Time-resolved 2D-IR-spectroscopy at adsorbate layers (C04)

本文用时间和频率分辨泵浦探测光谱研究了选择性振动激发吸附单分子膜的时间演化。这使我们能够直接观察模式链及其分支，这些模式随时间的变化而变化。这种方法提供了详细的见解振动模式的耦合。对不同长度的烷基和多烯分子的研究使我们能够观察到多余能量沿链沿着的传播。不同堆积密度的Langmuir-Blodget薄膜详细描述了分子间相互作用对振动动力学的影响。

The temporal evolution in selectively vibrationally excited adsorbat monolayers is studied using time and frequency resolved pump-probe-spectroscopy. This allows us to directly observe the chain of modes and their branching which are populated with evolving time. This approach provides detailed insights into the coupling of vibrational modes. Studies with alkyl- and polyen-molecules of different lengths allow us to observe the propagation of the excess energy along the chains. Langmuir-Blodget films of different packing density detail the influence of intermolecular interactions on the vibrational dynamics.