Magnetic Field Effect on Photoinduced Electron Transfer Reaction Associated with Hydrogen Bond Formation in Homogeneous Medium

摘要

The effect of low magnetic field (MF) of the order of 0.01-0.08 T on the reactions involving spin-correlated radical ion pairs generated through electron transfer as intermediates is an interplay between diffusion dynamics and spin dynamics of the individual radical ions in the solvent cage. In this paper, we have made an attempt to study photoinduced electron transfer reactions between three aromatic amines and acridone in ethanol medium using a weak external MF. Although the MF effect is conventionally observed appreciably in heterogeneous organized medium, in the present case a considerable MF effect is obtained in homogeneous medium, i. e., ethanol. The occurrence of this rare phenomenon has been attributed to the presence of water molecules as impurities in ethanol.