论文标题

在桦木还原的背景下,桥接电化学和光电子光谱学:电子,二电和苯二元的脱氧能量和氧化还原电位在液体氨中

Bridging Electrochemistry and Photoelectron Spectroscopy in the Context of Birch Reduction: Detachment Energies and Redox Potentials of Electron, Dielectron, and Benzene Radical Anion in Liquid Ammonia

论文作者

Nemirovich, Tatiana, Kostal, Vojtech, Copko, Jakub, Schewe, H. Christian, Bohacova, Sona, Martinek, Tomas, Slanina, Tomas, Jungwirth, Pavel

论文摘要

桦木还原是一种氢化芳族碳氢化合物(例如苯)的时间证实的方法,它依赖于从碱金属释放到液体氨中释放的电子的还原能力。我们成功地表征了桦木还原过程的关键中间体 - 使用环状伏安法和光电子光谱法,溶剂化的电子和二元子和苯基阴离子 - 在电子结构计算的帮助下。通过这种方式,我们不仅量化了这些物种的电子结合能,这些能量对反应的机理起决定性作用,而且还使用桦木还原作为案例研究直接连接两种看似无关的实验技术。

Birch reduction is a time-proven way to hydrogenate aromatic hydrocarbons (such as benzene), which relies on the reducing power of electrons released from alkali metals into liquid ammonia. We have succeeded to characterize the key intermediates of the Birch reduction process - the solvated electron and dielectron and the benzene radical anion - using cyclic voltammetry and photoelectron spectroscopy, aided by electronic structure calculations. In this way, we not only quantify the electron binding energies of these species, which are decisive for the mechanism of the reaction but also use Birch reduction as a case study to directly connect the two seemingly unrelated experimental techniques.

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