Spectroscopic Evidence for a Covalent Sigma Au–C Bond on Au Surfaces Using <sup>13</sup>C Isotope Labeling
Huaiguang Li, Gabriel Kopiec, Frank Müller, Frauke Nyßen, Kyoko Shimizu, Marcel Ceccato, Kim Daasbjerg, Nicolas Plumeré
Abstract
C NMR shift at 165 ppm was identified as an aromatic carbon linked to the gold surface, while the shift at 148 ppm was attributed to C-C junctions in the arylated organic film. This demonstration of the covalent sigma Au-C bond fills the gap in metal-C bonds for organic films on surfaces, and it has great practical and theoretical significance in understanding and designing a molecular junction based on the Au-C bond.
Topics & Concepts
Covalent bondIsotopeSigmaChemistryIsotopic labelingRadiochemistryCrystallographyPhysicsNuclear physicsOrganic chemistryQuantum mechanicsMolecular Junctions and NanostructuresMachine Learning in Materials ScienceAdvanced Chemical Physics Studies