Analysis and controlling of the spin-chemistry of charge separated states in molecular dyads and triads

分子二元组和三元组中电荷分离态自旋化学的分析和控制

• 批准号: 439533873
• 负责人: Professor Dr. Christoph Lambert
• 金额: --
• 依托单位: Institut für Organische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/439533873?language=en
• 关键词: Analysis; controlling; spin; chemistry; charge

The spin chemistry of radical pairs plays an important role in photosynthesis or the magnetic compass of birds but also in many optoelectronic devices such as OLEDs.The goal of this project is to investigate the dependence of the exchange interaction in molecular dyads and triads on molecular parameters. The exchange interaction is a central parameter which describes the nonclassical interaction (in contrast to the magnetic dipole-dipole interaction which has a classical analogue) of two spin bearing units. This interaction can be responsible for the time evolution of spin-correlated radical pairs. A deeper understanding of the exchange interaction thus is of utmost importance for the optimisation of optoelectronic processes. While the distance dependence of the exchange interaction follows an exponential law, not much is known about the dependence on molecular parameters such as the orientation of spin bearing units or the chemical and electronic nature of the bridge, which connects the spin centres. Therefore, these aspects are in focus of our project. By a deeper understanding of the spin chemistry we hope to be able to better control electron transfer processes in molecular systems.

激进对的自旋化学在光合作用或鸟类的磁性指南中起着重要作用，在许多光电设备（例如OLED）中也起着重要作用。该项目的目的是研究分子二元组和三合一对分子参数的交换相互作用的依赖性。交换相互作用是一个中央参数，它描述了两个旋转轴承单元的非经典相互作用（与具有经典类似物的磁性偶极偶极相互作用相反）。这种相互作用可能导致自旋相关的自由基对的时间演变。因此，对交换相互作用的更深入的了解对于优化光电过程至关重要。尽管交换相互作用的距离依赖性遵循指数定律，但对分子参数的依赖性并不多，例如旋转轴承单元的方向或连接旋转中心的桥的化学和电子性质的方向。因此，这些方面是我们项目的重点。通过对自旋化学的深入了解，我们希望能够更好地控制分子系统中的电子传递过程。