A highly improved method for purification of fullerenes applicable to large-scale production

作者：Komatsu N^*; Ohe T; Matsushige K

来源：Carbon, 2004, 42(1): 163-167.

DOI：10.1016/j.carbon.2003.10.009

• fullerene
• activated carbon
• adsorption, chromatography

Purification of fullerenes was accomplished by filtration of fullerene extract through a thin layer of activated carbon. Under the optimum conditions, chlorobenzene was used as eluent to diminish the volume of solvent remarkably. The thickness of the carbon layer was only 3-17 mm (activated carbon/fullerene mixture (w/w) = 1/3-1/10) enough to obtain pure C-60 in good yield. The method presented here is much more convenient than column chromatography commonly used so far and can be applicable to large-scale production of pure C-60 and C-70. From a mechanistic point of view, fullerenes are considered to be discriminated in the activated carbon pores which have a little larger diameter than the size of fullerenes (1.0-2.0 nm) by pi-pi interaction between fullerene surface and fused aromatic rings composing the pores.

• 出版日期2004