Application of Photoinduced Electron Transfer Reaction Across the Water-Organic Interface

1. 利用分子组件（如提供水-有机界面的合成双分子层）研究了卟啉（在界面处）到各种类型的紫素（作为受体）的光致电子转移。在带正电的双分子层上进行反应时，当带负电的双分子层用作电子受体时，在外加磁场的作用下，光还原紫素的产率增加。这说明自由基对在反应时间内保持了一定的距离，电子自旋-自旋相互作用仍然存在。另一方面，带正电的紫胶在电子转移后迅速离开双分子层表面，没有观察到磁场效应。利用外磁场效应研究了两亲性卟啉在AOT反胶束中向水溶性紫胶的光致电子转移。结果清楚地表明，AOT微水池在自由基反应中形成了“笼”状的特殊微环境，并观察到伪连接体系。研究了两亲性给体化合物在AOT反相胶束表面的双光子电离。电离效率受池池大小的控制。电子自旋回波研究还表明，水-有机界面上施主位置的几何形状受水池大小等胶束微环境的控制。

1. Photoinduced electron transfers from porphyrin (at the interface) to various type of viologen (as an acceptor) were investigated by the use of molecular assemblies such as a synthetic bilayer which provided a water-organic interface. In case of reactions at a positively charged bilayer, the yield of photoreduced viologen increased in the application of External Magnetic Field, when negatively charged viologen was used as an electron acceptor. This suggested that the radical pair kept a certain distance in the reaction time, and an electron spin-spin interaction remained. On the other hand, the positively charged viologen rapidly left away from the surface of the bilayer after the electron transfer, and a magnetic field effect was not observed.2. The photoinduced electron transfer from the amphiphilic porphyrin to the water soluble viologen in the AOT reversed micelles was investigated with External Magnetic Field Effect. The result clearly showed that the AOT micro-water pool gave a special microenvironment such as a "Cage" in the radical reactions and that the pseudo-linked system was observed.3. The biphotonic ionization of amphiphilic donor compound on the surface of AOT reversed micelles was also studied. The ionization efficiency was controlled by the size of the water pool. The Electron Spin Echo study also showed that the geometry of the donor position on the water-organic interface was controlled by the microenvironment of the micelles such as water pool size.