Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces
Molecular-Scale Visualization of Steric Effects of Ligand Binding to Reconstructed Au(111) Surfaces
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DOI：
10.1021/jacs.4c00002
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发表时间：
2024-04-16
影响因子：
15
通讯作者：
Li，Shaowei
中科院分区：
文献类型：
--
作者：
Bi，Liya;Jamnuch，Sasawat;Li，Shaowei
单分子在纳米结构界面的直接成像是一个巨大的挑战，有可能使新的，精确的材料结构和技术。特别感兴趣的是结构形态和光谱特征的吸附分子，现代探针现在才被开发出必要的空间和能量分辨率，以提供详细的信息，在分子表面界面。在这里，我们通过扫描隧道显微镜和非弹性电子隧道光谱直接表征了单个间三联苯异腈配体在重构Au（111）表面上的吸附。站点依赖的空间压力的各种表面功能改变的振动指纹的them-terphenyl异腈，其特征在于通过联合实验和理论方法与单分子精度。这项研究提供了分子水平的见解空间压力使表面结合的选择性，以及其对单个表面结合配体的化学性质的影响。
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 the molecule–surface interface. Here, we directly characterize the adsorption of individualm-terphenyl isocyanide ligands on a reconstructed Au(111) surface through scanning tunneling microscopy and inelastic electron tunneling spectroscopy. The site-dependent steric pressure of the various surface features alters the vibrational fingerprints of them-terphenyl isocyanides, which are characterized with single-molecule precision through joint experimental and theoretical approaches. This study 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.