On the so-called "semi-ionic" C-F bond character in fluorine-GIC

Yuta Sato, Keiji Itoh, Rika Hagiwara, Toshiharu Fukunaga, Yasuhiko Ito

Research output: Contribution to journalArticle

119 Citations (Scopus)

Abstract

The short-range structures of fluorine-graphite intercalation compounds with stage-1 structures, CXF (x = 2.47,2.84, 3.61), were analyzed by means of neutron diffraction. It has been shown that the so-called "semi-ionic" C-F bond character in CxF is essentially covalent with the bond length of 0.140nm, and the original planar graphene sheets are buckled at the sp3-hybridized carbon atoms bound to fluorine atoms. Conjugated C-C double bonds with the bond length of 0.142 nm are preserved between the carbon atoms unbound to fluorine atoms in CXF, while other C-C bonds are single bonds with the bond lengths of 0.153 nm. The C-F bond order in CXF is slightly lower than those in poly(carbon monofluoride) ((CF)n) and poly(dicarbon monofluoride) ((C 2F)n), which is explained by the hyperconjugation involving the C-C bonds on the carbon sheets and C-F bond.

Original languageEnglish
Pages (from-to)3243-3249
Number of pages7
JournalCarbon
Volume42
Issue number15
DOIs
Publication statusPublished - 2004
Externally publishedYes

Fingerprint

Fluorine
Bond length
Carbon
Atoms
Intercalation compounds
Graphite
Neutron diffraction
Graphene

Keywords

  • A. Graphite, intercalation compounds
  • B. Intercalation
  • C. Neutron scattering
  • D. Crystal structure

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

On the so-called "semi-ionic" C-F bond character in fluorine-GIC. / Sato, Yuta; Itoh, Keiji; Hagiwara, Rika; Fukunaga, Toshiharu; Ito, Yasuhiko.

In: Carbon, Vol. 42, No. 15, 2004, p. 3243-3249.

Research output: Contribution to journalArticle

Sato, Y, Itoh, K, Hagiwara, R, Fukunaga, T & Ito, Y 2004, 'On the so-called "semi-ionic" C-F bond character in fluorine-GIC', Carbon, vol. 42, no. 15, pp. 3243-3249. https://doi.org/10.1016/j.carbon.2004.08.012
Sato, Yuta ; Itoh, Keiji ; Hagiwara, Rika ; Fukunaga, Toshiharu ; Ito, Yasuhiko. / On the so-called "semi-ionic" C-F bond character in fluorine-GIC. In: Carbon. 2004 ; Vol. 42, No. 15. pp. 3243-3249.
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AU - Ito, Yasuhiko

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N2 - The short-range structures of fluorine-graphite intercalation compounds with stage-1 structures, CXF (x = 2.47,2.84, 3.61), were analyzed by means of neutron diffraction. It has been shown that the so-called "semi-ionic" C-F bond character in CxF is essentially covalent with the bond length of 0.140nm, and the original planar graphene sheets are buckled at the sp3-hybridized carbon atoms bound to fluorine atoms. Conjugated C-C double bonds with the bond length of 0.142 nm are preserved between the carbon atoms unbound to fluorine atoms in CXF, while other C-C bonds are single bonds with the bond lengths of 0.153 nm. The C-F bond order in CXF is slightly lower than those in poly(carbon monofluoride) ((CF)n) and poly(dicarbon monofluoride) ((C 2F)n), which is explained by the hyperconjugation involving the C-C bonds on the carbon sheets and C-F bond.

AB - The short-range structures of fluorine-graphite intercalation compounds with stage-1 structures, CXF (x = 2.47,2.84, 3.61), were analyzed by means of neutron diffraction. It has been shown that the so-called "semi-ionic" C-F bond character in CxF is essentially covalent with the bond length of 0.140nm, and the original planar graphene sheets are buckled at the sp3-hybridized carbon atoms bound to fluorine atoms. Conjugated C-C double bonds with the bond length of 0.142 nm are preserved between the carbon atoms unbound to fluorine atoms in CXF, while other C-C bonds are single bonds with the bond lengths of 0.153 nm. The C-F bond order in CXF is slightly lower than those in poly(carbon monofluoride) ((CF)n) and poly(dicarbon monofluoride) ((C 2F)n), which is explained by the hyperconjugation involving the C-C bonds on the carbon sheets and C-F bond.

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