Thermochemistry of Metal Ligand Bonds

金属配体键的热化学

• 批准号: 9530412
• 负责人: Peter Armentrout
• 金额: $ 55.7万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-03-15 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9530412&HistoricalAwards=false
• 关键词: Thermochemistry; Metal; Ligand; Bonds

In this project in the Physical Chemistry Program of the Chemistry Division, Armentrout will continue work studying the gas-phase dynamics and chemistry of organometallic ions, especially second- and third-row transition metals, reacting with atomic ions. The main outputs of these investigations are bond energies between the metals and various ligands, such as hydrogen, oxygen, and carbon. An extensive part of the proposed work will examine the effects of sequential ligation on the thermochemistry and reactivity of metal centers. Flowing afterglow ion production and guided ion-beam mass spectrometry will be used to obtain kinetic and thermodynamic data. Better correlations between gas-phase studies and condensed-phase organometallic and catalytic reactions should result from these experiments. By studying reactions involving electrically charged molecules containing transition metal atoms, Armentrout can determine many properties of the corresponding neutral species, such as the strength of bonds between these atoms and attached units called ligands. Such information is useful for understanding many processes, such as condensed-phase and catalytic reactions on surfaces as well as metal interactions with nucleic acids, which are significant in DNA replication, transcription, and messenger RNA translation.

在化学部物理化学项目的这个项目中，Armentrout 将继续研究有机金属离子（特别是第二和第三行过渡金属）与原子离子反应的气相动力学和化学。 这些研究的主要成果是金属与各种配体（例如氢、氧和碳）之间的键能。 拟议工作的大部分内容将研究连续连接对金属中心的热化学和反应性的影响。 将使用流动余辉离子产生和引导离子束质谱来获得动力学和热力学数据。 这些实验应该可以使气相研究与凝聚相有机金属和催化反应之间有更好的相关性。 通过研究涉及含有过渡金属原子的带电分子的反应，Armentrout 可以确定相应中性物质的许多特性，例如这些原子和称为配体的附着单元之间的键强度。 这些信息对于理解许多过程非常有用，例如表面上的凝聚相和催化反应以及金属与核酸的相互作用，这些在 DNA 复制、转录和信使 RNA 翻译中具有重要意义。