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Reaction of DPPH with Benzene Sulphonic Acid Monohydrate [PDF]
Nature Physical Science, 1972 We have previously reported1,2 that 1,1-diphenyl-2-picryl-hydrazyl (DPPH) reacts with adsorbed water on many hydroxy-lated semiconducting surfaces and undergoes an intermolecular oxidation and reduction process.
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Preparation and characterization of novel DPPH-based diradicals
Tetrahedron Letters, 1998Abstract A series of 1,1′-(2,4-di-X-benzene-1,3-diyl)bis[1-(4-Y-phenyl)-2-picrylhydrazine]s were prepared and oxidized to generate the corresponding bis- DPPH diradicals. No triplet species was observed for the compounds with X = H in the ESR measurement.
Takeaki Kamatani +7 more
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Use and Abuse of the DPPH(•) Radical.
Journal of Agricultural and Food Chemistry, 2015The 2,2-diphenyl-1-picrylhydrazyl (DPPH(•)) radical is approaching 100 years from its discovery in 1922 by Goldschmidt and Renn. This radical is colored and remarkably stable, two properties that have made it one of the most popular radicals in a wide ...
M. Foti
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Kinetika reakcija kvercetina i DPPH radikala
2022Kvercetin spada u podskupinu flavonola te mu se pripisuje niz bioloških učinaka: antioksidativni, antikarcinogeni, antialergijski, protuupalni i drugi. Reakcije flavonoida i DPPH• uobičajeno se prate tako što se mjeri smanjenje apsorbancije na valnoj duljini koja odgovara maksimumu DPPH•.
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Low temperature magnetic properties of solid DPPH
Physica B+C, 1977Abstract Magnetic susceptibility measurements are performed on DPPH-benzene complex and solvent-free DPPH in a temperature range of 300-2.2 K and in a field range of 6–20 kOe. The experimental values are quite different in these two cases and a pair model with a singlet-triplet state is proposed.
L. Van Gerven +3 more
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The spin-spin relaxation of DPPH in parallel fields
Physica, 1960Abstract A method is described for measuring both components of the complex susceptibility, χ = χ' - j χ″ by means of a twin T bridge circuit. The results of some measurements in parallel static fields for a DPPH sample are given. The relaxation time τ is found to depend on the external static field.
G.W.J. Drewes +2 more
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Preparation and Exchange Interaction of DPPH-Derived Polyradicals
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1999Abstract A series of 1,1′-(benzene-1,3-diyl)bis(1-phenyl-2-picrylhydrazine) derivatives was prepared and oxidized to generate the corresponding bis-DPPH diradicals. No triplet species was observed for the parent compound in the ESR. Incorporation of substituents in both the central benzene ring and the N-phenyl groups resulted in the detection of ...
Keiji Okada +4 more
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European Food Research and Technology, 2002
The antiradical activity of crude extracts (80% methanol, 20% water) of S. officinalis, S. glutinosa, S. sclarea and S. aethiopis was determined using the 2,2-diphenyl-1-picrylhydrazyl (DPPH·) radical scavenging method. For validation of this method several well known antioxidants (ascorbic acid-6-palmitate, gallic, chlorogenic, ferulic, caffeic, uric,
Michael Murkovic +4 more
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The antiradical activity of crude extracts (80% methanol, 20% water) of S. officinalis, S. glutinosa, S. sclarea and S. aethiopis was determined using the 2,2-diphenyl-1-picrylhydrazyl (DPPH·) radical scavenging method. For validation of this method several well known antioxidants (ascorbic acid-6-palmitate, gallic, chlorogenic, ferulic, caffeic, uric,
Michael Murkovic +4 more
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