Exploring Mode Selective Behavior in the Dissociation Dynamics of Vibrationally Excited Molecules

探索振动激发分子解离动力学中的模式选择行为

• 批准号: 9712588
• 负责人: Amitabha Sinha
• 金额: $ 28.5万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-12-15 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9712588&HistoricalAwards=false
• 关键词: Exploring; Mode; Selective; Behavior; Dissociation

The Experimental Physical Chemistry Program supports Amitabha Sinha of The University of California - San Diego in his continuing studies on the influence of initial vibrational state selection on the dissociation dynamics of molecules. Using vibrational overtone-overtone double resonance, he can prepare HOCl in specific rovibrational states on the ground electronic state surface and investigate the expected non-statistical behavior. Photodissociation dynamics of molecules (e.g., CH3I and H2O) occurring on excited electronic states will also be investigated, with the goal to better understand the coupling of vibrational motion with nearly degenerate electronic excited states. The study of chemical reactions and their associated reaction dynamics stands at the forefront of contemporary physical chemistry. The goal of the present study is to understand how various molecular vibrations having similar total energy but corresponding to different intramolecular distribution of the excitation influence chemical reactivity. Measurements in which the excited states are fully resolved yield data which allow detailed comparisons with current theoretical models and promise to provide new insights into the factors that influence selectivity in chemical reactions.

实验物理化学计划支持加州大学圣地亚哥分校的阿米塔巴·辛哈继续研究初始振动状态选择对分子解离动力学的影响。利用振动泛音-泛音双共振，他可以在基电子态表面制备特定振荡态的HOCl，并研究其预期的非统计行为。还将研究分子(例如，CH3I和H2O)在激发电子态上的光解离动力学，目的是更好地理解振动运动与几乎简并的电子激发态的耦合。化学反应及其相关反应动力学的研究处于当代物理化学的前沿。本研究的目的是了解具有相似总能量但对应于不同分子内激发分布的各种分子振动如何影响化学反应活性。完全分辨激发态的测量结果能够与目前的理论模型进行详细的比较，并有望为化学反应中影响选择性的因素提供新的见解。