RELATIONSHIP BETWEEN 4-STATE DELINEATION AND 2-STATE DELINEATION IN ELECTRON-TRANSFER REACTIONS AND EXCITATION TRANSFER

The method of obtaining the transition rate between the initial and fi nal states of the whole system which is usually applied to electron tr ansfer reactions is called the two-state delineation. On the other han d, the method of obtaining the transition rate by the resonance mechan ism between de-excitation of a donor and excitation of an acceptor whi ch is usually applied to excitation transfers is called the four-state delineation. We prove that a clear relationship exists between formul as obtained by the two-state and four-state delineations. Based on thi s relationship, we can suggest some erroneous points when one uses the two-state delineation for the electron transfer reaction in some mole cular systems.