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[求助]
第二電離能是不是等于-HOMO-2的本征值?
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| 分子團(tuán)簇被電離時(shí)有沒(méi)有第二電離能?如果有,根據(jù)koopmans原理第二電離能是不是等于-HOMO-2的本征值? |

木蟲(chóng) (小有名氣)
專家顧問(wèn) (職業(yè)作家)
地溝油冶煉專家
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專家經(jīng)驗(yàn): +458 |

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如果是HF呢?KS(ks軌道是DFT計(jì)算的吧?)軌道經(jīng)過(guò)線性矯正之后不是跟實(shí)驗(yàn)值近似嗎?Theoretical Aspects of Chemical Reactivity一書(shū)第8章第一節(jié)有一句話:However, the iKS (ks軌道本征值)show the interesting feature that, for a given exchange/correlation functional, the difference Ii −iKS(電離能-本征值) is fairly uniform for all of the valence orbitals in a molecule.不知道跟你說(shuō)的一樣不? |

木蟲(chóng) (小有名氣)
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The ionization potential is defined as the amount of energy required to remove an electron from a molecule, computed as the energy difference between the cation and the neutral molecule. For example, the ionization potential of PH2 may be computed as: E(PH2+)-E(PH2) From: Exploring chemistry with electronic structure methods, page 143. |
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