10 T Solenoid Magnet

自由基对的自旋化学在光合作用或鸟类的磁罗盘中起着重要的作用，而且在许多光电子器件中也起着重要的作用，如有机发光二极管。为了研究分子三体和二体中电荷分离态的自旋化学，我们进行了依赖于磁场的时间分辨光谱分析。有几种机制解释了自旋演化，它具有特征的磁场依赖性。在最近对几个三联体和双联体的研究中，我们观察到了一种出人意料的明显的高场效应，它始于比已知的Delta-g效应低得多的场。为了弄清这种高场效应的起源，我们必须在比我们目前所能应用的最大场2T高得多的场下进行测量。为此，我们申请了一台10吨的磁铁。只有通过扩展到大范围的场的详细表征，我们才能阐明二元体和三元体的自旋化学。这对于更好地控制分子体系和基于这些材料的光电子器件中的电子转移过程具有重要意义。

The spin chemistry of radical pairs plays an important role in photosynthesis or in the magnetic compass of birds but also in many optoelectronic devices such as OLEDs.In order to investigate the spin chemistry of charge-separated states in molecular triads and dyads we perform magnetic field dependent time-resolved optical spectroscopy. Several mechanisms account for the spin evolution which possess a characteristic magnetic field dependence. In recent investigations of several triads and dyads we observed a an unexpected pronounced high-field effect which started at much lower field than the known delta-g effect. In order to clarify the origin of this high-field effect we have to perform measurements at much higher field than the 2 T which is the maximum field we can apply currently. For this reason we apply for a 10 T magnet. Only by a detailed characterization extending over large field regions we can elucidate the spin chemistry in the dyads and triads. This is important for better controlling the electron transfer processes in molecular systems and in optoelectronic devices based on these materials.