在氧化反应和非反应性碰撞中,对 Al ((2P) 的旋转轨道状态解析散射的相关性研究
Fangfang Li1, Dong Yan1, Yujie Ma1
1Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai 200438, China.
The journal of physical chemistry. A
|November 8, 2023
概括
(Al) 原子中自旋轨道状态的非反应性散射显示出明显的氧化反应性. 这项研究区分了Al{2P1/2,3/2) 状态,为化学反应动态提供了新的见解.
科学领域:
- 化学物理 化学物理
- 原子和分子物理 原子和分子物理
- 反应动力学 反应动力学
背景情况:
- 旋转轨道合显著影响化学反应,特别是在涉及电子旋转状态变化的反应中.
- 在距离很近的旋转轨道分裂状态之间分析反应动力学提出了实验挑战.
研究的目的:
- 为了研究旋转轨道激发的原子的氧化反应 (Al 2 P1/2,3/2)).
- 为了证明非反应性散射如何为理解化学反应动态提供补充信息.
- 为了区分旋转轨道状态的反应性,具有很小的能量差异 (112 cm-1).
主要方法:
- 使用激光消光交叉光束技术与时间切片离子速度映射相结合.
- 采用国家选定的非反应性散射研究来分析Al2P氧化.
- 在低碰撞能507厘米-1的研究反应,重点是AlO产物 (v=0,1,N).
主要成果:
- 成功区分了Al (P1/2) 和Al (P3/2) 状态的氧化反应.
- 观察到相对反应性 (σ3/2/σ1/2) 随着AlO产品在两种振动状态 (v=0和1) 的旋转水平 (N) 的增加而增加.
- 发现了依赖状态的反应性差异:在高旋转状态下,AlO<2 P3/2) 的反应性比Al<2 P1/2) 低,但在高旋转状态下,对AlO<(v=0) 的反应性更高.
- 对Al的前向散射增强 (P3/2) 与AlO中更高的旋转激发相关.
- 非反应性散射表明Al ((2P3/2) 到Al ((2P1/2) 在横向和向后角度的去兴奋,从而减少了兴奋状态的反应性.
结论:
- 旋转轨道状态的非反应性散射为化学反应动态提供了有价值的,经常被忽视的见解.
- 该研究强调了考虑旋转轨道状态及其反应性能量差异的重要性.
- 使用的实验技术允许在密切相关的电子状态之间清晰地区分反应性.
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