Journal
CHEMISTRY LETTERS
Volume 39, Issue 3, Pages 162-164Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2010.162
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The proton-coupled electron transfer (PCET) from p-, o-, and m-dihydroxybenzenes (PQH(2), OQH(2), and MQH(2), respectively) to the hydroperoxy radical (HO2 center dot) derived from superoxide (O-2(center dot-)) is investigated. It is demonstrated that quinone-hydroquinone pi-conjugated redox systems characterized by electron transfer in PQH(2) and OQH(2) moieties play an important role in scavenging O-2(center dot-) by polyphenolic antioxidants.
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