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Int. J. Mol. Sci. 2006, 7(5), 130-143; doi:10.3390/i7050130
Article

Reaction of 2,2-Diphenyl-1-picrylhydrazyl with HO•, O2•, HO ,and HOO Radicals and Anions

1,* , 2, 3, 4, 1 and 5,*
1 Institute of Physical Chemistry “Ilie Murgulescu” of the Romanian Academy, Splaiul Independentei 202, 060021 Bucharest, Romania 2 Institute of Organic Chemistry “C. D. Nenitzescu” of the Romanian Academy, Splaiul Independentei 202B, Bucharest 15-256, Romania 3 National Agency for Medicinal Drugs, Aviator Sanatescu Street 48, Bucharest, Romania 4 University of Bucharest, Department of Physical Chemistry, Bulevardul Elisabeta 4-12, Bucharest, Romania 5 Texas A&M University, 5007 Avenue U, Galveston, TX 77551, USA
* Authors to whom correspondence should be addressed.
Received: 24 March 2006 / Accepted: 15 May 2006 / Published: 15 May 2006
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Abstract

Using electronic absorption spectra and thin layer chromatography, the reactionof 2,2-diphenyl-1-picrylhydrazyl (DPPH) with O2•, HO•, HO, and HOO anions and freeradicals revealed the formation of the para-nitro- and para-hydroxy-derivatives of 2,2-diphenyl-1-picrylhydrazine (DPPH-H) 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-6 ether) ispseudo-first-order during the first 25 minutes.
Keywords: Diphenylpicrylhydrazyl; Reactions with potassium superoxide; hydrogen peroxide; hydroxy free radical. Diphenylpicrylhydrazyl; Reactions with potassium superoxide; hydrogen peroxide; hydroxy free radical.
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Hristeac, E.N.; Caproiu, M.T.; Pencu, G.; Hillebrand, M.; Constantinescu, T.; Balaban, A.T. Reaction of 2,2-Diphenyl-1-picrylhydrazyl with HO•, O2•, HO ,and HOO Radicals and Anions. Int. J. Mol. Sci. 2006, 7, 130-143.

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Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert