开放物种的电子结合能量来自对角电子传播器自能与不受限制的Hartree-Fock旋转轨道
Ernest Opoku1, Filip Pawłowski1, J V Ortiz1
1Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849-5312, United States.
The journal of physical chemistry. A
|August 14, 2024
概括
通过在无限制的哈特里-福克 (UHF) 理论中使用对角自能近似来改进分子中电子结合能量的准确计算. 提供了建议,以优化这些量子化学计算的准确性和效率.
科学领域:
- 量子化学 是一个量子化学.
- 计算化学的计算化学
- 理论化学 理论化学
背景情况:
- * 价值电子结合能量对于理解分子电子结构至关重要.
- * Ab initio电子传播器方法为封闭外分子提供了准确和高效的计算.
- *对角自我能量近似提高了电子传播器方法的计算效率.
研究的目的:
- * 在不受限制的哈特里-福克 (UHF) 旋转轨道基础上研究对角形自我能量近似的预测能力.
- * 建立计算分子电子结合能,电离能和电子亲和力的最佳实践.
- * 将计算结果与实验数据和高级相关计算进行比较.
主要方法:
- * 采用从头开始的电子传播器方法,对角形自我能量近似值.
- * 将这些近似推广到超高频理论的规范旋转轨道基础上.
- *利用实验性原子电子结合能和对开分子的相关计算作为基准.
主要成果:
- *对角自我能量近似显示,当扩展到UHF旋转轨道基础时,具有预测能力.
- * 当使用对角形自我能量近似时,UHF的库普曼斯标识必须具有定性准确性.
- *对于电离能和电子亲和性,封闭外的参考状态比开放外状态更为可取.
- *电子脱离能量的计算比对双胞胎和三胞胎的电子附着能量的计算更准确和高效.
结论:
- * 为优化分子电子结合能量的计算提供了建议.
- *遵循这些准则可以导致平均绝对误差约为0.05 eV.
- *这项研究提高了量子化学计算方法的准确性和效率.
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