新型计算化学基础设施用于模拟水中的度:从基数组到使用粒子队群优化的力场
Kennet J Rueda Espinosa1, Alexei A Kananenka1, Alexander A Rusakov2
1Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, United States.
Journal of chemical theory and computation
|November 28, 2023
概括
我们为重元素开发了一个新的计算框架,为水中的阿斯他离子创建了准确的模型. 这项研究使医疗同位素和超重元素的模拟更好.
科学领域:
- 计算化学的计算化学
- 相对论量子化学 相对论量子化学
- 化学物理 化学物理
背景情况:
- 阿斯 (At) 是最重的自然存在的素,At-211显示了医疗潜力.
- 模拟重元素需要考虑强大的相对论效应.
- 准确的计算模型对于理解和利用这些元素至关重要.
研究的目的:
- 为具有强烈相对论效应的重元素大规模计算模型提出一个新的基础设施.
- 为水中的阿斯他离子 (At-) 开发精确的力场.
- 建立一个框架,为相对论密度函数理论 (DFT) 创建两极化一致的基础集.
主要方法:
- 使用粒子群优化开发了相对论DFT的新型基础集.
- 将两极化一致的基础设想扩展到重元素.
- 执行了相对论 DFT 计算,并与结合集群进行了验证,其中包含单项,双项和三项 (CCSD(T)) 结果.
- 计算的力场参数,辐射分布函数,扩散系数和At-在水中的水化能量.
主要成果:
- 设计和验证了相对论DFT的新基础集,最大限度地减少了基础集错误.
- 阐明了At-和I-在化物-水相互作用之间的显著差异,包括力场参数和水合能.
- 证明了在重元素模拟中考虑相对论效应的重要性,例如旋转轨道相互作用.
结论:
- 建立了一个框架,用于系统地开发相对论DFT和分子动力学精确力场的基础集.
- 新的基础设施可以对涉及重元素的复杂系统进行大规模模拟,包括活性化物和超重元素.
- 这项工作为改善涉及重元素的核医学和材料科学计算研究铺平了道路.
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