Controlled enantiomeric transformation with femtosecond laser pulses (B04)

这个项目研究单个分子从一个对映体到另一个对映体的转化。因此，我们利用短激光脉冲激发分子产生的手性修改波包。在首次观测到分子基态中的这种波包之后，我们将把研究扩展到具有非手征几何的激发态中的波包。之后，目标是阻止波包，使分子的手性发生变化。从长远来看，这种转变是在其方向上变得有选择性，即人们可以用它来将外消旋体变成对映体样品。

This project studies the transformation of an individual molecule from one enantiomer to the other. Thereby, we exploit chirality-modifying wave packets that are created by excitation of the molecule with a short laser pulse. After the first observation of such wave packets in the molecular ground state, we will expand the studies to wave packets in excited states with achiral geometry. Afterwards, the goal is to stop the wave packets in such a way that the chirality of the molecule has changed. On the long term, the transformation is to become selective on its direction, i.e., one could use it to change a racemate into an enantiopure sample.