乙胺单离子与NH的气相反应性:ICP-MS实验与DFT研究相结合
Mathilde Goujet1, Alexandre Quemet1, Dominique Guillaumont1
1CEA, DES, ISEC, DMRC, Univ Montpellier, Bagnols-sur-Cèze, Marcoule 30200, France.
Inorganic chemistry
|October 28, 2024
概括
乙胺单离子与氨气的反应不同,Th +,U +,Np + 和Cm + 显示完全的反应性. 这种由DFT计算解释的反应性差异可以帮助解决诱导合等离子体质谱法 (ICP-MS) 中的干扰.
科学领域:
- 核化学 核化学 核化学
- 计算化学的计算化学
- 分析化学 分析化学
背景情况:
- 动氨酸元素由于其f电子而具有独特的化学特性.
- 在ICP-MS中异构体干扰可能会使动因子的准确量化变得复杂.
- 了解乙化物单离子反应性对于开发新的分析方法至关重要.
研究的目的:
- 为了研究早期的行为性单聚 (Th+,U+,Np+,Pu+,Am+,Cm+) 与氨 (NH3) 的反应性.
- 探索差异性反应的潜力,以解决ICP-MS.中的等离子干扰.
- 通过使用DFT计算,阐明控制动因子单离子-氨相互作用的反应机制和能量因素.
主要方法:
- 使用感应合等离子体质谱仪 (ICP-MS) 反应细胞的实验研究.
- 使用密度函数理论 (DFT) 计算的理论调查.
主要成果:
- Th+,U+,Np+和Cm+单离子与NH3完全反应,形成AnNH+物种.
- +和Am+单离子与NH3具有有限的反应性.
- DFT的计算准确地重现了实验反应率趋势,突出了第一个能量屏障和HAnNH2+中间形成的作用.
- 对+和+的限制步骤的能量不利性归因于高激发能量需求.
结论:
- 对ICP-MS应用而言,观察到的与氨的行为性单离子之间的反应性差异是显著的.
- DFT计算为反应机制和能量障碍提供了有价值的见解.
- 这项研究奠定了利用选择性乙化物-氨反应来缓解同干扰的基础.
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