配体与重构 Au(111) 表面结合的空间位阻效应的分子尺度可视化
Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces
AI总结：
本研究利用 STM 与 IETS，并结合理论计算，在单分子精度上揭示重构 Au(111) 表面位点依赖的空间位阻压力如何调控间三联苯异腈的振动指纹、结合选择性及化学性质。
摘要：
在纳米结构界面上对单个分子进行直接成像是一项重大挑战，但它有望催生新型、精确的材料架构与技术。其中尤其受关注的是吸附分子的结构形态和光谱特征；目前，具备必要空间与能量分辨率、能够提供分子—表面界面详细信息的现代探测手段才刚刚发展起来。在此，我们通过扫描隧道显微镜（STM）和非弹性电子隧穿谱（IETS），直接可视化了单个间三联苯异腈（m-terphenyl isocyanide）配体与重构 Au(111) 表面的结合。不同表面特征所产生的随位点变化的空间位阻压力会改变间三联苯异腈的振动指纹；我们结合实验与理论方法，以单分子精度对其进行了表征。本研究首次在分子层面揭示了由空间位阻压力促成的表面结合选择性，以及其对单个表面结合配体化学性质的影响。
英文摘要：
Direct imaging of single molecules at nanostructured interfaces is a grand challenge, with potential to enable new, precise material architectures and technologies. Of particular interest are the structural morphology and spectroscopic signatures of the adsorbed molecule, where modern probes are only now being developed with the necessary spatial and energetic resolution to provide detailed information at molecule-surface interface. Here, we directly visualize the binding of individual m-terphenyl isocyanide ligands to a reconstructed Au(111) surface through scanning tunneling microscopy (STM) and inelastic electron tunneling spectroscopy (IETS). The site-dependent steric pressure of the various surface features alters the vibrational fingerprints of the m-terphenyl isocyanides, which is characterized with single-molecule precision through joint experimental and theoretical approaches. This study for the first time provides molecular-level insights into the steric-pressure-enabled surface binding selectivity, as well as its effect on the chemical properties of individual surface-binding ligands.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
