Femtosecond - Coincidence Studies of Molecular Chirality

在这个项目中，分子手性的研究将在圆偏振光的激光电离框架内进行。更具体地说，光离产率的圆二色性（PICD）以及光电子圆二色性（PECD）将作为选择的目标分子（柠檬烯，甘油三酯和3-甲基环戊酮）在UV/VIS中的波长和作为激光脉冲的光谱相位的函数进行研究。最终，这两个实验将结合在一个高重复频率的光纤激光器系统的光电子-光子-符合实验（PEPICO_CD）中。该项目旨在解决目前PICD和PECD研究之间存在的明显差异。通过光电子-光子-重合实验，我们将阐明基于不同选择规则的PICD和PECD两种效应是简单相加还是相互依赖。本文的研究结果将有助于提高激光电离质谱法在化学分析中手性性质研究中的应用。

Within this project studies of molecular chirality will be performed within the frame of fs-laser ionization employing circularly polarized light. More specifically the circular dichroism in photoionization yields (PICD) as well as the photoelectron circular dichroism (PECD) will be investigated for selected target molecules (limonene, glycidol and 3-methylcyclopentanone) as a function of the wavelength in the UV/VIS and as the function of the spectral phase of the laser pulses. Ultimately these two experiments will be combined in photoelectron-photoion-coincidence experiment (PEPICO_CD) employing a high-repetition fs-laser system.The project aims at resolving apparent discrepancies existing between current PICD and PECD studies. By performing a photoelectron-photoion-coincidence experiment we will elucidate whether the two effects PICD and PECD, which are based on different selection rules, are simply additive or depend on each other. We expect that the results of this research will contribute to improving future applications of fs-laser ionization mass spectrometry in the investigation of chirality properties in chemical analysis.