Autori: Elena N. Hristea, Mihaela Hillebrand, Miron T. Cãproiu, Gabriela Pencu,
Editorial: International Journal of Molecular Science, 7, p.130-143, 2006.
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