Liquid Microjet Studies of Collisions and Reactions at the Surfaces of Aqueous Solutions

水溶液表面碰撞和反应的液体微射流研究

• 批准号: 1152737
• 负责人: Gilbert Nathanson
• 金额: $ 50.55万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1152737&HistoricalAwards=false
• 关键词: Liquid; Microjet; Studies; Collisions; Reactions

In this project, funded by the Chemical Structure, Dynamics, and Mechanisms Program of the Chemistry Division, Prof. Gilbert Nathanson of the University of Wisconsin-Madison will couple liquid microjets with molecular beams to explore collisions and reactions at the surfaces of volatile aqueous solutions. These gas-liquid scattering experiments will be performed by directing a beam of atoms or molecules at the surface of a liquid jet in vacuum and monitoring the identities, energies, and reaction times of the products with a mass spectrometer. Liquid microjets are narrower than a human hair and are surrounded by only a thin vapor blanket, permitting scattering experiments to be carried out using pure, basic, and salty water solutions with vapor pressures up to several Torr. The proposed research is dedicated to learning how acidic gases such as DCl and oxidizing gases such as F2 react with water molecules and ions at or near the surface. The long term objective is to develop a molecular picture of gas-water reactions by exploring the interfacial analogs of bulk solvation, the "like dissolves like" rule, proton transfer, acid dissociation, and oxidation-reduction.This program benefits society through its research, mentoring, and outreach activities. Scientifically, this program will help reveal the ways in which gases and aqueous solutions react industrially and in the environment. It will concurrently provide a setting to mentor graduate and undergraduate students from a wide range of backgrounds. The familiarity gained in this research will further be used to improve General Chemistry classes on aqueous chemistry and to engage K-12 students and their parents through hands-on surface chemistry workshops.

在这个项目中，由化学部的化学结构，动力学和机制计划资助，威斯康星大学麦迪逊分校的吉尔伯特·内桑森教授将液体微射流与分子束耦合，以探索挥发性水溶液表面的碰撞和反应。 这些气体-液体散射实验将通过在真空中的液体射流表面引导原子或分子束并使用质谱仪监测产物的身份，能量和反应时间来进行。 液体微射流比人的头发更窄，并且仅被薄的蒸汽毯包围，允许使用蒸汽压高达几托的纯水、碱性水和盐水溶液进行散射实验。 拟议的研究致力于了解酸性气体如DCl和氧化气体如F2如何与表面或附近的水分子和离子反应。 长期目标是通过探索本体溶剂化的界面类似物，“相似溶解相似”规则，质子转移，酸解离和氧化还原来发展气水反应的分子图像。该计划通过其研究，指导和推广活动造福社会。 科学上，该计划将有助于揭示气体和水溶液在工业和环境中反应的方式。 它将同时提供一个设置，以指导来自广泛背景的研究生和本科生。 在这项研究中获得的熟悉程度将进一步用于改善水化学的普通化学课程，并通过动手表面化学研讨会吸引K-12学生及其家长。