Abstract
Nd@C 82 has been isolated with a purity of ∼99.9% by an efficient solvent extraction procedure, followed by HPLC separation. UV-VIS-NIR absorption spectra of the metallofullerenes were measured in a wavelength range from 300 to 2100 nm. The spectral features are remarkably similar to those of La@C 82 and Ce@C 82, a finding which suggests a similar magnitude of charge transfer from the metal atoms to the carbon cage for these species M@C 82 (M = rare earth element). A study using X-ray photoelectron spectroscopy (XPS) suggests that the electronic structure of Nd@C 82 can be approximately represented by Nd 3+@C 82 3−.
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