Formation and special solubility of endohedral thulium metallofullerenes

Endohedral metallofullerenes Tm@C-2n were synthesized with the carbon-arc discharge method of activating the Tm2O3-containing graphite anode in situ and back-burning technique, Toluene soxhlet extraction, toluene and pyridine high-temperature and high-pressure extraction technique were employed for the effective extraction of Tm@C-2n. The formation of Tm@C-2n was confirmed by LD-TOF and DEIMS characterization. The mass spectrometric results indicate that Tm@C-2n have a better solubility in toluene and worse solubility in pyridine than other metallofullerenes.