对于债券解离能量的值碰撞诱导解离模拟的稳定性
Eno Paenurk1,2, Peter Chen1
1Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich 8093, Switzerland.
The journal of physical chemistry. A
|December 29, 2023
概括
值碰撞诱导解离 (T-CID) 方法提供可靠的气相键解离能 (BDE) 测量. 模拟表明,BDE值是稳定的,即使有故意的错误,证实实验数据的准确性.
科学领域:
- 分析化学 分析化学
- 物理化学 物理化学
- 计算化学计算化学
背景情况:
- 值碰撞诱导解离 (T-CID) 是确定气相键解离能量的主要方法.
- 通过将实验数据与模拟结果相匹配,T-CID间接测量BDE,需要对模拟参数进行验证.
- 之前的工作发现了计算和实验BDE之间的差异,促使进一步调查模拟可靠性.
研究的目的:
- 评估在T-CID分析中使用的L-CID (联结体CID) 程序中的碰撞模拟组件的可靠性.
- 为了确定碰撞模拟中的变化和错误对衍生的BDE值准确性的影响.
主要方法:
- 对L-CID程序的碰撞模拟模块进行系统评估.
- 在模拟参数中引入故意错误以测试可靠性.
- 分析不同碰撞能量转移 (CET) 模型对BDE计算的影响.
主要成果:
- 来自T-CID模拟的BDE值显示出高稳定性,大多数故意的模拟错误导致变化低于3kcal mol-1.1.
- 碰撞能量转移 (CET) 模拟被确定为一个敏感的参数,可能导致超过10kcalmol-1.1的偏差.
- 与原始模型相比,明确模拟CET分布导致BDE偏差仅为~3kcal mol-1.
结论:
- 通过T-CID方法,可以获得可靠且准确的气相键解离能 (BDE) 值.
- 在L-CID程序中的模拟参数通常是可靠的BDE确定.
- 虽然CET模拟需要仔细考虑,但它对BDE整体准确性的影响是可以管理的.
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