在分子晶体CD3+ + CD3I --> C2D5+ + DI表面上与表面对齐的离子分子反应
1Contribution from the Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
Journal of the American Chemical Society
|October 8, 2004
概括
电子刺激的CD(3) I晶体脱离反应显示出一种高产率的离子分子反应. CD(3) I晶体的分子顺序决定了产物离子产量和辐射方向.
科学领域:
- 表面科学是一门科学.
- 化学物理 化学物理
- 材料科学是一种材料科学.
背景情况:
- 离子-分子反应是化学中的基本过程.
- 了解表面上的这些反应对于催化和材料改造至关重要.
- 凝结的分子晶体为研究表面反应提供了独特的环境.
研究的目的:
- 为了研究一个离子-分子反应在一个凝聚的分子晶体的CD(3) I.I.内.
- 为了描述产物离子形成的溶解动态.
- 为了确定分子序列对反应产量和离子排放的影响.
主要方法:
- 飞行时间电子刺激溶解离子角分布 (TOF-ESDIAD) 技术.
- 在基板上,有序的CD(3) I多层晶体的生长.
- 使用间隔层 (H(2) O) 控制分子顺序的修改.
主要成果:
- 观察到CD{3}{+}和CD{3}{I}之间的高截面离子分子反应,形成C{2}{D}{5}{+}) 离子.
- 产物离子动量主要由反应物离子动量控制,表明两体碰撞.
- 在CD(3) I晶体中的分子顺序显著影响C(2) D(5) 产量和发射方向性.
- 使用H(2) O破坏分子秩序,降低了C(2) D(5) +) 产量和扩大了离子排放.
结论:
- 该研究表明,在凝结的CD(3) I.I.中发生了表面介导的离子分子反应.
- 晶体中的分子排序在控制反应结果方面发挥着关键作用.
- TOF-ESDIAD在探测反应动态和表面结构效应方面是有效的.
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