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arXiv 0705.2159cond-mat.mtrl-sciphysics.atm-clusphysics.chem-ph
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(OCS)2^-的密度泛函理论研究

Density functional theory study of (OCS)2^-

G. Bilalbegovic

摘要:

用密度泛函理论赝势方法计算了硫化羰二聚体阴离子的结构和电子性质。三种几何形状进行了优化和研究:C2 v和C2对称,以及一个不对称的结构。本文用Hirshfeld方法研究了三种同分异构体中过剩电荷的分布。在不对称(OCS)2^-异构体中,电荷在两个部分之间不是均等分配的,而是以OCS^{-0.6} OCS^{-0.4}的形式分布。采用含时密度泛函理论的Casida方法比较了三种异构体的低激发能级。

英文摘要:

The structural and electronic properties of the carbonyl sulfide dimer anion are calculated using density functional theory within a pseudopotential method. Three geometries are optimized and investigated: C2v and C2 symmetric, as well as one asymmetric structure. A distribution of an excess charge in three isomers are studied by the Hirshfeld method. In an asymmetric (OCS)2^- isomer the charge is not equally divided between the two moieties, but it is distributed as OCS^{-0.6} OCS^{-0.4}. Low-lying excitation levels of three isomers are compared using the time-dependent density functional theory in the Casida approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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