2011/02/22 by A. M. Polubotko, Polubotko, A. M., V. P. Smirnov +1 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Molecular spectroscopy and chirality #Optics (physics.optics) #Spectroscopy and Quantum Chemical Studies #physics.chem-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1102.4412
17 pages, 3 figures, 4 tables
openalex publication_date 2011/02/22 · arxiv created 2011/10/29 · arxiv updated 2011/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The paper analyses the SEHR spectra of symmetrical molecules on the base of the dipole-quadrupole SEHRS theory. Existence of the bands, caused by vibrations transforming after the unit irreducible representations of corresponding symmetry groups is demonstrated. As it follows from the theoretical group analysis, these bands are forbidden in phenazine, pyrazine and in usual HRS in molecules belonging to a large number of groups (Cnh, D and higher symmetry groups for example). Their appearance strongly confirms the dipole-quadrupole SEHRS theory, which is able to explain other features of the SEHR spectra of these molecules also. Investigation of the SEHR spectra of pyridine and crystal violet demonstrates that they can be explained by this theory too. All these results point out the existence of the strong quadrupole light-molecule interaction, which is the reason of surface-enhanced optical processes.