The reactions of the photoexcited aromatic ketones, xanthone and 1-azaxanthone, with polyalkylbenzene donors yields the corresponding ketyl radicals as detected by nanosecond laser flash photolysis. On the basis of formation of these photoreduced products, the quenching of the photoexcited species is expected to occur either by a one-step hydrogen abstraction from the donor, electron transfer followed
光激发的
芳香酮、
氧杂蒽酮和 1-氮杂杂
蒽酮与多烷基苯供体的反应产生相应的羰基自由基,如纳秒激光闪光光解所检测到的。在这些光还原产物的形成的基础上,光激发物种的猝灭预计将通过从供体的一步氢夺取、电子转移随后从供体转移质子,或通过形成电荷转移而发生。类型在氢原子转移之前遇到复合物。研究了三线态
氧杂蒽酮和三线态 1-氮杂杂
蒽酮与多烷基苯供体在
乙腈中的反应,以探讨三线态的性质和氧化还原性质对每个淬灭途径的相对重要性的影响。双分子速率常数的测定,