Effective inhibition of hydroxyl radicals by hydroxylated biphenyl compounds.
In aqueous media, approximate rate constants for the reactions between hydroxyl radicals (.OH) and biphenyl compounds such as dehydrodieugenol, magnolol, honokiol, dehydrodidihydroeugenol, dehydrodivanillyl alcohol, and dehydrodicreosol were estimated by competition reactions for .OH between these biphenyls and 5,5-dimethyl-1-pyrroline-N-oxide (DMPO). By measuring the decrease in the height of the EPR signals of the .OH spin adduct, rate constants in the order of 10(9) to 10(10) M were measured.
Taira
J
J
Cosmetics Laboratory, Kanebo Ltd., Kanagawa, Japan.
Ikemoto
T
T
Mimura
K
K
Hagi
A
A
Murakami
A
A
Makino
K
K
D001713:Biphenyl Compounds / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D006878:Hydroxides / Q000737:chemistry*; D013113:Spin Labels
D001713:Biphenyl Compounds; D005609:Free Radicals; D006878:Hydroxides; D013113:Spin Labels