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Updated: Dec 31, 2025

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
Published on: August 13, 2019
Chirality discrimination at the carvone air/liquid interfaces detected by heterodyne-detected sum frequency
Yang Wang1, Jianbin Du1, Xiangyun Ma1
1School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China.
Abstract:
The chiral signal of the carvone air/liquid interface is probed by heterodyne-detected sum frequency generation (HD-SFG) without the electronic resonance. The chiral SFG spectra exhibit two distinguishable spectral signatures. Four chiral vibrational peaks of the R- and S-carvone molecules are with opposite signs, which can directly determine the surface molecular chirality. Two achiral vibrational peaks are also observed with the same sign. The different spectral signatures can provide a detailed chirality characterization at the molecular interface.
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