Investigations on Magnetic Field Effects in Carotenoid-Porphyrin-Fullerene Triads

如果反应通过自由基对进行，则化学反应的产物产率和动力学可以受到磁场的影响。拟议调查的目标是确定这种磁场效应的强度和方向性的因素。为了获得这种洞察力，一些不同的胡萝卜素，卟啉，富勒烯三元组的研究与几个实验和理论方法和响应磁场的差异进行了分析。所用的实验方法包括瞬态吸收光谱以及不同的时间相关的电子顺磁共振实验在弱和强的领域。这些都是由时间无关和时间依赖的密度泛函理论为基础的计算补充。研究结果可以帮助设计一种优化的磁场传感器（磁罗盘），并帮助理解许多动物，特别是候鸟的磁场感应能力的起源。

The product yields and kinetics of chemical reactions can be influenced by magnetic fields if the reactions proceed via radical pairs. The goal of the proposed investigations is to determine the factors governing the strength and directionality of such magnetic field effects. To gain this insight, a number of different carotene-porphyrin-fullerene triads are investigated with several experimental and theoretical methods and the differences in response to magnetic fields analysed. The used experimental methods include transient absorption spectroscopy as well as different time dependent electron paramagnetic resonance experiments in weak and strong fields. These are complemented by time independent and time dependent density functional theory based calculations. The results could help in designing an optimised magnetic field sensor (magnetic compass) and help understanding the origin of the magnetic field sensing ability of many animals, specifically of migratory birds.