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

在这个由化学学部实验物理化学项目支持的项目中，Wodtke将发展他的新实验方法，研究量子态特定中性飞行时间（QSSnTOF），同时测量光化学反应产物的内能和平移能。为了证明限制相空间理论（RPST）的有效性，将继续在一些新的光解波长下对烯酮进行研究，该理论是为了适应先前获得的数据而发展起来的。对BH3CO进行了进一步的实验。BH3CO是一种简单的路易斯酸：路易斯碱配合物，具有许多金属羰基的键合特性。QSSnTOF方法将应用于其他物质，如O（单线态D）和NH （X三重态sigma负），以帮助解开臭氧和HNCO光解的通道。光解作用，即分子因吸收光而分解的过程，是最基本的化学过程之一。伍德克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。将结果与理论模型进行分析和比较，以检验其有效性的范围。这类研究具有广泛的影响，特别是在了解地球大气中发生的反应方面，但也涉及在任何地方发生的光化学反应过程，例如在材料的制造或环境降解中。一个吗?¢

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?¢