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Graphite epoxide.

Jayanta Chattopadhyay1, Arnab Mukherjee, Christopher E Hamilton

  • 1Department of Chemistry and Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 Main Street, Houston, Texas 77005, USA.

Journal of the American Chemical Society
|April 2, 2008
PubMed
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Graphite epoxide is synthesized using meta-chloroperoxybenzoic acid. Scanning tunneling microscopy reveals functionalization occurs at graphite edges, not the basal plane, with quantification possible via deepoxidation.

Area of Science:

  • Materials Science
  • Organic Chemistry
  • Surface Science

Background:

  • Graphite's unique properties stem from its layered structure.
  • Functionalization of graphite is key to developing novel carbon-based materials.
  • Controlling functionalization sites is crucial for tailored material properties.

Purpose of the Study:

  • To investigate the selective oxidation of graphite.
  • To characterize the location of epoxide functionalization on graphite surfaces.
  • To establish a method for quantifying epoxide content in functionalized graphite.

Main Methods:

  • Graphite oxidation using meta-chloroperoxybenzoic acid.
  • Surface characterization via Scanning Tunneling Microscopy (STM).
  • Epoxide quantification through a deepoxidation reaction with Methylrhenium trioxide (MeReO3) and triphenylphosphine (PPh3).

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Main Results:

  • Successful synthesis of graphite epoxide.
  • STM imaging demonstrated that functionalization predominantly occurs at the edges of graphite sheets.
  • The deepoxidation reaction with MeReO3/PPh3 enabled quantification of the epoxide groups.

Conclusions:

  • Meta-chloroperoxybenzoic acid is an effective reagent for graphite oxidation.
  • Graphite edge sites are preferentially functionalized, offering potential for anisotropic material design.
  • A reliable method for quantifying epoxide content has been developed, aiding further research in functionalized graphite.