Time-Resolved ESR Imaging of the Functional Materials

我们的目的是利用时间分辨ESR谱和时空分辨ESR谱来阐明光导材料的光功能机理。用时间分辨ESR波谱研究了单分子型光导TTF衍生物和施主-接受型共价有机骨架(COF)的自旋动力学。我们成功地直接观察到了电荷分离态，并估算了电荷分离态的寿命。具有超长寿命的COF体系可以被认为是一种高效的光导材料。完成了时间-空间分辨ESR系统的研制。然而，我们无法获得足够的空间分辨率。因此，需要对磁场梯度线圈进行改进。

Our purpose is to clarify the photo-functional mechanism of the photoconductive materials by using the time-resolved ESR spectroscopy and time-space-resolved ESR spectroscopy. Spin dynamic for single-molecule-type photoconductive TTF derivatives and donor-acceptor-type covalent organic framework (COF) was examined by using time-resolved ESR spectroscopy. We are successful to observe the charge separated state directly and to estimate the lifetime of the charge separated state. The COF systems with extremely long lifetime could be regarded as one of the high-efficient photoconductive materials. The development of the time-space-resolved ESR system is completed. However, we can not get enough space resolution. Therefore, we need to improve the field gradient coil.