Lehmann Carl Stefan, Botros Demian, Weitzel Karl-Michael
Fachbereich Chemie, Philipps-Universität Marburg, 35032 Marburg, Germany.
Phys Chem Chem Phys. 2022 Jul 6;24(26):15904-15911. doi: 10.1039/d2cp01418a.
Here, we report the coincident measurement of PICD and PECD effects in 1-phenylethylamine upon multiphoton ionization. Both photo-ion circular dichroism (PICD) and photo-electron circular dichroism (PECD) are methods to distinguish enantiomers. In PICD, a difference in total ion yields upon multiphoton ionization with circular polarized light is measured, whereas, in PECD, circular dichroism is observed in the angular distribution of the photoelectrons. Here, we report on our continuous effort to measure the PICD and PECD effects in coincidence, simultaneously under the same measurement conditions using a home-built photoion-photoelectron coincidence spectrometer. Pure samples of -(+)-1-phenylethylamine and -(-)-1-phenylethylamine have been photo-ionized using a femtosecond laser operated at 394 nm.
在此，我们报告了在多光子电离作用下对1-苯乙胺中光致电离圆二色性（PICD）和光电子圆二色性（PECD）效应的同时测量。光离子圆二色性（PICD）和光电子圆二色性（PECD）都是区分对映体的方法。在PICD中，测量用圆偏振光进行多光子电离时总离子产率的差异，而在PECD中，在光电子的角分布中观察到圆二色性。在此，我们报告了我们持续的努力，即使用自制的光离子-光电子符合光谱仪，在相同的测量条件下同时对PICD和PECD效应进行符合测量。使用工作在394nm的飞秒激光对纯的(+)-1-苯乙胺和(-)-1-苯乙胺样品进行了光离子化。
