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An electron transport chain (ETC[1]) is a series of protein complexes and other molecules which transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occurring simultaneously) and couples this electron transfer with the transfer of protons (H + ions) across a membrane.
The electron–hole pair is the fundamental unit of generation and recombination in inorganic semiconductors, corresponding to an electron transitioning between the valence band and the conduction band where generation of an electron is a transition from the valence band to the conduction band and recombination leads to a reverse transition.
e. An electron and an electron hole that are attracted to each other by the Coulomb force can form a bound state called an exciton. It is an electrically neutral quasiparticle that exists mainly in condensed matter, including insulators, semiconductors, some metals, but also in certain atoms, molecules and liquids.
Transition metal dioxygen complex. Dioxygen complexes are coordination compounds that contain O 2 as a ligand. [1][2] The study of these compounds is inspired by oxygen-carrying proteins such as myoglobin, hemoglobin, hemerythrin, and hemocyanin. [3] Several transition metals form complexes with O 2, and many of these complexes form reversibly. [4]
Electron transfer. Electron transfer (ET) occurs when an electron relocates from an atom, ion, or molecule, to another such chemical entity. ET describes the mechanism by which electrons are transferred in redox reactions. [2] Electrochemical processes are ET reactions.
Q cycle. Schematic representation of complex III of the electron transport chain. The grey area is the inner mitochondrial membrane. Q represents the ubiquinone form of CoQ, and QH 2 represents the ubiquinol (dihydroxyquinone) form. The Q cycle (named for quinol) describes a series of sequential oxidation and reduction of the lipophilic ...
In chemistry, charge-transfer (CT) complex, or electron donor-acceptor complex, describes a type of supramolecular assembly of two or more molecules or ions. The assembly consists of two molecules that self-attract through electrostatic forces, i.e., one has at least partial negative charge and the partner has partial positive charge, referred ...
While in atomic solids transport is intra -molecular, also known as band transport, in molecular solids the transport is inter -molecular, also known as hopping transport. The two different mechanisms result in different charge mobilities. In disordered solids, disordered potentials result in weak localization effects (traps), which reduce the ...