乙酸电子附着产生氢化物阴离子和乙酰氧自由基的动力学。

IF 3.1 2区化学 Q3 CHEMISTRY, PHYSICAL

Journal of Chemical Physics Pub Date : 2024-10-28 DOI:10.1063/5.0226252

M Hasan, Th Weber, M Centurion, D S Slaughter

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引用次数: 0

摘要

我们通过阴离子碎片动量成像实验研究了低能电子附着到醋酸后形成的瞬态阴离子解离的动力学和位点选择性。6.7 和 7.7 eV 处的共振被证实完全通过 O-H 键解离，而 9.1 eV 处的第三个共振主要通过 C-H 断裂和 O-H 断裂解离。在 10 eV 附近的第四个共振是通过 O-H 断裂解离的。对于每个共振，测得的动能释放表明，在所有四个共振中，二体解离都会产生一个处于基态电子状态的中性自由基。测得的角度分布与所有四个共振的 A'对称性一致。

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Dynamics of hydride anion and acetyloxyl radical production by electron attachment to acetic acid.

We investigate the dynamics and site-selectivity in the dissociation of transient anions formed upon attachment of low energy electrons to acetic acid by anion fragment momentum imaging experiments. The resonances at 6.7 and 7.7 eV are confirmed to dissociate exclusively by the O-H bond, while a third resonance at 9.1 eV dissociates primarily by both C-H break and O-H break. A fourth resonance near 10 eV is found to dissociate by O-H break. For each resonance, the measured kinetic energy release indicates two-body dissociation produces a neutral radical in the ground electronic state, for all four resonances. The measured angular distributions are consistent with all four resonances having A' symmetry.

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来源期刊

Journal of Chemical Physics 物理-物理：原子、分子和化学物理

CiteScore

7.40

自引率

15.90%

发文量

1615

审稿时长

2 months

期刊介绍： The Journal of Chemical Physics publishes quantitative and rigorous science of long-lasting value in methods and applications of chemical physics. The Journal also publishes brief Communications of significant new findings, Perspectives on the latest advances in the field, and Special Topic issues. The Journal focuses on innovative research in experimental and theoretical areas of chemical physics, including spectroscopy, dynamics, kinetics, statistical mechanics, and quantum mechanics. In addition, topical areas such as polymers, soft matter, materials, surfaces/interfaces, and systems of biological relevance are of increasing importance. Topical coverage includes: Theoretical Methods and Algorithms Advanced Experimental Techniques Atoms, Molecules, and Clusters Liquids, Glasses, and Crystals Surfaces, Interfaces, and Materials Polymers and Soft Matter Biological Molecules and Networks.