权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Time-resolved dissociative electron attachment

时间分辨解离电子附着

基本信息

批准号：
EP/R023085/1
负责人：
Jan Verlet
金额：
$ 47.45万
依托单位：
Durham University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FR023085%2F1
关键词：
Time resolved dissociative electron attachment

项目摘要

Chemical changes can be driven by the reaction of molecules with atoms, molecules, heat, light or electrons. All of these types of reactions have been studied extensively over the past century. In particular, their study under isolated (gas-phase) conditions enables the atomic-level details of the chemical dynamics to be uncovered. More recently, with the advent of short pulsed lasers in the 1980's, all of these isolated reactions have been studied at the timescales of the atomic motion in complex molecules, with the notable exception of electron driven reactions. One of the most important electron driven chemical reactions is that of dissociative electron attachment in which an electron breaks apart a molecule leaving a neutral and negatively charged fragment. The current proposal outlines two experimental methods that will enable the direct measurement of dissociative electron attachment for the first time. The outcomes will provide a new platform to study a wide range of such reactions and a few atmospherically important reactions will be studied to demonstrate the applicability of the methods. The outcomes will provide valuable insight into the fundamental nature of these electron driven reactions. This fundamental insight is crucial because the computational modelling of dissociative dynamics is still beyond the current state-of-the-art except for the smallest molecular systems. From a broader perspective, understanding electron driven chemistry will ultimately enable control and rational design of such processes, which is technologically exploitable. For example, plasma-reactions are employed in molecular coating, etching, and semi-conductor technologies.

化学变化可以由分子与原子、分子、热、光或电子的反应驱动。在过去的世纪里，所有这些类型的反应都得到了广泛的研究。特别是，他们在隔离（气相）条件下的研究使化学动力学的原子级细节得以揭示。最近，随着20世纪80年代短脉冲激光的出现，所有这些孤立的反应都在复杂分子中原子运动的时间尺度上进行了研究，电子驱动反应是一个明显的例外。最重要的电子驱动的化学反应之一是解离电子附着，其中电子使分子分裂，留下中性和带负电荷的片段。目前的建议概述了两种实验方法，这将使直接测量解离电子附着的第一次。结果将提供一个新的平台，研究广泛的此类反应和一些大气重要的反应将进行研究，以证明该方法的适用性。这些结果将为深入了解这些电子驱动反应的基本性质提供有价值的见解。这个基本的见解是至关重要的，因为解离动力学的计算建模仍然超出了目前的最先进的最小的分子系统除外。从更广泛的角度来看，理解电子驱动化学将最终实现对这些过程的控制和合理设计，这在技术上是可以利用的。例如，等离子体反应用于分子涂层、蚀刻和半导体技术。