Methylaminated potassium fulleride, (CH3NH2)K 3C60: Towards hyperexpanded fulleride lattices

Alexey Yu. Ganin, Yasuhiro Takabayashi, Craig A. Bridges, Yaroslav Z. Khimyak, Serena Margadonna, Kosmas Prassides, Matthew J. Rosseinsky

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Co-intercalation of methylamine molecules into the cubic K3C60 lattice affords the fulleride (CH3NH2)K3C60, which was characterized by Raman and MAS 13C and 1H NMR spectroscopy. The high-resolution synchrotron X-ray powder diffraction technique was employed to determine its crystal structure at ambient temperature. We find that CH3NH2 bonds to K+ ions residing in the pseudo-octahedral interstices, thereby providing an efficient and facile route to hyperexpanded close-packed strongly anisotropic fulleride lattices, while retaining the electronic contact between the C603- anions. Preliminary evidence for the occurrence of a transition to an antiferromagnetic state at low temperature is also presented, consistent with the proximity of the present system to the metal-insulator boundary of the electronic phase diagram of C603- fullerides.

Original languageEnglish
Pages (from-to)14784-14785
Number of pages2
JournalJournal of the American Chemical Society
Issue number46
Early online date31 Oct 2006
Publication statusPublished - 1 Nov 2006
Externally publishedYes

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