unsaturated alcohols (3 and 4). The effects of olefin concentration on the quantum yield of product formation, as well as quenching studies, suggest that 3 and 4 are formed from the excited singlet state of methyl pyruvate, while 1 and 2 are produced from the triplet state of methyl pyruvate. The role of exciplexes in this reaction is discussed. Quenching data of fluorescence of methyl pyruvate and the
在
2,3-二甲基-2-丁烯存在下对
丙酮酸甲酯进行紫外线照射,以合理的量子产率形成四种主要的光产物:两种不饱和醚(1 和 2)和两种不饱和醇(3 和 4) . 烯烃浓度对产物形成量子产率的影响以及淬灭研究表明,3 和 4 是由
丙酮酸甲酯的激发单线态形成的,而 1 和 2 是由
丙酮酸甲酯的三线态产生的。讨论了激基复合物在该反应中的作用。
丙酮酸甲酯的荧光猝灭数据和该反应的动力学分析支持这些考虑。