Vibrational Dynamics in Weakly-Bound Complexes and Gas- Surface Scattering

弱结合配合物的振动动力学和气体表面散射

• 批准号: 9318936
• 负责人: Roger Miller
• 金额: $ 51.36万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-02-01 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9318936&HistoricalAwards=false
• 关键词: Vibrational; Dynamics; Weakly; Bound; Complexes

In this project in the Experimental Physical Chemistry program of the Chemistry Division, Prof. R.E. Miller of the University of North Carolina at Chapel Hill will continue a research program on problems of the dynamics of energy transfer, specifically those present in weakly bound molecular complexes and in molecule-surface interactions. For the weakly bound complexes there will be spectroscopic characterization to determine the details of photodissociation dynamics and the associated potential energy surfaces, as well as the state-to-state probing of the fragments resulting from phtodissociation. These experiments are extended into the realm of gas-surface scattering, especially that of scattering of non-linear molecules and the vibrational and rotational energies transferred in this process. The dynamics of chemical reactions stands at the forefront of contemporary research in physical chemistry. The purpose is to obtain a detailed understanding of reaction processes at the molecular level. Systems that are investigated include stable molecules, weakly bound complexes composed of stable molecules, and molecules interacting with solid surfaces in a scattering process. Gas phase molecules or complexes elevated to high electronic, vibrational or rotational states of energy by photoexcitation often dissociate into fragments having characteristic energy distributions in the electronic, vibrational, rotational, and translational degrees of freedom. Since there are usually several possible paths along which a dissociation process is allowed to occur, it is important to understand the details of these processes to allow correct modeling of the overall reaction phenomenon. Similar reasons guide the research in scattering of molecules by solid surfaces, especially those that play a role in catalytic reactions.

在这个项目中的实验物理化学计划的 化学部，RE教授北卡罗来纳州大学的米勒说， 在查佩尔山将继续研究计划的问题， 能量转移的动力学，特别是那些存在于弱结合的 分子复合物和分子-表面相互作用。 为弱者 结合复合物将有光谱表征，以确定 详细的光解动力学和相关的潜力 能量表面，以及碎片的状态到状态探测 由光离解产生的。 这些实验被扩展到 气体表面散射领域，尤其是 非线性分子的振动能和转动能 在这个过程中转移。 化学反应的动力学处于 当代物理化学研究。目的是为了获得一个 在分子水平上详细了解反应过程。 所研究的系统包括稳定的分子，弱结合的分子， 由稳定分子和与之相互作用的分子组成的复合物 在散射过程中的固体表面。 气相分子或复合物 提升到高电子、振动或转动能量状态 通过光激发通常解离成具有特征性的碎片， 在电子，振动，转动， 平移自由度。 由于通常有几个 可能的路径沿着，解离过程被允许发生， 重要的是要了解这些过程的细节， 对整个反应现象的正确建模。 类似的原因 指导固体表面对分子散射的研究， 特别是那些在催化反应中起作用的。