title: A layered ionic crystal of polar Li@C(60) superatoms.
abstract: 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.
authors.affiliation: Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan.
authors.forename: Shinobu
authors.initials: S
authors.lastname: Aoyagi
authors.forename: Eiji
authors.initials: E
authors.lastname: Nishibori
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sawa
authors.forename: Kunihisa
authors.initials: K
authors.lastname: Sugimoto
authors.forename: Masaki
authors.initials: M
authors.lastname: Takata
authors.forename: Yasumitsu
authors.initials: Y
authors.lastname: Miyata
authors.forename: Ryo
authors.initials: R
authors.lastname: Kitaura
authors.forename: Hisanori
authors.initials: H
authors.lastname: Shinohara
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Okada
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sakai
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ono
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kawachi
authors.forename: Kuniyoshi
authors.initials: K
authors.lastname: Yokoo
authors.forename: Shoichi
authors.initials: S
authors.lastname: Ono
authors.forename: Kenji
authors.initials: K
authors.lastname: Omote
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Kasama
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Ishikawa
authors.forename: Takashi
authors.initials: T
authors.lastname: Komuro
authors.forename: Hiromi
authors.initials: H
authors.lastname: Tobita
mesh_terms: D000965:Antimony / Q000737:chemistry; D018360:Crystallography, X-Ray; D037741:Fullerenes / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation
chemical_list: D037741:Fullerenes; D008094:Lithium; D000965:Antimony