Fluorine-graphite compounds

Ohana, I., I. Palchan, Y. Yacoby, and D. Davidov. 1988. Electronic charge transfer in stage-2 fluorine-intercalated graphite compounds. Phys. Rev. B 38 12627-12632. 

Vaknin, D., I. Palchan, D. Davidov, H. Selig, and D. Moses. 1986. Resistivity and E.S.R. studies of graphite HOPG/fluorine intercalation compounds. Synth. Metals 16 349-365. 

Discharge characteristics of fluorine-graphite intercalation compounds... 

Fig. 6. Galvanostatic discharge curves of button-type cells Li/1 M L1CIO4 + EC PC DME/LT—CFV, HT—CF, at 40 mAg 1. LT—CFV fluorine-graphite intercalation compound prepared at a low temperature, HT—CFV graphite fluoride prepared at a high temperature (reproduced with permission from J. Power Sources, 68 (1994) 708 [34]).

N. Watanabe, H. Touhara, T. Nakajima, T. Mallouk, H. Selig and N. Bartlett, Foreword and Chap. 8, Fluorine Intercalation Compounds of Graphite, Inorganic Solid Fluorides, Chemistry and Physics, ed. P. Hagenmuller, Academic Press, pp. xiii-xiv and Sec. II, Chap. 8 (1985) 331. 

Limits of detection for an ETV source are in the picogram to nanogram range and are often better than for direct solution introduction via a nebulizer. As with direct-insertion methods (DSl, see below), graphite supports for solid samples often lead to carbide formation with elements that resist volatilization. In these cases, a thermal reagent is commonly added to convert the sample elements into a more volatile form. For example, chlorine- or fluorine-containing compounds, such... 

Covalent C—F bonds are also detectable in lamellar n charge-transfer graphite compounds such as CjSbFj C KrFj and halogen fluorides (see 16.4.2.1.1 and reviews ). These mixed covalent-rr charge-transfer compounds arise from internal fluorination by the intercalant. 

A modified form of the Avrami-Erofeev equation, ln[—ln(l — a)] = nln(fe/n) - - nlnr, where is a nondimen-sional coefficient and A is a generalized rate constant, has been applied by Pinakov and Logvinenko to describe the decomposition of fluorinated graphite inclusion compounds of 1,2-dichloroethane and clathrates of manganese formates with dioxane. 

Group 14. - 3.14.1 Carbon. The bonding structure in amorphous carbon nitride has been studied by H, and NMR spectroscopy. A F NMR study of paramagnetism in fluorinated graphite has been reported. Carbon-fluorine bonding has been detected in fluorine-graphite intercalation compounds by and F NMR spectroscopy. ... 

Haveg 46 is a phenol-formaldehyde resin with a graphite filler. Its primary consideration is for use with hydrofluoric acid, fluoslllcic acid, and related fluorine-bearing compounds. 

The current, critical evaluation of the ideal gas thermodynamic data on the f1uoromethanes (8) and f1uoroethanes 9) will be particularly appropriate to the reduction of C-H bond dissociation energy data. Additional data on the enthalpy of formation of fluorine containing compounds will be recalculated (if necessary) to reflect the recent, direct determination of AH2(HF-nH20, 298) of Johnson, Smith and Hubbard (10). The data for the reference states, C(graphite), H2(g) and p2(g) are the same as those used by Rodgers et al. (8). 

Touhara, H. Okino, F. Suganuma, S., "Synthesis, Properties, and Functions of Graphite-Fluorine Intercalation Compounds," Kino Zairyo 1991,11,18. 

Touhara, H. Suganuma, S. Okino, F., "Lithium Batteries with Fluorine-Graphite Intercalation Compound Cathodes. Post-Graphite Fluoride Cathode," Tanso 1991,150, 328. 

Nakajima, T., "Fluorine-Graphite Intercalation Compounds. Their Synthesis, Structures, and Physical and Chemical Properties," Tanso, 1990,145,295. 

Watanabe, N. Touhara, H. Nakajima, T. Bartlett, N. Malloxik, T. Selig, H., "Fluorine Intercalation Compounds of Graphite," In Inorganic Solid Fluorides Chemistry and Physics, Hagenmuller, P., Ed. Academic Orlando, FL, 1985 p 331. 

TABLE 12.3 Fluorine/carbon atomic ratio, stage number and repeat distance 4 of fluorine-graphite intercalation compounds synthesized by various methods [189-192]... 

Figure 1 Fully optimized structures of the partially fluorinated graphite intercalation compounds with optimized Hj molecules (Adapted with permission from Ref 27. Copyright (2009) American Chemical Society.)...

Graphite reacts with alkali metals, for example potassium, to form compounds which are non-stoichiometric but which all have limiting compositions (for example K C) in these, the alkaU metal atoms are intercalated between the layers of carbon atoms. In the preparation of fluorine by electrolysis of a molten fluoride with graphite electrodes the solid compound (CF) polycarbon fluoride is formed, with fluorine on each carbon atom, causing puckering of the rings. 

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