Synthesis of Endohedral 133Xe-Fullerenol by Using Higher Fullerene

Abstract

2.1. Production of endohedral higher 133Xe-fullerenes. The endohedral higher 133Xe-fullerenes (133Xe@C76 and 133Xe@C8 4) were synthesized in a manner as described in detail in our previous paper. Fullerene targets for ion implantation were prepared by vacuum evaporation of fullerenes (C76 or C84) on Ni foil. Xenon-133 ions were implanted into the targets with an isotope separator (Takasaki Institute, JAEA) at an acceleration energy of 30 keV. After the ion implantation, the fullerenes on the target foil were dissolved in o-dichlorobenzene. The solution was filtered through a membrane filter of 0.2 ƒÊm in pore size (Millipore, JGWP) to remove insoluble materials. The filtrate was purified by HPLC with a Cosmosil Buckyprep Figure 1. A Schematic diagram of a synthetic procedure for 133 Xe@C76(OH)x. The same proedure was also used for 133Xe@C60 (OH)x, 133Xe@C70(OH)x, and133Xe@C84,(OH)x.