Stopped-flow-optical absorption and -electron spin resonance studies on short-lived quercetin semiquinone radical produced by redox reactions with O2−• radical in DMSO

The stopped-flow-optical absorption and -ESR spectra of a quercetin (QueH2) derived semiquinone anion radical (Que−•, half-life time ~31 ms) were detected by mixing the O2−• radical and QueH2 in di...