Quadrupole Contribution of C═O Vibrational Band in Sum Frequency Generation Spectra of Organic Carbonates
Lin Wang, Wataru Mori, Akihiro Morita, Masato Kondoh, Masanari Okuno, Taka‐aki Ishibashi
Abstract
Sum Frequency Generation (SFG) is usually governed by surface-selective signals of dipole origin, but it can also contain some bulk signals of quadrupole origin. In this work, we examined the dipole and quadrupole contributions in the C═O stretching band of organic carbonate liquids with collaboration of heterodyne SFG measurement and theoretical analysis. As a result, we found that these spectra are substantially affected by the quadrupole contribution of the bulk, which resolved the discrepancy between the experimental and computational SFG spectra.
Topics & Concepts
QuadrupoleSpectral lineDipoleSum-frequency generationAnalytical Chemistry (journal)ChemistryHeterodyne (poetry)Sum frequency generation spectroscopyMolecular physicsAtomic physicsPhysicsOpticsNonlinear opticsAcousticsOrganic chemistryChromatographyLaserAstronomySolid-state spectroscopy and crystallographySpectroscopy and Quantum Chemical StudiesMolecular Spectroscopy and Structure