Threshold Photoelectron Photoion Coincidence (TPEPICO) Studies. The Road to ?? 0.1 kJ/mol Thermochemistry

[摘要] The threshold photoelectron photoion coincidence (TPEPICO) technique is utilized to investigate the dissociation dynamics and thermochemistry of energy selected medium to large organic molecular ions. The reactions include parallel and consecutive steps that are modeled with the statistical theory in order to extract dissociation onsets for multiple dissociation paths. These studies are carried out with the aid of molecular orbital calculations of both ions and the transition states connecting the ion structure to their products. The results of these investigations yield accurate heats of formation of ions, free radicals, and stable molecules. In addition, they provide information about the potential energy surface that governs the dissociation process. Isomerization reactions prior to dissociation are readily inferred from the TPEPICO data.

[发布日期] 2013-10-14

[学科分类] 化学（综合）

[关键词] free radicals;thermochemistry;photoionization