Title: Quinone--Hydroquinone π-Conjugated Redox Reaction Involving Proton-coupled Electron Transfer Plays an Important Role in Scavenging Superoxide by Polyphenolic Antioxidants.
Authors: Nakayama, Tatsushi; Uno, Bunji
Abstract: The proton-coupled electron transfer (PCET) from p-, o-, and m-dihydroxybenzenes (PQH2, OQH2, and MQH2, respectively) to the hydroperoxy radical (HO2•) derived from superoxide (O2•-) is investigated. It is demonstrated that quinone-hydroquinone p-conjugated redox systems characterized by electron transfer in PQH2 and OQH2 moieties play an important role in scavenging O2•- by polyphenolic antioxidants.
Subjects: QUINONE; HYDROQUINONE; OXIDATION-reduction reaction; CHARGE exchange; SUPEROXIDES; POLYPHENOLS
Publication: Chemistry Letters, 2010, Vol 39, Issue 3, p4
ISSN: 0366-7022
Publication type: Academic Journal
DOI: 10.1246/cl.2010.162

Quinone--Hydroquinone π-Conjugated Redox Reaction Involving Proton-coupled Electron Transfer Plays an Important Role in Scavenging Superoxide by Polyphenolic Antioxidants.

Nakayama, Tatsushi; Uno, Bunji