Pulse radiolysis study of vitamin K1 reduction in ethanolic solution.
A pulse radiolysis study of vitamin K1 reduction was carried out in argon-saturated ethanolic solutions. The alpha-hydroxyethyl radicals CH3C.HOH (R.) and the solvated electrons (e-solv) reduce vitamin K1, leading to the semiquinone transient K1H.. This species, characterized by its absorption spectrum, decays by disproportionation and leads to the formation of the hydroquinone K1H2. The rate constants of the monoelectronic exchanges involved in this reduction have been determined.
Fackir
L
L
Laboratoire de Chimie Physique, URA 400 CNRS, Paris, France.
Jore
D
D
Gardès-Albert
M
M
Acher
F
F
Azerad
R
R
Hickel
B
B
D001128:Argon; D000431:Ethanol; D005609:Free Radicals; D007700:Kinetics; D008433:Mathematics; D011675:Pulse Radiolysis; D012996:Solutions; D013053:Spectrophotometry; D013997:Time Factors; D010837:Vitamin K 1 / Q000737:chemistry / Q000528:radiation effects*
D005609:Free Radicals; D012996:Solutions; D000431:Ethanol; D001128:Argon; D010837:Vitamin K 1