Pulse Radiolysis Study of the Reactions of Hydrogen Atoms in the Ionic Liquid Methyltributylammonium Bis[(trifluoromethyl)sulfonyl]imide
作者:Jan Grodkowski、Pedatsur Neta、James F. Wishart
DOI:10.1021/jp035265p
日期:2003.11.1
Reactions of hydrogen atoms with pyrene, phenanthrene, benzophenone, 2-propanol, and crotonic acid in the ionic liquid methyltributylammonium bis[(trifluoromethyl)sulfonyl]imide (R4NNTf2) were studied by pulse radiolysis. Radiolysis of the ionic liquid leads to formation of dry electrons and solvated electrons, which are scavenged by H3O+ to produce H• atoms. Hydrogen atoms react very rapidly with
通过脉冲辐解研究了离子液体甲基三丁基铵双[(三氟甲基)磺酰]亚胺(R4NNTf2)中氢原子与芘、菲、二苯甲酮、2-丙醇和巴豆酸的反应。离子液体的辐解导致形成干电子和溶剂化电子,它们被 H3O+ 清除以产生 H• 原子。氢原子与芘 (3.8 × 109 L mol-1 s-1) 和菲 (2.9 × 109 L mol-1 s-1) 反应非常迅速,分别在 405 和 395 nm 处形成具有尖锐吸收峰的 H-加合物自由基. 它们还与二苯甲酮反应形成环加合物,但反应要慢得多。通过与芘的竞争动力学,H• 原子与 2-PrOH 和巴豆酸反应的速率常数估计分别为 ≈6 × 107 和 4.6 × 109 L mol-1 s-1。所有速率常数,除二苯甲酮外,与水溶液中相同反应的测量或估计值相似。与芳香烃的反应...