Abstract : Dimethyldioxetanone (2a) undergoes two distinct thermal reactions which generate electronically excited states. The unimolecular decomposition of 2a at 30.0 C produces excited singlet and triplet acetone, with efficiencies of 0.1 and 1.5% respectively. The composite activation energy for formation of singlet acetone is 3-4 kcal/mol greater than the activation energy for the thermal disappearance of 2a. This result is interpreted in terms of two parallel competitive pathways for dioxetanone decomposition, the more highly activated one of which leads to excited acetone. The addition of easily oxidized aromatic hydrocarbons or amines catalyzes the chemiluminescence of 2a. The magnitude of the catalytic rate constant, and the efficiency of light production are correlated with the one electron oxidation potential of the hydrocarbon. Under these conditions the chemiluminescence results from a chemically initiated electron-exchange luminescence (CIEEL) path. (Author)

中文翻译：

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二甲基二氧杂环丁酮的化学发光。激发单线态和三线态丙酮的单分子生成。化学引发的电子交换发光，主要的发光反应

摘要 : 二甲基二氧杂环丁酮 (2a) 经历两种不同的热反应，产生电子激发态。2a 在 30.0 C 的单分子分解产生激发的单线态和三线态丙酮，效率分别为 0.1% 和 1.5%。形成单线态丙酮的复合活化能比2a热消失的活化能大3-4 kcal/mol。这一结果被解释为二氧杂环丁酮分解的两条平行竞争途径，其中活性更高的一条导致激发的丙酮。添加易氧化的芳烃或胺类催化2a的化学发光。催化速率常数的大小和光产生效率与烃的单电子氧化电位相关。在这些条件下，化学发光由化学引发的电子交换发光 (CIEEL) 路径产生。（作者）