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Marcus theory is a theory originally developed by Rudolph A. Marcus, starting in 1956, to explain the rates of electron transfer reactions – the rate at which an electron can move or jump from one chemical species (called the electron donor) to another (called the electron acceptor). It was originally formulated to address
25 Mar 2008 12.2 MARCUS THEORY. 1. The displaced harmonic oscillator (DHO) formalism and the Energy Gap Hamiltonian have been used extensively in describing charge transport reaction, such as electron and proton transfer. Here we describe the rates of electron transfer between weakly coupled donor and
coordinate. Marcus Theory (Nobel Prize 1992) electron transfer determined by solvent reorganization energy reaction ox red. ?G. Eact. Freitag, 20. November 2009
The Marcus Theory of Electron Transfer. A great many important aspects of biology and biochemistry involve electron transfer reactions. Most significantly, all of respiration (the way we get energy from food and oxygen) and photosynthesis (they way plants make the food and oxygen we consume) rely entirely on electron
16 Dec 2011 Marcus theory of electron transfer. Not quite as the Chemical Reaction picture. • The transfer of the electron is not a good reaction coordinate; it is not the slow variable. Not quite as the Franck-Condon picture. • Vertical excitation does not conserve energy; electron transfer reactions also occur in the dark. G.
Electron transfer (ET) is one of the most important chemical process in nature and it plays a central role in many biological, physical and chemical. (both organic and inorganic) systems. In nature ET occurs in photosynthetic reaction center where transfer of electrons is used to create charge imbalance across a membrane
1 Dec 2010 1984 – Study by Miller and Closs Definitively Proves the Inverse Region Pivotal to Marcus Theory. ? 1988 – Deisenhofer, Michel, and Huber Win Nobel Prize in Chemistry for Solving Structure of Purple Bacteria. Photosynthetic Complex and find ET Processes Involved Adhere to Marcus Theory.
Marcus-Hush theory. Marcus theory was further extended to inner sphere electron transfer reactions by Noel Hush. Parabolic potential energy curves were derived in this case from harmonic oscillator potentials. The final formulation is practically identical to Marcus' (Hush's formulation is known as Marcus-Hush theory) and
From a molecular perspective, Marcus theory is typically applied to outer sphere. ET between an electron donor In transition state theory a reaction coordinate is introduced so that the potential energy surface can be Hush provided an analysis of IT band shapes based on parameters that also define the electron-transfer
charge pairing is rapid, ?G0 can be approximately estimated by the following equation: ?G0 ? ED/Dю АрEA/Aю ю ED* ЮА e2 e. рrDю ю rAА Ю р1.8Ю. Figure 1.3 Variation in the logarithm of the rate constant of electron transfer with the driving force for the reaction after Marcus [50]. 4j1 Electron Transfer Theories
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