Synthesis of endohedral 133Xe-fullerenol by using higher fullerene

Hydrophilic endohedral 133Xe-fullerenols [133Xe(a)C76(OH)x and 133Xe(a)C84(OH)x] were synthesized from hydrophobic endohedral 133Xe-higher fullerenes (133Xe(a)C76 and 133Xe(a)C84). The endohedral 133Xe-higher fullerenes were produced by implantation of 133Xe ions into fullerene targets (C76 and C84) using an isotope separator. After implantation, the fullerene targets were dissolved in o-dichlorobenzene. The solutions were filtered through a membrane filter to remove insoluble materials. For synthesis of endohedral 133Xe-fullerenols, endohedral 133Xe-fullerenes dissolved in o-dichlorobenzene were shaken with tetrabutylammonium hydroxide and KOH solution for 1 min. On this shaking, endohedral 133Xe-fullerenols formed in o-dichlorobenzene phase. The o-dichlorobenzene phase was separated from the KOH phase, and pure water was added to the o-dichlorobenzene phase. The mixture was shaken for 1 min to extract endohedral 133Xe-fullerenols into pure water phase. The recovery of the 133Xe(a)C76(OH)x and 133Xe(a)C84(OH)x will be discussed in connection with reaction conditions. (author)