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.
@article{arxiv.cond-mat/0509510,
title = {Unusual polymerization in the Li4C60 fulleride},
author = {M. Ricco and T. Shiroka and M. Belli and D. Pontiroli and M. Pagliari and G. Ruani and D. Palles and S. Margadonna and M. Tomaselli},
journal= {arXiv preprint arXiv:cond-mat/0509510},
year = {2007}
}
Comments
7 pages, 6 figures, RevTex4, submitted to Phys. Rev. B