RESEARCH AND DEVELOPMENT ON ADVANCED GRAPHITE MATERIALS. VOLUME XVI. AN ELECTRON SPIN RESONANCE STUDY OF THERMAL DECOMPOSITION REACTIONS OF ORGANIC COMPOUNDS

Abstract

Initial results of an ESR (electron spin resonance) survey of the thermal decomposition and carbonization of pure organic compounds are presented. ESR measurements were performed during pyrolysis in inert polyphenyl solvents to permit observation of resolved hyperfine structure of radical intermediates. The generality of radical formation during carbonization is demonstrated. Detailed investigations were made on the model aromatic hydrocarbons, acenaphthylene, 9,9'-bifluorenyl and 9,9'-bifluorylidene which provide examples of extremes in graphitization behavior. Results are discussed in terms of reaction mechanisms and the nature of radicals in low temperature carbons. Resolved spectra for acenaphthylene and two deuterated analogs are compared. ESR studies are reported for thermal decomposition of several aromatic diazocompounds. The observed stable radical intermediates are believed to result from further reaction of the initially generated carbene species.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1963
Accession Number
AD0414491

Entities

People

  • I. C. Lewis
  • L. S. Singer

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Aromatic Hydrocarbons
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Cyclic Hydrocarbons
  • Electron Spin Resonance
  • Electrons
  • Graphitic Materials
  • Line Spectra
  • Materials
  • Materials Laboratories
  • Organic Chemistry
  • Organic Compounds
  • Resonance
  • Spectra
  • Spectral Lines
  • Spin Resonance

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Reinforced Composite Materials

Technology Areas

  • Microelectronics