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The electron affinity of molecules is a complicated function of their electronic structure. For instance the electron affinity for benzene is negative, as is that of naphthalene, while those of anthracene, phenanthrene and pyrene are positive. In silico experiments show that the electron affinity of hexacyanobenzene surpasses that of fullerene. [5]
Electron affinity can be defined in two equivalent ways. First, as the energy that is released by adding an electron to an isolated gaseous atom. The second (reverse) definition is that electron affinity is the energy required to remove an electron from a singly charged gaseous negative ion.
The energy released when an electron is added to a neutral gaseous atom to form an anion is known as electron affinity. [15] Trend-wise, as one progresses from left to right across a period , the electron affinity will increase as the nuclear charge increases and the atomic size decreases resulting in a more potent force of attraction of the ...
Gold also forms a somewhat stable −1 state due to relativistic effects, and it has been suggested roentgenium may do so as well: [2] nevertheless, the electron affinity of roentgenium is expected to be around 1.6 eV (37 kcal/mol), significantly lower than gold's value of 2.3 eV (53 kcal/mol), so roentgenides may not be stable or even possible ...
One component is the difference in the work function (also called the electron affinity) between the two materials. [48] This can lead to charge transfer as, for instance, analyzed by Harper. [ 49 ] [ 50 ] As has been known since at least 1953, [ 37 ] [ 51 ] [ 52 ] [ 53 ] the contact potential is part of the process but does not explain many ...
The electron affinity (usually given by the symbol in solid state physics) gives the energy difference between the lower edge of the conduction band and the vacuum level of the semiconductor. The band gap (usually given the symbol E g {\displaystyle E_{\rm {g}}} ) gives the energy difference between the lower edge of the conduction band and the ...
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The binding energy of H − equals the binding energy of an extra electron to a hydrogen atom, called electron affinity of hydrogen. It is measured to be 0.754 195 (19) eV or 0.027 7161 (62) hartree (see Electron affinity (data page)). The total ground state energy thus becomes −14.359 888 eV.