Author/Authors :
Inoue، نويسنده , , T. and Kubozono، نويسنده , , Y. and Kashino، نويسنده , , S. and Takabayashi، نويسنده , , Y. and Fujitaka، نويسنده , , K. and Hida، نويسنده , , M. and Inoue، نويسنده , , M. and Kanbara، نويسنده , , T. and Emura، نويسنده , , S. and Uruga، نويسنده , , T.، نويسنده ,
Abstract :
Eu endohedral C60, Eu@C60, has been extracted with aniline from soot prepared by arc-heating of a graphite/Eu2O3 composite rod and obtained at high concentration by combining sublimation and repeated high-performance liquid chromatography. The laser desorption time-of-flight mass spectrum showed a pronounced peak of Eu@C60+. The UV–VIS absorption spectrum of this sample has a red-shift in the onset (>900 nm) in comparison with those for C60 and C70, as expected from electron transfer from the Eu atom to the C60 cage. The valence state of the Eu atom in Eu@C60 has been determined to be +2 by Eu LIII-edge XANES.
