Unusual polymerization in the Li4C60 fulleride

Details Unusual polymerization in the Li4C60 fulleride Unusual polymerization in the Li4C60 fulleride

2005-09-20

arxiv.org/abs/cond-mat/0509510v1

Physical Review B 72, 155437 (2005)

Physics

Condensed Matter

Materials Science

7 pages, 6 figures, RevTex4, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.72.155437

Li4C60, one of the best representatives of lithium intercalated fullerides, features a novel type of 2D polymerization. Extensive investigations, including laboratory x-ray and synchrotron radiation diffraction, 13C NMR, MAS and Raman spectroscopy, show a monoclinic I2/m structure, characterized by chains of [2+2]-cycloaddicted fullerenes, sideways connected by single C-C bonds. This leads to the formation of polymeric layers, whose insulating nature, deduced from the NMR and Raman spectra, denotes the complete localization of the electrons involved in the covalent bonds.

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