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The reaction of carbon black surface with 2,2-diphenyl-1-picrylhydrazyl

✍ Scribed by Kumakazu Ohkita; Norio Tubokawa

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
543 KB
Volume
10
Category
Article
ISSN
0008-6223

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✦ Synopsis

The reaction of carbon black surface with 2,2-diphenyl-1-picrylhydrazyl (DPPH) in carbon tetrachloride has been studied. It was found that DPPH abstracts hydrogen atoms from the surface of the carbon black and gives the corresponding hydrazine (DPPH2), while hydrazyl radicals were found not to bind chemically to the surface of carbon black. The amounts of DPPH reacted with carbon blacks were determined. It was found that furnace blacks modified by oxidation with agents such as hydrogen peroxide are more reactive towards DPPH than the untreated carbons. It appears to be fairly conclusive that the reaction of DPPH with carbon black can be used for determination of the number of hydroquinone groups present on the surface of carbon blacks.

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