Inorganic Fluorides - Fullerenes Compounds

Fluoride based electrode materials for advanced energy storage devices

“…As discussed above C 60 fullerenes have been shown to be quite reactive with metal fluoride gasses. In particular, C 60 (MoF 6 ) 9 and C 60 (IrF 6 ) 19 have been isolated [116]. In general, it has been found that although Lewis acidity is important, the fact remains that the intercalation of the metal fluoride species will not occur unless the oxidation power is strong enough to oxidize the carbon host.…”

Modifying the electronic properties of multi-wall carbon nanotubes via charge transfer, by chemical doping with some inorganic fluorides

“…We have therefore studied, within the framework of an exploratory approach, the reactivity of MWNTs in regard to a specific category of fluorinated Lewis acids. Indeed, such oxidizing agents, well-known to yield charge transfer intercalation compounds with other allotropic forms of carbon like graphite [8][9][10][11][12] or fullerenes [13][14][15][16], stand as ideal candidates liable to give birth to a strong interaction with the carbon matrix, while respecting its structural integrity by avoiding the formation of covalent bonds, associated with electron-trapping. The strategic choice of such a reaction scheme happens to be all the more appropriate that the global morphology of a MWNT suits well the geometrical criterion inherent to intercalation chemistry, since beside the presence of a vacant central cylindrical cavity, the bonding anisotropy along the transversal and longitudinal axes of such a tube generates a van der Waals gap between the concentric carbon layers.…”

Hole-Doping of Fullerenes and Nanotubes by Way of Intercalation Chemistry

“…Partial fluorination of carbon was also mentioned, which could also account for reduction of part of the metal fluoride. The same team further extended the study using various tetra to hexavalent fluorides of different transition metals 91,92 , and concluded in similar reaction patterns, though the results suffered from ill-defined stoichiometries and from the absence of advanced structural characterization, in spite of the sometimes good apparent crystalline quality of the intercalation compounds thus prepared. Specific problems encountered in the search of a more efficiently controlled synthesis mode were outlined 93 and plausibly involve a moderate stability of the doped phases in such harsh conditions.…”