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arXiv 1507.01212physics.chem-ph
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静态分子极化率密度泛函的选择

Choosing a density functional for static molecular polarizabilities

Taozhe Wu, Yulia N. Kalugina, Ajit J. Thakkar

摘要:

用耦合团簇法计算了145个有机分子的静态电子偶极极化率,并建立了一个参考数据集。分子由碳、氢、氮、氧、氟、硫、氯和溴原子组成。它们的大小从三原子到14个原子不等。Hartree-Fock和二阶Møller-Plesset方法和34个密度泛函,包括局部泛函,全局混合泛函和远程校正和屏蔽交换品种的范围分离泛函,对这个数据集进行了测试。在此基础上,对有机小分子极化率计算中密度泛函的选择提出了详细的建议。

英文摘要:

Coupled-cluster calculations of static electronic dipole polarizabilities for 145 organic molecules are performed to create a reference data set. The molecules are composed from carbon, hydrogen, nitrogen, oxygen, fluorine, sulfur, chlorine, and bromine atoms. They range in size from triatomics to 14 atoms. The Hartree-Fock and 2nd-order Møller-Plesset methods and 34 density functionals, including local functionals, global hybrid functionals, and range-separated functionals of the long-range-corrected and screened-exchange varieties, are tested against this data set. On the basis of the test results, detailed recommendations are made for selecting density functionals for polarizability computations on relatively small organic molecules.

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