SFB 377: Photoionisation and Charge Separation in Large Molecules,Clusters and in the Condensed Phase

SFB 377：大分子、团簇和凝聚相中的光电离和电荷分离

• 批准号: 5479254
• 金额: --
• 依托单位: Technische Universität München (TUM)
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 1995
• 资助国家: 德国
• 起止时间: 1994-12-31 至 2002-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5479254?language=en
• 关键词: SFB; 377; Photoionisation; Charge; Separation

The collaborative research centre 377 is mainly concerned with the explanation of ionisation and charge separation processes on the basis of a microscopic description of the energetics and dynamics. In order to obtain a deeper understanding of the coupling mechanisms of different systems, the time evolution of conformational changes which accompany the charge separation will be under investigation. The molecular systems are chosen in such a way, that the relevant electronic states can be sufficiently well defined, not only experimentally but also theoretically, so that the charge separation mechanisms can be well characterized. In order to separate the solvent effect, due to time-dependent long-range polarisation interactions, from intra molecular couplings, we study molecular clusters of variable size, which provide information about the build up of the solvation of the donor and acceptor units. A particular focus is on the ultrashort initial time evolution on the solvation dynamics in the femtosecond regime. In the condensed phase the investigations include the solvation dynamics of electrons in water, after photoionization the solvation dynamics for collision-induced charge separation processes on surfaces photoinduce charge separation processes in polymers and in onedimensional nanostructures such as the DNA strang.

合作研究中心377主要关注基于对能量学和动力学的微观描述来解释电离和电荷分离过程。为了更深入地了解不同体系的耦合机制，我们将研究伴随电荷分离的构象变化的时间演化。选择分子体系的方法是，不仅从实验上而且从理论上充分定义相关的电子态，以便能够很好地表征电荷分离机制。为了从分子内耦合中分离由于依赖时间的长程极化相互作用而产生的溶剂效应，我们研究了可变大小的分子团簇，它们提供了关于给体和受体单元的溶剂化的建立的信息。特别关注了飞秒区域内溶剂化动力学的超短初始时间演化。在凝聚相中，研究了电子在水中的溶剂化动力学，光电离后表面碰撞诱导电荷分离过程的溶剂化动力学，聚合物中的光诱导电荷分离过程以及一维纳米结构(如DNA链)中的溶剂化动力学。