目前已大量地报道了可见光诱导的电子给体还原醌的机理研究。提出通过两条途径得到醌的两电子还原产物QH~-。其一是在给体-受体复合物内直接进行两电子转移(电子-质子-电子转移),或由给体-受体单电子转移形成的半醌自由基QH经歧化生成两电子还原产物QH~-.竹红菌甲素和乙素(分别简称为HA和HB见图1,图2)都是芘醌衍生物。最近我们报道了光诱导单电子还原产物HA~-(HB~-)和净的两电子还原产物HAH~-(HBH~-)的ESR At present, a large number of studies have been reported on the mechanism of visible-light-induced electron donor reduction of quinones. The two-electron-reduction product of quinone, QH ~ -, was proposed in two ways. One is the direct two-electron transfer (electron-proton-electron transfer) within the donor-acceptor complex, or the formation of two electron reduction products of the semiquinone free radical QH formed by the donor-acceptor one-electron transfer QH ~ -. Hypocrellin A and B (respectively referred to as HA and HB in Figure 1, Figure 2) are all pyrene quinone derivatives. Recently, we report the ESR of HA ~ - (HB ~ -), a light-induced single electron reduction product, and the net two-electron reduction product HAH ~ -