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Raman, IR, and surface-enhanced Raman scattering (SERS) were employed for the vibrational characterization of papaverine in the free and adsorbed state. The vibrational assignments were performed by means of density functional theory (DFT) calculations. The adsorption of the molecule was concluded with the isoquinoline and the benzene ring close to the silver surface in tilted orientations. Employing...
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