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

在化学部实验物理化学计划的支持下，沃特克将开发他的新实验方法--研究量子态特定中性飞行时间(QSSnTOF)，以同时测量光化学反应产物的内能和平动能。为了证明限制相空间理论(RPST)的有效性，将在一些新的光解波长上继续对乙烯酮的研究，该理论是为拟合先前获得的数据而开发的。此外，还建议对BH3CO进行其他实验，这是一种简单的Lewis酸：Lewis碱络合物，显示出许多金属羰基的成键特征。QSSnTOF方法将应用于其他物种，如O(单重态D)和NH(X三重态西格玛负)，以帮助解开臭氧和HNCO光解中的通道。光解是分子由于吸收光而解体的过程，是最基本的化学过程之一。沃特克教授的这些研究将非常详细地检验吸收光后解离的分子碎片会发生什么。结果将被分析，并与理论模型进行比较，以检验它们的有效范围。这类研究具有广泛的影响，特别是在了解地球大气层中发生的反应方面，但也对任何地方的光化学反应中发生的过程，如材料的制造或环境退化。？？？

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?¢