变量希尔什菲尔德分区:一般框架和增量变量希尔什菲尔德分区方法
Farnaz Heidar-Zadeh1, Carlos Castillo-Orellana2, Maximilian van Zyl1
1Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L-3N6, Canada.
Journal of chemical theory and computation
|November 8, 2024
概括
我们开发了增量变异希尔什菲尔德 (AVH),这是一个用于分子电子密度的新型分区方案. AVH提供了化学解释的原子电荷和强大的计算方法.
科学领域:
- 量子化学 是一个量子化学.
- 计算化学计算化学
- 理论化学 理论化学
背景情况:
- 对于分离分子电子密度的现有方法有局限性.
- 变量希什菲尔德分区为密度近似提供了一个灵活的框架.
- 需要严格的数学和化学直观的分区方案.
研究的目的:
- 介绍变量希什菲尔德分区的一般数学框架.
- 确定该框架中最适合的f-分歧测量.
- 开发一个新的,强大的,化学可解释的分区方案.
主要方法:
- 尽量减少分子密度和基础函数之间的f-分歧.
- 使用扩展的库尔巴克-莱布勒分歧.
- 通过原子/离子密度的线性组合构建亲分子密度 (附加变异希尔什菲尔德 - AVH).
主要成果:
- 扩展的库尔巴克-莱布勒分歧是唯一合适的f-分歧量.
- 开发的AVH方法与尺寸一致,并产生独特的解决方案.
- AVH从孤立的原子状态产生化学上敏感的原子电荷,其变形最小.
结论:
- 增量变量希尔什菲尔德 (AVH) 为电子密度分区提供了一个数学上健全和计算上稳健的方法.
- AVH提供了一个类似于价值键的分子密度分解.
- 该方法产生了可解释的原子电荷,推进了分子性质分析.
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