验证三角形SCF和斯莱特的过渡状态理论,用于计算核心电离能
Kimihiko Hirao1,2, Takahito Nakajima2, Bun Chan2,3
1Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto, Japan.
Journal of computational chemistry
|September 14, 2023
概括
本研究介绍了转移的斯莱特.
科学领域:
- 计算化学计算化学
- 量子化学 是一个量子化学.
- 原子和分子物理 原子和分子物理
背景情况:
- 核电离能对于理解分子电子结构至关重要.
- 像 ΔSCF 和 Slater 过渡状态 (STS) 这样的传统方法存在自我交互错误 (SIE).
- 准确地预测核心的电离能,对于光谱学和化学分析至关重要.
研究的目的:
- 评估Slater转移过渡状态 (STS) 方法计算核心电离能量的准确性.
- 评估不同计算方法 (哈特里-福克,科恩-沙姆) 和函数 (BH&HLYP,B3LYP,LC-BOP) 的性能.
- 调查转移方案在纠正自我交互错误方面的有效性.
主要方法:
- 使用哈特里-福克 (HF) 和科恩-沙姆 (KS) 方法计算了各种第二和第三周期元素的核心电离能.
- 采用了 ΔSCF, STS 和两种新型转移 STS (STS ((1) 和 STS ((2)) 方法.
- 利用特定原子的转移参数来纠正自我相互作用错误.
主要成果:
- 移动STS(1) 紧密地复制了ΔSCF结果,平均绝对偏差 (MAD) 为0.02 eV.
- 转移的STS(2) 在不同功能上显示了最小的变化,并且与实验值有很好的一致性.
- 从实验数据中转移的STS(2) 的偏差为0.24 eV (BH&HLYP),0.19 eV (B3LYP) 和0.23 eV (LC-BOP).
结论:
- 转移的STS方法有效地纠正核心电离能计算中的自我相互作用错误.
- 转移的STS(2) 方法在各种功能上显示出强大的性能和准确性.
- 这些发现支持转移STS方法用于预测核心电离能量的实用性.
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