Quantum-State-Specific Neutral Time-of Flight: A New Probe of the Correlated Product Energy Distribution in Photodissociation

量子态特定中性飞行时间：光解相关产物能量分布的新探针

• 批准号: 9726267
• 负责人: Alec Wodtke
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-01 至 2000-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726267&HistoricalAwards=false
• 关键词: Quantum; State; Specific; Neutral; Time

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Wodtke will develop his new experimental method, studying quantum-state specific neutral time-of-flight (QSSnTOF), to measure simultaneously the internal and translational energy of photochemical reaction products. Work on ketene will be continued at a number of new photolysis wavelengths in order to show the validity of Restricted Phase Space Theory (RPST), which had been developed to fit the previously acquired data. Additional experiments are proposed on BH3CO, a simple Lewis acid:Lewis base complex that exhibits many bonding characteristics of metal carbonyls. The QSSnTOF method will be applied to other species, such as O (singlet D) and NH (X triplet sigma minus) in order to help unravel channels in ozone and HNCO photolysis. %%% Photodissociation, the process in which molecules fall apart as a result of absorbing light, is one of the most basic of chemical processes. These studies of Prof. Wodtke will examine in a very detailed way what happens to the fragments of molecules which dissociate after absorbing light. The results will be analyzed and compared with theoretical models in order to test the ranges of their validity. Such studies have wide-ranging impact, particularly in understanding reactions occurring in the earth's atmosphere, but also on such processes as take place in photochemical reactions anywhere, such as in the manufacturing or environmental degradation of materials. Á?¢

在这个由化学系实验物理化学项目支持的项目中，Wodtke将开发他的新实验方法，研究量子态特定的中性飞行时间（QSSnTOF），以同时测量光化学反应产物的内能和平动能。将在若干新的光解波长下继续开展关于乙烯酮的工作，以表明为拟合先前获得的数据而开发的受限相空间理论的有效性。对BH 3 CO，一个简单的刘易斯酸：刘易斯碱络合物，表现出许多金属羰基化合物的键合特性，提出了额外的实验。QSSnTOF方法将应用于其他物种，如O（单线态D）和NH（X三线态sigma minus），以帮助解开臭氧和HNCO光解的通道。光解，即分子由于吸收光而分解的过程，是最基本的化学过程之一。Wodtke教授的这些研究将以非常详细的方式检查吸收光后解离的分子碎片发生了什么。将对结果进行分析并与理论模型进行比较，以测试其有效性范围。这些研究具有广泛的影响，特别是在理解地球大气中发生的反应方面，而且也对任何地方发生的光化学反应过程产生影响，例如材料的制造或环境降解。你说呢？¢