Vibrational Energy Flow in Liquids and on Surfaces

液体和表面上的振动能量流

• 批准号: 8814717
• 负责人: George Ewing
• 金额: $ 47.25万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-01 至 1992-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814717&HistoricalAwards=false
• 关键词: Vibrational; Energy; Flow; Liquids; Surfaces

Dr. George Ewing is supported by a grant from The Experimental Physical Chemistry Program to study the flow of vibrational energy in liquids and on surfaces. This basic research program will contribute substantially to our understanding of vibrational energy storage in molecules contained in solution and adsorbed on surfaces. Dr. Ewing has demonstrated that energy can be stored in high vibrational levels of molecules dissolved in cryogenic liquids. Most recently he has also shown that molecules which have been pumped into these high levels can undergo chemical reactions. He will continue to explore the properties of these high energy liquid systems which may serve as laser media and which also exhibit vibrational to electronic energy transfer. In a second quite distinct research effort, Dr. Ewing is studying the fate of vibrational energy in molecules adsorbed on alkali halide surfaces. Three properties are being investigated: 1) the vibrational relaxation rate of adsorbed molecules; 2) vibrational predissociation which results when absorbed infrared energy exceeds the physisorbed surface bond strength; and 3) fluorescence from the vibrationally excited adsorbed molecule.

乔治·尤因博士得到了实验物理化学计划的资助，该计划研究液体和表面上的振动能量流动。这一基础研究计划将大大有助于我们理解溶液中和吸附在表面上的分子中的振动能量存储。尤因博士已经证明，能量可以储存在溶解在低温液体中的高振动水平的分子中。最近，他还证明了被注入如此高水平的分子可以发生化学反应。他将继续探索这些高能液体系统的特性，这些系统可以用作激光介质，也可以显示出从振动到电子的能量转移。在另一项截然不同的研究中，尤因博士正在研究吸附在碱卤化物表面的分子中振动能量的命运。研究了三种性质：1)吸附分子的振动弛豫速率；2)当吸收的红外能量超过物理吸附表面键合强度时产生的振动预解离；3)振动激发的吸附分子的荧光。