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Marcus theory. Originally introduced by R. A. Marcus in 1956 as a method for calculating rates of electron transfer in outer-sphere processes. It has since been extended and refined significantly to address a variety of different types of transformations.
12 Ιουλ 2019 · Resonance energy transfer (RET), the transport of electronic energy from one atom or molecule to another, has significant importance to a number of diverse areas of science.
Because the process operates most efficiently between near-neighbor chromophores, the resonance propagation of energy through such a system generally takes the form of a series of short steps; an alternative process involving fewer long steps proves considerably less favorable.
to calculate the transition rates we introduce two molecules one emitting the excitation energy (the donor) and one accepting the energy (the acceptor); the adiabatic wave functions for both molecules (m = D, A) read: ΨmaM(rm; Rm) = φma(rm; Rm)χmaM(Rm)
Förster’s theory and his accompanying experimental work on the energy transfer are the most widely known, and most influential, of all energy transfer publications. His major papers are listed here [12–22].
11 Mechanisms of Energy Transfer. The energy transfer processes could be classified as follows: (a) The energy trans fer could be a short-range (distances of several Angstroms) and a long-range (dis tances up to several tens of Angstroms). In short distances the electronic clouds of the donor and acceptor are sufficiently overlapped.
In a following development of the theory Marcus introduced a generalized reaction coordinate (the energy difference of the two energy surfaces at each point) and the problem of the multidimen-sional PESs was reduced, by a statistical mechanical averaging, to a discussion in terms of free energy curves. Fig. 6∗.