Accession Number:

AD0414491

Title:

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

Descriptive Note:

Corporate Author:

NATIONAL CARBON CO INC CLEVELAND OH

Personal Author(s):

Report Date:

1963-06-01

Pagination or Media Count:

35.0

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.

Subject Categories:

  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE