Saak Clara-Magdalena, Unger Isaak, Gopakumar Geethanjali, Caleman Carl, Björneholm Olle
Department for Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden.
Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron, DE-22607 Hamburg, Germany.
J Phys Chem Lett. 2020 Apr 2;11(7):2497-2501. doi: 10.1021/acs.jpclett.0c00158. Epub 2020 Mar 16.
Auger spectroscopy has previously been used to study changes in the hydrogen bond network in liquid water, but to the best of our knowledge it has not been used to track such changes as a function of temperature. We show Auger spectroscopy to reflect the weakening of the hydrogen bond network upon heating. This shows that the radiation response of water, i.e., the relative propensity of the different processes occurring after radiation exposure, including femtosecond proton dynamics, depends on the temperature of the system. This proof-of-principle study further demonstrates the suitability of the technique to help elucidate information on the intermolecular structure of liquids such as water, opening the door to further temperature-dependent studies.
俄歇电子能谱此前已被用于研究液态水中氢键网络的变化，但据我们所知，它尚未被用于追踪此类随温度变化的情况。我们展示了俄歇电子能谱能够反映加热时氢键网络的减弱。这表明水的辐射响应，即辐射暴露后发生的不同过程（包括飞秒质子动力学）的相对倾向，取决于系统的温度。这项原理验证研究进一步证明了该技术适用于帮助阐明诸如水等液体分子间结构的信息，为进一步的温度相关研究打开了大门。
