A layered ionic crystal of polar Li@C-60 superatoms

作者：Aoyagi Shinobu; Nishibori Eiji; Sawa Hiroshi^*; Sugimoto Kunihisa; Takata Masaki; Miyata Yasumitsu; Kitaura Ryo; Shinohara Hisanori; Okada Hiroshi; Sakai Takeshi; Ono Yoshihiro; Kawachi Kazuhiko; Yokoo Kuniyoshi; Ono Shoichi; Omote Kenji; Kasama Yasuhiko; Ishikawa Shinsuke; Komuro Takashi; Tobita Hiromi

来源：Nature Chemistry, 2010, 2(8): 678-683.

DOI：10.1038/NCHEM.698

If the physical properties of C-60 fullerene molecules can be controlled in C-60 products already in use in various applications, the potential for industrial development will be significant. Encapsulation of a metal atom in the C-60 fullerene molecule is a promising way to control its physical properties. However, the isolation of C-60-based metallofullerenes has been difficult due to their insolubility. Here, we report the complete isolation and determination of the molecular and crystal structure of polar cationic Li@C-60 metallofullerene. The physical and chemical properties of Li@C-60 cation are compared with those of pristine C-60. It is found that the lithium cation is located at off-centre positions in the C-60-I-h cage interior and that the [Li+@C-60] salt has a unique two-dimensional structure. The present method of purification and crystallization of C-60-based metallofullerenes provides a new C-60 fullerene material that contains a metal atom.

• 出版日期2010-8