Perfectly ordered two-dimensional layer structures found in some endohedral metallofullerenes

Sachiko Maki, Eiji Nishibori, Yutaka Kitamura, Ryo Kitaura, Masayuki Ishihara, Takayuki Aono, Shinobu Aoyagi, Masaki Takata, Makoto Sakata, Hisanori Shinohara

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A two-dimensional (2D) arrangement of metallofullerenes for both M@C 82 (isomer I) (M = Y, La, Ce, Pr) and (M2C y)@C82 (isomer III) (M = Er, y = 0, 2; M = Sc, y = 2) is crystallized with a 1:2 fullerene/toluene molecular ratio. The determined crystal is a 2D layered structure, which is composed of metallofullerene layers sandwiched by the toluene layers. Although the M@C82(I) arrangement in a 1:1 crystal is almost identical to that of (M2C y)@C82(III), the M@C82(I) arrangement in a 1:2 crystal is different from (M2Cy)@C82(III). It is found that the difference of the molecular arrangement strongly correlates with an orientation of metallofullerenes in a 2D layer. Our findings suggest the existence of a subtle but important interaction between the confined atoms/molecules and the solvent molecules/toluene through the carbon cage, which leads to a guiding principle of crystallization control with a solvent ingredient for metallofullerenes.

Original languageEnglish
Pages (from-to)3632-3636
Number of pages5
JournalCrystal Growth and Design
Issue number8
Publication statusPublished - 2013 Aug 7


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