University of Houston Clear Lake, 2700 Bay Area Blvd., Houston, TX, 77059, USA.
Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA.
J Chromatogr A. 2018 Oct 26;1573:1-17. doi: 10.1016/j.chroma.2018.08.041. Epub 2018 Aug 30.
The use of the electron-capture detector, ECD, to measure molecular electron affinities and kinetic parameters for reactions of thermal electrons with molecules at atmospheric pressure separated by chromatography and the sensitive and selective quantitative analysis of certain classes molecules are reviewed. The evaluated ground state electron affinities of the main group elements and diatomic molecules from slightly positive, 0+, to 3.6 eV are summarized. The electron affinities of twenty-seven superoxide states determined from pulsed discharge ECD and other methods are used to calculate one dimensional potential energy curves in agreement with theory. Advances in literature searches have uncovered ECD data in dissertations and theses and in the Russian and Japanese literature. These data, unpublished radioactive and pulsed discharge ECD thermal data from the University of Houston laboratories are used to report and evaluate electron affinities. The accuracy and precision of ECD electron affinities of organic molecules are identified and tabulated so that they can be added to compilations. A procedure for calculating the temperature dependence of electron molecule reactions is presented using kinetic and thermodynamic data. These are used toselect the most appropriate equipment and conditions for ECD analyses and physical determinations.
本文综述了电子俘获检测器（ECD）在常压下通过色谱分离测量分子电子亲和能和热电子与分子反应的动力学参数，以及某些类分子的灵敏和选择性定量分析的应用。总结了主族元素和双原子分子的基态电子亲和能，范围从稍正的 0+到 3.6eV。利用从脉冲放电 ECD 和其他方法确定的二十七个超氧化物态的电子亲和能来计算与理论一致的一维势能曲线。文献检索的进展揭示了 ECD 数据在论文和博士论文中，以及俄罗斯和日本文献中的存在。这些数据，包括休斯顿大学实验室未发表的放射性和脉冲放电 ECD 热数据，用于报告和评估电子亲和能。ECD 有机分子电子亲和能的准确性和精密度已被确定并制表，以便将其添加到编目中。使用动力学和热力学数据提出了计算电子-分子反应温度依赖性的程序。这些程序用于选择最适合 ECD 分析和物理测定的设备和条件。
