Quadrupole Contribution of CO Vibrational Band in Sum Frequency Generation Spectra of Organic Carbonates

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 collaborati...

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Bibliographic Details
Published in:The journal of physical chemistry letters 2020-10, Vol.11 (20), p.8527-8531
Main Authors: Wang, Lin, Mori, Wataru, Morita, Akihiro, Kondoh, Masato, Okuno, Masanari, Ishibashi, Taka-aki
Format: Article
Language:English
Subjects:
Physical Insights into Chemistry, Catalysis, and Interfaces
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Summary: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.
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.0c02453