IR Spectroscopy to Probe Structure and Dynamics in Metal Ion Complexes

红外光谱法探测金属离子配合物的结构和动力学

• 批准号: 0244143
• 负责人: Michael Duncan
• 金额: $ 32.84万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0244143&HistoricalAwards=false
• 关键词: IR; Spectroscopy; Probe; Structure; Dynamics

In this project, supported by the Experimental Physical Chemistry Program of the Chemistry Division, Duncan will investigate metal ion-ligand complexes synthesized in a molecular beam via a pulsed laser vaporization source. The ligands are small molecules. The spectroscopy and dynamics of these species are studied using mass-selected infrared laser photodissociation spectroscopy. The experiments measure ligand-based vibrational frequencies as they are shifted by bonding interactions with the metal ion. Cluster solvation shells and intracluster reactions are also identified via ligand vibrations. The experiments focus on magnesium, calcium, aluminum, and silicon ions complexed with one or more solvent or ligand molecules, e.g., carbon dioxide, water, acetylene, and others. Additional experiments include organometallic complexes in which metals interact with benzene or polycyclic aromatic hydrocarbons.The experimental studies on both small and large complexes will contribute to an improved understanding of metal bonding interactions important in inorganic and organometallic complexes, in metal containing atmospheres, in metal materials and at biological metal centers. The research is carried out with graduate and undergraduate students as well as with postdoctoral research associates. The project benefits from collaborations with outside researchers and internationally with a group in the Netherlands.

在这个项目中，在化学部实验物理化学计划的支持下，邓肯将研究通过脉冲激光蒸发源在分子束中合成的金属离子-配体络合物。配体是小分子。用质量选择红外激光光解离光谱研究了这些物种的光谱和动力学。这些实验测量了配体的振动频率，因为它们通过与金属离子的键合作用而移动。团簇溶剂化壳层和簇内反应也可以通过配体振动来识别。实验的重点是镁、钙、铝和硅离子与一个或多个溶剂或配体分子络合，例如二氧化碳、水、乙炔等。其他实验包括金属与苯或多环芳香族碳氢化合物相互作用的有机金属络合物。对小型和大型络合物的实验研究将有助于更好地理解在无机和有机金属络合物、在含金属的气氛中、在金属材料中和在生物金属中心中重要的金属键相互作用。这项研究是在研究生和本科生以及博士后研究助理中进行的。该项目得益于与外部研究人员的合作，以及与荷兰一个国际组织的合作。