Kotsina Nikoleta, Townsend Dave
Institute of Photonics & Quantum Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
Phys Chem Chem Phys. 2021 May 12;23(18):10736-10755. doi: 10.1039/d1cp00933h.
Time-resolved photoelectron imaging (TRPEI) is a highly differential technique for the detailed study of non-adiabatic energy redistribution dynamics operating in the electronically excited states of molecules following the absorption of ultraviolet light. This Perspective briefly reviews the main elements of the TRPEI method but also seeks to address some of its limitations. With the help of various examples drawn from our own recent work, we illustrate some of the challenges commonly encountered during the analysis and interpretation of experimental data and introduce some initial thoughts on approaches to help deal with them. We also discuss some novel methods that aim to expand the capabilities and utility of the TRPEI technique by extending the observation window along the photochemical reaction coordinate(s) and improving the temporal resolution. Given the widespread use of TRPEI and related ultrafast spectroscopies, we anticipate that this Perspective will be of broad interest to a sizeable research community. Furthermore, we hope it will also serve as a useful overview for those engaging with this topic for the first time.
时间分辨光电子成像（TRPEI）是一种高分辨率技术，用于详细研究分子在吸收紫外光后处于电子激发态时发生的非绝热能量重新分布动力学。本综述简要回顾了TRPEI方法的主要内容，但也试图解决其一些局限性。借助我们近期工作中的各种实例，我们阐述了在分析和解释实验数据时常见的一些挑战，并介绍了应对这些挑战的初步思路。我们还讨论了一些新颖的方法，这些方法旨在通过沿光化学反应坐标扩展观测窗口并提高时间分辨率来扩展TRPEI技术的能力和实用性。鉴于TRPEI及相关超快光谱技术的广泛应用，我们预计本综述将受到相当规模研究群体的广泛关注。此外，我们希望它也能为首次接触该主题的人提供有用的概述。
