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Reaction of 2,2-diphenyl-1-picrylhydrazyl with HO•, O2•–, HO– , and HOO– radicals and anions

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Elena N. Hristea, Mihaela Hillebrand, Miron T. Cãproiu, Gabriela Pencu,

Editorial: International Journal of Molecular Science, 7, p.130-143, 2006.

Rezumat:

Abstract. Using electronic absorption spectra and thin layer chromatography, the reaction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) with O2•–, HO•, HO– , and HOO– anions and free radicals revealed the formation of the para-nitro- and para-hydroxy-derivatives of 2,2-diphenyl-1-picrylhydrazine (DPPH2) and of DPPH fragmentation products (diphenylamine, tetraphenylhydrazine). The reaction of DPPH with the O2•– anion-radical (from KO2 in benzene solution at room temperature in the presence of 18-crown-ether-6) is pseudo-unimolecular during the first 25 minutes.

Cuvinte cheie: chimie // Chemistry