将内部坐标插值纳入结字符串方法中
1Department of Chemical and Biochemical Engineering University of Iowa, Iowa City, Iowa 52242, United States.
Journal of chemical theory and computation
|November 22, 2025
概括
本研究介绍了一种增强的结串法 (FSM),用于在化学反应中找到过渡状态. 改进的FSM显著降低了近50%的计算成本,同时实现了100%的成功率.
科学领域:
- 计算化学的计算化学
- 化学反应动力学 化学反应动力学
背景情况:
- 准确地确定过渡状态对于理解化学反应机制至关重要.
- 对于过渡状态搜索生成初始猜测的现有方法可能在计算上昂贵,并且可能在复杂的系统中失败.
研究的目的:
- 开发和验证一个改进的结串法 (FSM) 以实现更可靠和更有效的过渡状态 (TS) 搜索.
- 为了降低与过渡状态计算相关的计算成本.
主要方法:
- 将内部坐标插值纳入结串法 (FSM).
- 在三个基准数据集中对40多种不同的化学反应进行了增强的FSM测试.
- 与使用线性同步运输 (LST) 插值的方法进行比较.
主要成果:
- 改进后的FSM显示出更高的可靠性,并允许更大的插值步骤大小.
- 由于每个周期的优化步骤较少,计算成本减少了近50%.
- 在基准化学反应试验案例中保持了100%的成功率,包括LST失败的挑战性系统.
结论:
- 内部坐标插值显著提高了FSM在过渡状态搜索中的性能和效率.
- 开发的方法为探索反应途径提供了一个强大的,在计算上更便宜的替代方案.
- 为社区使用提供了FSM的开源Python实现和相关数据.
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