We have developed a single-step method for selectively extracting endohedral metallofullerenes. In this new method, a mixed solvent of triethylamine and acetone is used to extract endohedral metallofullerenes from raw soot. The efficiency of extraction was investigated by extracting Ce-containing metallofullerenes, Ce@C82 and Ce2@C80, from raw soot obtained by an arc discharge technique. The resultant extract contained little or no empty fullerenes such as C60 or C70, that is, the Ce-metallofullerenes were selectively extracted.
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