相关实验视频
Updated: Jun 29, 2025

06:53
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
8.7K
由于异分子电子能量转移而产生的吸附剂解离,由甲薄膜产生的
1Department of Physics, University of Northern BC, Canada. ejensen@unbc.ca.
Physical chemistry chemical physics : PCCP
|April 3, 2024
概括
这项研究揭示了通过电子能量转移在化和薄膜上增强的甲基化物 (CH3I) 光解离. 这种途径与气相解离不同,为表面上的分子碎片化提供了一个新的机制.
科学领域:
- 表面科学和光化学
- 表面上的分子动力学.
- 光谱学和能量转移技术
背景情况:
- 甲基化物 (CH3I) 是研究光解离动力学的关键分子.
- 与气相或散装材料相比,金属基板上的薄膜具有独特的光化学特性.
- 了解能量转移机制对于控制界面上的化学反应至关重要.
研究的目的:
- 为了研究化 (CH3I) 在和薄膜上的近紫外线光解离动力学.
- 阐明电子能量转移在这些表面上CH3I解离中的作用.
- 为了比较解离路径和碎片动能与气相行为和不同的薄膜组成.
主要方法:
- 制备单层 (ML) 到25ML的CH3I薄膜,在一个Cu(100) 基板上生长的甲/甲薄膜上.
- 接近紫外线的光解离实验,使用偏光的落体光.
- 甲基 (CH3) 光片的动能分布的分析.
主要成果:
- 在化和薄膜上观察到增强的CH3I光解离,归因于电子能量转移.
- 对于CH3I在C6H5F,1,4-C6H4F2和C6H6膜上的CH3光片的动能分布有所区别.
- 由于额外的通路,这些薄膜的光解离截面增加,而F数量较高的甲相比.
结论:
- 提出了一种涉及在薄膜内传输到CH3I接口的刺激子的机制,其次是电子刺激转移.
- 金属基板的火效应表明,与直接中性解离相比,这种途径的激发时间尺度较长.
- 甲膜上的解离可能通过CH3I的3Q1兴奋状态进行,基于碎片分布和动能.
相关概念视频
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
6.0K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
6.0K
Molecular Shape and Polarity
60.4K
Dipole Moment of a Molecule
60.4K
Hybridization of Atomic Orbitals I
47.0K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
47.0K
Intermolecular Forces
58.3K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
58.3K
Valence Bond Theory
32.3K
Overview of Valence Bond Theory
32.3K
Molecular Spectroscopy: Absorption and Emission
2.3K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
2.3K

