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首页> 外文期刊>Chemistry: A European journal >A foldamer at the liquid/graphite interface: The effect of interfacial interactions, solvent, concentration, and temperature
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A foldamer at the liquid/graphite interface: The effect of interfacial interactions, solvent, concentration, and temperature

机译：液体/石墨界面的折叠剂：界面相互作用，溶剂，浓度和温度的影响

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摘要

The unfolding process and self-assembly of a foldable oligomer (foldamer 1) at the liquid/graphite interface were investigated by scanning tunnelling microscopy. At the level of molecular conformation, we identified several molecular conformations (A_z, B, C, D, E) that represent intermediate states during unfolding, which may help to elucidate the unfolding process at the liquid/graphite interface. Adsorption at the interface traps the intermediate states of the unfolding process, and STM has proved to be a powerful technique for investigating folding and unfolding of a foldamer at the molecular level, which are not accessible by other methods. The STM observations also revealed that varying the solvent and/or concentration results in different self-assemblies of foldamer 1 as a result of variations in molecular conformations. The solvent and concentration effects were attributed to the changes in existing states (extended or folded) of foldamers in solution, which in turn affect the distribution of adsorbed molecular conformations at the interface. This mechanism is quite different from other systems in which solvent and concentration effects were also observed.
机译：通过扫描隧道显微镜研究了可折叠低聚物（折叠剂1）在液体/石墨界面的展开过程和自组装。在分子构象水平上，我们鉴定了几种分子构象（A_z，B，C，D，E），它们代表展开过程中的中间状态，这可能有助于阐明液体/石墨界面的展开过程。界面处的吸附捕获了展开过程的中间状态，并且STM已被证明是一种在分子水平上研究折叠剂折叠和展开的强大技术，而其他方法则无法实现。 STM的观察结果还表明，由于分子构象的变化，改变溶剂和/或浓度会导致折叠剂1的不同自组装。溶剂和浓度的影响归因于溶液中折叠剂的现有状态（扩展或折叠）的变化，这反过来又影响了界面上吸附分子构象的分布。此机制与其他系统中也观察到溶剂和浓度影响的方法完全不同。

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