Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Chemical compound
Carbon monofluoride (CF, CFx, or (CF)n), also called polycarbon monofluoride (PMF), polycarbon fluoride, poly(carbon monofluoride), and graphite fluoride, is a material formed by high-temperature reaction of fluorine gas with graphite, charcoal, or pyrolytic carbon powder.[1] It is a highly hydrophobic microcrystalline powder. Its CAS number is 51311-17-2. In contrast to graphite intercalation compounds it is a covalent graphite compound.
Carbon is stable in a fluorine atmosphere up to about 400 °C, but between 420-600 °C a reaction takes place to give substoichiometric carbon monofluoride, CF0.68 appearing dark grey. With increasing temperature and fluorine pressure stoichiometries up to CF1.12 are formed. With increasing fluorine content the colour changes from dark grey to cream white indicating the loss of the aromatic character. The fluorine atoms are located in an alternating fashion above and under the former graphene plane, which is now buckled due to formation of covalent carbon-fluorine bonds. Reaction of carbon with fluorine at even higher temperature successively destroys the graphite compound to yield a mixture of gaseous fluorocarbons such as tetrafluoromethane, CF4, and tetrafluoroethylene, C2F4.[2]
In a similar fashion the recently found carbon allotrope fullerene, C60 reacts with fluorine gas to give fullerene fluorides with stoichiometries up to C60F48.[3]
A precursor of carbon monofluoride is the fluorine-graphite intercalation compound, also called fluorine-GIC.
Other intercalation fluorides of carbon are:
poly(dicarbon fluoride) ((C2F)n);
tetracarbon monofluoride (TCMF, C4F).
Graphite fluoride is a precursor for preparation of graphene fluoride by a liquid phase exfoliation.[4]
^Ernst-Christian Koch (3 April 2012). Metal-Fluorocarbon Based Energetic Materials. John Wiley & Sons. pp. 25–27. ISBN 978-3-527-32920-5. Retrieved 16 September 2012.
^BBC – h2g2 – Carbon and its Inorganic Compounds
^Troyanov, Sergei I.; Troshin, Pavel A.; Boltalina, Olga V.; Ioffe, Ilya N.; Sidorov, Lev N.; Kemnitz, Erhard (2001). "Two Isomers of C60F48: An Indented Fullerene". Angewandte Chemie International Edition. 40 (12): 2285–2287. doi:10.1002/1521-3773(20010618)40:12<2285::AID-ANIE2285>3.0.CO;2-Y. PMID 29711847.
^Radek Zboril; Frantisek Karlicky; A.B. Bourlinos; T.A. Steriotis; A.K. Stubos; V. Georgakilas; K. Safarova; D. Jancik; C. Trapalis; Michal Otyepka (2010). "Graphene Fluoride: A Stable Stoichiometric Graphene Derivative and its Chemical Conversion to Graphene". Small. 6 (24): 2885–2891. doi:10.1002/smll.201001401. PMC 3020323. PMID 21104801.
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