在没有光线的情况下,臭氧可以在水表面 (水滴和冰) 解离吗?
1Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, 302017,India.
The journal of physical chemistry. A
|November 15, 2023
概括
在没有光线的情况下,臭氧可以在冰和水面上分解,形成基基. 这种表面诱导的解离在冰上更快,并且昼夜都会发生,可能会增加大气氧化.
科学领域:
- 大气化学 大气化学
- 表面科学是一门学科.
- 环境科学 环境科学
背景情况:
- 臭氧 (O3) 是一个重要的热层氧化剂,主要通过光解离产生基 (OH) 基.
- 了解OH基形成途径对于大气化学和空气质量研究至关重要.
研究的目的:
- 研究臭氧在水滴和冰面上的非光解解离.
- 为了比较不同大气表面的臭氧解离率.
- 为了评估表面介导臭氧反应在热层化学中的意义.
主要方法:
- 使用波恩-奥本海默分子动力学模拟.
- 在模拟水滴和冰面上建模臭氧相互作用和解离.
主要成果:
- 在水滴和冰面上,臭氧分离发生在不需要光线的情况下.
- 与水滴表面相比,冰面上的臭氧解离速度明显更快.
- 通过表面介导的臭氧解离可以持续发生,而不管白天的光周期.
结论:
- 表面诱导的臭氧解离是热层中OH基形成的重要途径.
- 云和冰面可以大大提高大气的氧化能力.
- 这种机制可能比光解离对OH基的产生更重要,尤其是在夜间.
更多相关视频
08:48Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
8.3K
06:08Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
8.9K
相关概念视频
Oxidative Cleavage of Alkenes: Ozonolysis
10.5K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.5K
Radical Formation: Homolysis
3.6K
A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.
3.6K
Hess's Law
45.2K
There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.
45.2K
Phase Transitions: Sublimation and Deposition
17.2K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.2K
Intermolecular Forces
58.5K
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...
58.5K
Aqueous Solutions and Heats of Hydration
14.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.7K
