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Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide-Metal Interactions by Bi, Liya; Wang, Zhe; Balto, Krista; Tao, Andrea R.; Pascal, Tod A.; Zhang, Yanning; Figueroa, Joshua S.; Li, Shaowei is a scholarly article available to read on EtoBox.

What is Single-Molecule Vibrational Characterization of Binding Geometry Effects on Isocyanide-Metal Interactions about?

Isocyanide-metal binding is governed by sigma-donation and pi-back-bonding, which affects the energy of the isocyanide stretching mode-a characteristic probe for ligand-metal interactions. While extensive correlations exist between structure and spectroscopy in molecular isocyanide-metal systems, isocyanide interactions with metallic crystalline surfaces, where ligands often bind in various geometries, remain poorly understood. Conventional vibrational spectroscopies, such as infrared and Raman, lack the molecular-scale resolution needed to distinguish these inhomogeneous configurations. In contrast, inelastic electron tunneling spectroscopy with scanning tunneling microscopy (STM-IETS) enables direct visualization of ligand adsorption geometries and their vibrational signatures. Using STM-IETS, here we investigate a matal-adsorbed m-terphenyl isocyanie ligand and find that adsorption geometry on Cu(100) induces a significant shift in isocyanide stretching frequency, even greater than replacing Cu(100) with Ag(111). Density functional theory confirms this shift arises from atomic-scale variations in isocyanide-metal binding. This study elucidates how atomic-scale binding influences

Author

Bi, Liya; Wang, Zhe; Balto, Krista; Tao, Andrea R.; Pascal, Tod A.; Zhang, Yanning; Figueroa, Joshua S.; Li, Shaowei

Published

2025

Language

EN