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首页> 外文期刊>Physical chemistry chemical physics: PCCP >A new horizon for vibrational circular dichroism spectroscopy: a challenge for supramolecular chirality
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A new horizon for vibrational circular dichroism spectroscopy: a challenge for supramolecular chirality

机译：振动圆形二色谱的新地平线：超分子手性的挑战

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摘要

Vibrational circular dichroism (VCD) spectroscopy is an extension of circular dichroism spectroscopy into the infrared and near-infrared regions where vibrational transitions occur in the ground electronic state of a molecule. The method offers the advantage of studying the chiroptical properties of a wide range of molecules in non-crystalline states. However, because of the smallness of the signals, one measurement requires several hours to yield reliable results. Accordingly, its targets were limited to a stable molecule in a solution. To overcome this difficulty, our group applied the VCD method to supramolecular systems. The work was launched based on the finding that the VCD signal remarkably enhances when low-molecular mass gelators form gels. By analysing a number of well-resolved VCD peaks, the detailed conformation of a component molecule was deduced. This provided a clue to elucidating the molecular organization in supramolecular architectures. Our final goal was to clarify the route from microscopic molecular chirality to supramolecular chirality. For this purpose, a time-step VCD measurement method was developed for the in situ monitoring of the progress of chirality amplification.
机译：振动圆形二色（VCD）光谱是圆形二色性光谱到红外和近红外区域的延伸，其中在分子的地面电子状态下发生振动过渡。该方法提供了在非晶态中研究各种分子的含量的神经性能的优点。但是，由于信号的小，一个测量需要几个小时以产生可靠的结果。因此，其靶标限于溶液中的稳定分子。为了克服这种困难，我们的小组将VCD方法应用于超分子系统。基于该工作基于发现VCD信号在低分子量胶凝器形成凝胶时显着增强。通过分析许多良好的分辨VCD峰，推导了组分分子的详细构象。这提供了一种阐明超分子架构中的分子组织的线索。我们的最终目标是阐明从微观分子性儿对超分子手性的路线。为此目的，开发了一种时间步骤VCD测量方法，用于对手性扩增进程的原位监测。

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