@E02256@ occurring as a result of an electron exchange mechanism. It requires an overlap of the wavefunctions of the energy donor and the energy acceptor. It is the dominant mechanism in @T06506@. The transfer @O04322@, \(k_{\mathrm{ET}}\), is given by: \[k_{\text{ET}}\propto \frac{h}{2\ \pi }\ P^{2}\ J\ \text{e}^{\frac{-2\ r}{L}}\] where \(r\) is the distance between donor (D) and acceptor (A), \(L\) and \(P\) are constants not easily related to experimentally determinable quantities, and \(J\) is the @S05818@ integral. For this mechanism the spin conservation rules are obeyed.
See also:
radiative energy transfer
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2235 [Terms] [Paper]