Electron transfer (ET) is the process by which an electron moves from one atom or molecule to another atom or molecule. They are redox reactions where the formal oxidation states of both reaction partners change (metal ions are uniquely useful for this). ET arises out of nature's need to move electrons (reducing equivalents) or holes (oxidizing equivalents) from one site to another. Numerous essential processes in biology require ET, including: oxygen binding/transport, photosynthesis/respiration, metabolic syntheses, and detoxification of reactive species. Properties The electron is a fundamental subatomic particle which carries a negative electric charge. ... Properties An atom (Greek άτομον from ά: non and τομον: divisible) is a submicroscopic structure found in all ordinary matter. ... A molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. ...
The theory of electron transfer was extensively studied by chemists and physicists. The chemists Henry Taube, Rudolph A. Marcus, Harry Gray, and physicist Revaz Dogonadze contributed greatly to electron transfer theory. There are two main classes of ET: Inner-sphere ET and Outer-Sphere ET. Inner-Sphere ET is defined as electron transfers where a common ligand bridges the two metal redox centers during ET event. Outer sphere ET are reactions where the coordination shells of the two metal redox centers remain intact during the ET. Look up chemist on Wiktionary, the free dictionary. ... A physicist is a scientist trained in physics. ... Professor Henry Taube, Ph. ... Rudolph Rudy Arthur Marcus (born July 21, 1923) received the 1992 Nobel Prize in Chemistry for advancing the theory of the Electron transfer chain during the Light-dependent reactions of photosynthesis. ... Revaz Dogonadze Revaz Dogonadze (November 21, 1931 - May 13, 1985) was a notable Georgian scientist, one of the founders of quantum electrochemistry, main author of the Quantum-Mechanical Theory of Kinetics of the Elementary Act of Chemical, Electrochemical and Biochemical Processes in Polar Liquids, Corresponding Member of the Georgian Academy...
The Biodesign researches use an ultrafast laser facility to capture 'snapshots' of the electrontransfer at femtosecond rates, or a fifteen millionth of a second.
This way of representing the electrontransfer process successfully captured the contribution of the protein movements to the rate of the reaction.
The scientists were then able to quantitatively model the effect of the mutations on the initial rate of photosynthetic electrontransfer and answer questions that had been haunting them for 20 years.
In the electrontransfer context, an adiabatic process is one in which no quantum jump occurs, - the electron lingers at the barrier, and the curves representing the two states smooth to form a continuum, with a quasi-state at the top of the activation barrier.
This is the energy required to transfer the electron from the bottom of the energy profile of the acceptor (product) state up to the energy profile of the acceptor state in the same nuclear configuration as the energy minimum of the donor state.
The benefits of the Born effect and of participation of large conjugate ring structures in electrontransfer are dependent on the quantum-mechanical properties of the electron.
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