms of fullerene-related materials, which encage metal atom inside a carbon cage. The recent X-ray structural studies of metallofullerenes, Sc@C₈₂ and Sc₂@C₈₄, by the synchrotron powder diffraction experiment are presented to illustrate the usefulness of the MEM/Rietveld analysis, which is a self-consistent iterative way in combination with the MEM (Maximum Entropy Method) and Rietveld analyses. The obtained MEM charge densities clearly reveal the distinct features of encapsulated metals inside the fullerene cages as well as endohedral cage structures for Sc@C₈₂ and Sc₂@C₈₄.