在非adiabatic动力学中的基准密度函数近似:在视网膜模型中的Trans-Cis异体化
Lea M Ibele1, Carlo Adamo2, Davide Avagliano2
1Aix Marseille University, CNRS, ICR, 13397 Marseille, France.
Journal of chemical theory and computation
|September 30, 2025
概括
这项研究对非adiabatic动态的密度函数近似 (DFAs) 进行了基准测试. 双杂交功能表现为准确建模质子希夫基3 (PSB3) 的光异构.
科学领域:
- 计算化学计算化学
- 量子化学 是一个量子化学.
- 理论化学 理论化学
背景情况:
- 对于光化学而言至关重要的非交互动力学,对时间依赖密度函数理论 (TD-DFT) 具有挑战性.
- 质子希夫基3 (PSB3) 光异构化为评估计算方法提供了一个复杂的基准案例.
- 精确建模激发状态过程需要强大的理论框架.
研究的目的:
- 为非adiabatic动态进行各种密度函数近似 (DFAs) 的详尽基准.
- 对PSB3系统的高级参考方法来评估不同DFA家族的性能.
- 为了确定适合的DFAs对未来研究的非adiabatic过程.
主要方法:
- 在非adiabatic动态中对DFAs进行基准测试的严格协议的开发,涵盖初始化,模拟和评估.
- 多个DFA家族的比较,包括局部函数和具有高Hartree-Fock交换的函数,与RMS-CASPT2参考数据进行比较.
- 沿相关扭矩坐标进行静态能量扫描,以分析潜在能量表面.
主要成果:
- 电子群体被认为是评估动态准确性的不可靠指标.
- 当地功能体显示出良好的人口衰减,但遵循了不正确的失活路径.
- 具有100%哈特里-福克交换的函数式预测了正确的异构化,但具有不准确的时间尺度和量子产量.
- 双混合功能,特别是那些平衡非局部交换/相关性和采用范围分离的功能,准确地复制了参考能量配置文件.
结论:
- 某些双混合密度函数近似显示出对准确的非adiabatic动力学模拟具有显著的前景.
- DFA的选择对反应路径,时间尺度和光异构化中的量子产量预测产生了重大影响.
- 进一步开发和实施这些先进的DFAs的分析梯度对于推进非adiabatic动态领域至关重要.
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