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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Modeling the charge transfer between alkali metals and polycyclic aromatic hydrocarbons using electronic structure methods
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Modeling the charge transfer between alkali metals and polycyclic aromatic hydrocarbons using electronic structure methods

机译:使用电子结构方法模拟碱金属和多环芳烃之间的电荷转移

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摘要

The interaction of alkali metals-specifically, lithium-with polycyclic aromatic hydrocarbons (PAHs) was studied using a variety of electronic structure methods. Electron transfer from lithium to a PAH depends on the size and structure of the PAH and the electronic structure method used. In some cases, we observe an artificial transfer when using density functional theory (DFT) due to the self-interaction error, whereas Hartree-Fock underestimates the amount of charge transfer due to overlocalization. Our results have interesting implications for the validity of DFT calculations on the alkali metal-PAH interaction in Li batteries, hydrogen storage devices, and alkali-metal-doped superconductors.
机译:使用多种电子结构方法研究了碱金属,特别是锂与多环芳烃(PAHs)的相互作用。从锂到PAH的电子转移取决于PAH的大小和结构以及所用的电子结构方法。在某些情况下,由于自相互作用误差,我们在使用密度泛函理论(DFT)时会观察到人工转移,而Hartree-Fock低估了由于过度本地化导致的电荷转移量。我们的研究结果对锂电池,储氢装置和碱金属掺杂超导体中碱金属-PAH相互作用的DFT计算的有效性具有有趣的意义。

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