Solvation dynamics of electrons in aqueous environments

水合电子在自然界中无处不在，是自由基反应物的来源，而自由基反应物是一系列学科的核心。在这里，将研究在两种不同环境中的阴离子激发后这种水合电子的产生。第一个环境是散体水，用瞬变吸收光谱研究其生成和复合动力学。第二个环境是水/空气和水/油界面，动力学将通过时间分辨的二次谐波产生来探测。后半部分的主要目的是了解溶剂化动力学在界面或跨界面的不同，以及将电子带到水界面的自由能如何随着界面的变化而变化。

Hydrated electrons are ubiquitous in nature and are a source of radical reactants that are central to a range of disciplines. Here, the production of such hydrated electrons will be studied following excitation of anions in two different environments. The first environment is bulk water and the production and recombination dynamics will be studied by transient absorption spectroscopy. The second environment is the water/air and water/oil interface, where the dynamics will be probed by time-resolved second harmonic generation. The main aim of the latter part is to understand how the solvation dynamics differ at or across interfaces and how the free energy of bringing an electron to a water interface changes as the interface changes.