Author/Authors :
Kato، نويسنده , , Haruhito and Suenaga، نويسنده , , Kazutomo and Mikawa، نويسنده , , Masahito and Okumura، نويسنده , , Masafumi and Miwa، نويسنده , , Naoto and Yashiro، نويسنده , , Arihiro and Fujimura، نويسنده , , Hidefumi and Mizuno، نويسنده , , Akiko T. Nishida، نويسنده , , Yoshihiro and Kobayashi، نويسنده , , Kazukiyo and Shinohara، نويسنده , , Hisanori، نويسنده ,
Abstract :
Various water-soluble multi-hydroxyl fullerenes (fullerenols), C60(OH)n, C70(OH)n and C84(OH)n, and a Gd metallo-fullerenols, Gd@C82(OH)n have been synthesized by the Kitazawa method. Elementary chemical analyses indicate that all of these fullerenols have 30–40 hydroxyl groups and 11–15 coordinated water molecules via hydrogen bonds. Electron energy loss spectroscopy (EELS) on Gd@C82 fullerenols shows that the π∗ peak area in the C K-edge spectra decreases on going from intact Gd@C82 metallofullerene to Gd@C82 fullerenols, indicating an increase in sp3 character of the fullerenols. Furthermore, Gd M4,5-edge EELS spectra show that the encapsulated Gd atom has a trivalent Gd3+ state.
