Radical formation during phenol oxidation in aqueous media

✍ Scribed by A. N. Shendrik; I. D. Odaryuk; L. V. Kanibolotska; E. A. Kalinichenko; A. S. Tsyapalo; V. V. Beznos; A. L. Kanibolotsky

• Book ID: 102450067
• Publisher: John Wiley and Sons
• Year: 2012
• Tongue: English
• Weight: 350 KB
• Volume: 44
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.20592

✦ Synopsis

Kinetics of oxygen consumption, reaction product formation, and chemiluminescence during polyphenol oxidation by molecular oxygen in alkaline aqueous media with additions of L-ascorbic acid (AscH 2 ) and homocysteine (HCys) has been investigated. In these processes, AscH 2 and HCys have been shown to act as typical radical-reaction inhibitors that can be used for determinations of the radical formation rates. The rates of radical formation during oxidation of hydroquinone ( p-QH 2 ), chlorohydroquinone (Cl-QH 2 ), 2,5-dichlorohydroquinone (2,5Cl-QH 2 ), catechol (PK), 4-methylcatechol (4CH 3 -PK), pyrogallol (PG), gallic acid (GK) have been estimated.