Spectroscopy and Dynamics of Ions

离子的光谱学和动力学

• 批准号: 8819444
• 负责人: William Lineberger
• 金额: $ 117.74万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8819444&HistoricalAwards=false
• 关键词: Spectroscopy; Dynamics; Ions

Professor Carl Lineberger is supported by a grant from The Experimental Physical Chemistry Program to continue his research in the structure and dynamics of ions and ionic clusters. Dr. Lineberger will use state-of-the-art molecular beam, laser spectroscopic, and mass spectroscopic methods to obtain information which is of fundamental importance in the understanding of molecular bonding. Tunable laser photodissociation in a coaxial beam machine will be employed as a probe of the vibrational spectra of ionic complexes and the rate of energy coupling between an ionic chromophore and the weak ion-cluster bond. A supersonic expansion ion source connected to the coaxial beam machine will enable the production of moderate-sized cluster ions, whose infrared dissociation will be probed in high resolution. Other experiments will expand our experimental knowledge of dipole bound states of negative ions by observing unstable molecules via their presumed dipole bound states. Ultraviolet photoelectron spectroscopy will be used to study a number of organic diradicals, as well as to investigate the electronic structure of neutral metal clusters. In addition, evaporative loss of monomers from cluster ions following photoabsorption will be used to obtain low resolution infrared absorption spectra of mass-selected cluster ions.

卡尔·莱恩伯格教授得到了实验物理化学计划的资助，继续他在离子和离子团簇的结构和动力学方面的研究。Lineberger博士将使用最先进的分子束、激光光谱和质谱学方法来获取对理解分子成键至关重要的信息。可调谐激光光解离将被用来探测离子络合物的振动光谱和离子生色团与弱离子团簇键之间的能量耦合速率。连接到同轴束流机的超音速膨胀离子源将能够产生中等大小的团簇离子，其红外解离将以高分辨率进行探测。其他实验将通过观察不稳定分子假定的偶极束缚态来扩展我们对负离子偶极束缚态的实验知识。紫外光电子能谱将被用来研究一些有机双自由基，以及中性金属团簇的电子结构。此外，团簇离子的单体在光吸收后的蒸发损失将被用于获得质量选择的团簇离子的低分辨率红外吸收光谱。