期刊
INORGANIC CHEMISTRY
卷 51, 期 9, 页码 5270-5273出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic300186y
关键词
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资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [20108001, 20245006, 20036008, 20038007, 22000009]
- Strategic Japanese-Spanish Cooperative Program
- JST
- MICINN
- Grants-in-Aid for Scientific Research [20108002, 24550145] Funding Source: KAKEN
Metal positions in endohedral metallofullerenes (EMFs) are of special importance because their molecular symmetry and intrinsic properties are strongly influenced by the location and motion of the encapsulated metals. X-ray analyses of the cocrystals of Gd@C-2v(9)-C-82 with nickel(II) octaethylporphyrin [Ni-II(OEP)] reveal that the Gd3+ cation is off-center, being located under a hexagonal ring along the 2-fold axis of the C-2v(9)-C-82 cage. This result is in sharp contrast to that of a previous study, showing that Gd@C-2v(9)-C-82 has an anomalous endohedral structure, with the metal being positioned over a [6,6] bond, which is opposite to the hexagonal ring along the C-2 axis (Phys. Rev. B 2004, 69, 113412). In agreement with theoretical calculations and related studies, it is conclusive that the single rare-earth metal in M@C-2v(9)-C-82 always tends to coordinate with the hexagonal ring along the 2-fold axis, instead of interacting with the [6,6] bond on the other end, regardless of the type of metal atom.
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