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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 39,
  • Issue 1,
  • pp. 143-153
  • (1985)

The Structure of Hexane Soot I: Spectroscopic Studies

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Abstract

Soot produced from the combustion of fossil fuels, widely distributed in the atmosphere, is significantly different from most carbons for which the surface structure and/or reactivity have been studied. The composition and surface structure of soot derived from the combustion of <i>n</i>-hexane have been examined by FT-IR, Raman, <sup>13</sup>C CP/MAS NMR, and EPR spectroscopies as well as through desorption measurements. Carbon-oxygen functionalities on the fresh carbon surface include acid anhydride, a carbonyl conjugated with an aromatic segment, an alkylketone, and aryl ether linkages. Also present, confirmed by isotopic substitution, is a quantity of unsaturated C-H, dependent upon the combustion conditions. The degree of aromaticity and the graphitic nature of this soot have been determined.

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