The effects of protonation on the surface-enhanced Raman scattering from ATP molecules adsorbed on the Ag electrode

Plasmon-Mediated Photoelectrochemical Hot-Hole Oxidation Coupling Reactions of Adenine on Nanostructured Silver Electrodes

“…The observed bands were attributed to the vibrations of the sugar backbone due to change in adsorption orientation with applied potentials. − However, SERS spectra with the same features have also been observed for adenine on silver nanoparticles (AgNPs) and Ag electrodes . Table S1 in the Supporting Information summarizes three kinds of SERS spectra of adenine derivatives. ,,− Previous reports have ascribed the various SERS alterations of adenine derivatives for several reasons, such as pH values and molecular complex with Ag + . − In addition, the SERS spectra are closely related to the concentration and adsorption orientation properties, − or the potential- and orientation-dependent adsorptions on electrode surfaces . However, these explanations are insufficient to account for the stable peaks observed in the special kind of SERS features.…”

“…The simulated Raman spectrum of DHAP with the SMD model is shown in accordance with the experimental spectrum (Figure 5a). 19,25,71,72 The N−N bond in DHAP changes to a single-bond (1.383 Å) from a double-bond feature (1.263 Å) in azopurine-silver ion complex. Meanwhile, both C−N bonds in the azo group tend to have a double-bond feature.…”