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

1.通过使用分子组装体如提供水-有机界面的合成双层，研究了从卟啉（在界面处）到各种类型的紫精（作为受体）的光诱导电子转移。在带正电的双层反应的情况下，当带负电的紫精用作电子受体时，在施加外磁场时，光还原紫精的产率增加。这表明反应过程中自由基对保持一定距离，电子自旋-自旋相互作用仍然存在。另一方面，带正电荷的紫精在电子转移后迅速离开双层膜表面，磁场效应没有消失.利用外磁场效应研究了AOT反胶束体系中两亲性卟啉与水溶性紫精之间的光诱导电子转移。结果表明，AOT微水池为自由基反应提供了“笼”状的微环境，伪交联体系被破坏.研究了两亲性给体化合物在AOT反胶束表面的双光子电离。电离效率由水池的大小控制。电子自旋回波研究还表明，水-有机界面上的供体位置的几何形状由胶束的微环境如水池大小控制。

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.