Mass spectrometry - Not just a structural tool: The use of guided ion beam tandem mass spectrometry to determine thermochemistry
Mass spectrometry - Not just a structural tool: The use of guided ion beam tandem mass spectrometry to determine thermochemistry
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DOI：
10.1016/s1044-0305(02)00347-1
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发表时间：
2002-05-01
影响因子：
3.2
通讯作者：
Armentrout, PB
中科院分区：
文献类型：
--
作者：
Armentrout, PB
导离子束串联质谱法已被证明是测量热力学信息的有力工具。在过去的二十年里，我们已经阐明了使这种热化学准确的一些必要因素。必须仔细注意将原始数据，离子强度与实验室离子能量，还原为更有用的形式，反应截面与相对动能。分析吸热反应截面的动能依赖性可以揭示双分子和碰撞诱导解离（CID）过程的热力学数据。这种分析需要考虑反应物的显式动力学和内能分布、多次碰撞的影响、CID过程中碰撞伙伴的身份、所研究反应的动力学以及平行反应之间的竞争。这项工作提供了一些例子，说明需要考虑这些众多的影响，以及我们小组为处理每个影响而开发的程序的细节。[J] .质谱分析，2002,13 (3):419-434 (C) 2002美国质谱学会。
Guided ion beam tandem mass spectrometry has proved to be a robust tool for the measurement of thermodynamic information. Over the past twenty years, we have elucidated a number of factors necessary to make such thermochemistry accurate. Careful attention must be paid to the reduction of the raw data, ion intensities versus laboratory ion energies, to a more useful form, reaction cross sections versus relative kinetic energy. Analysis of the kinetic energy dependence of cross sections for endothermic reactions can then reveal thermodynamic data for both bimolecular and collision-induced dissociation (CID) processes. Such analyses need to include consideration of the explicit kinetic and internal energy distributions of the reactants, the effects of multiple collisions, the identity of the collision partner in CID processes, the kinetics of the reaction being studied, and competition between parallel reactions. This work provides examples illustrating the need to consider this multitude of effects along with details of the procedures developed in our group for handling each of them. (J Am Soc Mass Spectrom 2002, 13, 419-434) (C) 2002 American Society for Mass Spectrometry.