Isolation and Characterization of Pr@C₈₂ and Pr₂@C₈₀

Abstract

Pr@C82 and Pr2@C80 have been isolated with a purity of >99.0% by an efficient solvent extraction procedure, followed by HPLC separation. UV−VIS−NIR spectra of the metallofullerenes were measured in the wavelength range from 300 to 2100 nm. The X-ray photoelectron spectra of Pr@C82 and Pr2@C80 suggest that the Pr atoms inside the carbon cages all exist in a cationic form represented by Pr3+.