ArticleJournal of the American Chemical Society2026
Electronic Coupling of Molecular Complexes to Au Electrodes Mediated via Host-Guest Interactions.
Article in Journal of the American Chemical Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors.
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Abstract
Immobilization of molecular catalysts onto electrode surfaces using host-guest (HG) interactions enables the facile regeneration of electrodes following catalyst degradation. Beyond this practical aspect, the architecture also offers a unique way to study the electronic coupling of molecules to the electrode through a nominally insulating linker. Here, we employ surface-enhanced infrared absorption spectroscopy (SEIRAS) to characterize the binding and electronic coupling of Au-bound HG complexes. Distinct spectral features and binding kinetics differentiate host-bound species from physisorbed analogues, confirming well-defined HG assemblies on the surface. Analysis of the wavenumber shifts of the guest as a function of applied potential suggests that while the coupling of physisorbed guests with the surface is not strong, the host-bound guests show a substantial electronic coupling considering their distance from the surface of ∼1.3 nm. Density functional theory calculations reveal the key role of the host in mediating this long-range coupling between the Au surface and the guest.
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