What is responsible for antioxidant properties of polyphenolic compounds from plants?

M Olszowy - Plant Physiology and Biochemistry, 2019 - Elsevier
Due to the negative impact of reactive species (including free radicals) on humans and
animals, the investigations to find effective substances (antioxidants), which protect living …

Structural features of small molecule antioxidants and strategic modifications to improve potential bioactivity

NC Charlton, M Mastyugin, B Török, M Török - Molecules, 2023 - mdpi.com
This review surveys the major structural features in various groups of small molecules that
are considered to be antioxidants, including natural and synthetic compounds alike. Recent …

Electron-Transfer Reaction of Cinnamic Acids and Their Methyl Esters with the DPPH Radical in Alcoholic Solutions

MC Foti, C Daquino, C Geraci - The Journal of organic chemistry, 2004 - ACS Publications
The kinetic behavior of cinnamic acids, their methyl esters, and two catechols 1− 10 (ArOH)
in the reaction with DPPH• in methanol and ethanol is not compatible with a reaction …

Antioxidant activities of flavidin in different in vitro model systems

GK Jayaprakasha, LJ Rao, KK Sakariah - Bioorganic & medicinal chemistry, 2004 - Elsevier
Flavidin was isolated from Orchidaceae species and purified by silica gel column
chromatography. The structure was identified using physical and spectral (1H, 13C NMR …

Hydrogen atom abstraction kinetics from intramolecularly hydrogen bonded ubiquinol-0 and other (poly) methoxy phenols

MI de Heer, P Mulder, HG Korth… - Journal of the …, 2000 - ACS Publications
The effect of methoxy substitution on the abstraction of the phenolic hydrogen atom involved
in intramolecular hydrogen bonding by tert-butoxyl and cumyloxyl radicals has been …

Poly methoxy phenols in solution: O− H bond dissociation enthalpies, structures, and hydrogen bonding

MI de Heer, HG Korth, P Mulder - The Journal of Organic …, 1999 - ACS Publications
The effect of methoxy substitution on the phenolic-hydrogen bond dissociation enthalpy has
been established by a photoacoustic calorimetric method and by means of density functional …

Kinetic solvent effects on phenolic antioxidants determined by spectrophotometric measurements

M Foti, G Ruberto - Journal of agricultural and food chemistry, 2001 - ACS Publications
The effects of polar (acetonitrile and tert-butyl alcohol) and apolar (cyclohexane) solvents on
the peroxyl-radical-trapping antioxidant activity of some flavonoids, catechol derivatives …

Free radical scavenging and antioxidant activity of 5, 7, 3′, 4′-hydroxy-substituted flavonoids

DI Tsimogiannis, V Oreopoulou - Innovative Food Science & Emerging …, 2004 - Elsevier
The antioxidant efficiencies of 5, 7, 3′, 4′-hydroxy-substituted flavonoids were examined.
The tested compounds (quercetin, luteolin, taxifolin,(+)-catechin and eriodictyol) were …

Solvent Effect on the Rate of β-Scission of the tert-Butoxyl Radical

YP Tsentalovich, LV Kulik, NP Gritsan… - The Journal of …, 1998 - ACS Publications
The transient absorption spectrum of the tert-butoxyl radical in the UV region was obtained
by the laser flash photolysis technique. The rate constants for β-scission and self-termination …

Revisiting the Synthesis and Nucleophilic Reactivity of an Anionic Copper Superoxide Complex

WD Bailey, NL Gagnon, CE Elwell… - Inorganic …, 2019 - ACS Publications
The addition of 1 equiv of KO2 and Kryptofix222 (Krypt) in CH3CN to a solution of LCu
(CH3CN)[L= N, N′-bis (2, 6-diisopropylphenyl)-2, 6-pyridinecarboxamide] in …