Analyzing cases of significant nondynamic correlation with DFT using the atomic populations of effectively localized electrons
Analyzing cases of significant nondynamic correlation with DFT using the atomic populations of effectively localized electrons
复制标题
使用有效局域电子的原子群来分析与 DFT 显着非动态相关的情况
DOI:
10.1007/s00214-022-02871-z
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发表时间:
2022
影响因子:
1.7
通讯作者:
Kong, Jing
中科院分区:
文献类型:
--
作者:
Lewis, Conrad;Proynov, Emil;Yu, Jianguo;Kong, Jing
Quantum multireference effects are associated with degeneracies and near-degeneracies of the ground state and are critical to a variety of systems. Most approximate functionals of density functional theory (DFT) fail to properly describe such effects. A number of diagnostics have been proposed to estimate in advance the reliability of a given single-reference solution in this respect. Some of these diagnostics, however, lack size-consistency while remaining computationally expensive. In this work, we propose the DFT method of atomic populations of effectively localized electrons (APELE) as a novel diagnostic in this vein. It is compared with existing diagnostics of nondynamic correlation on select exemplary systems. The APELE method is on average in good agreement with the popularT1index, while being size-consistent and less costly. It becomes particularly informative in cases involving bond stretching or bond breaking. The APELE method is applied next to organic diradicals like the bis-acridine dimer and the p-quinodimethane molecule which possess unusually high nonlinear optical response, and to the reaction of ethylene addition to Ni dithiolene. Our results for this reaction are consistent with theT1diagnostics and in addition, shed some light on the degree of d-electron localization at the Ni center.
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影响因子:
2.9
作者:
Nakano, M;Kishi, R;Yamaguchi, K
通讯作者:
Yamaguchi, K
影响因子:
2.8
作者:
L. Lain;A. Torre;R. Bochicchio;R. Ponec
通讯作者:
R. Ponec
DOI:
10.1021/acs.jpca.6b10468
发表时间:
2016
期刊:
The journal of physical chemistry. A
影响因子:
--
作者:
Liu,Fenglai;Furlani,Thomas;Kong,Jing
通讯作者:
Kong,Jing
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Kotaro Fukuda;Masayoshi Nakano
通讯作者:
Masayoshi Nakano
影响因子:
5.5
作者:
Kong, Jing;Proynov, Emil
通讯作者:
Proynov, Emil