Chirality discrimination at the carvone air/liquid interfaces detected by heterodyne-detected sum frequency generation

Yang Wang; Jianbin Du; Xiangyun Ma; Huijie Wang; Keng C Chou; Qifeng Li

doi:10.1016/j.heliyon.2019.e03061

Chirality discrimination at the carvone air/liquid interfaces detected by heterodyne-detected sum frequency generation

Heliyon. 2019 Dec 17;5(12):e03061. doi: 10.1016/j.heliyon.2019.e03061. eCollection 2019 Dec.

Authors

Yang Wang¹, Jianbin Du¹, Xiangyun Ma¹, Huijie Wang¹, Keng C Chou², Qifeng Li¹

Affiliations

¹ School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China.
² Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.

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.

Keywords: Air/liquid interface; Analytical chemistry; Enantiomers; HD-SFG; Intrinsic chirality; Organic chemistry; Physical chemistry.