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Cho, Minhaeng
분자 분광학 및 동력학 연구단
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Time-Variable Chiroptical Vibrational Sum-Frequency Generation Spectroscopy of Chiral Chemical Solution

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Title
Time-Variable Chiroptical Vibrational Sum-Frequency Generation Spectroscopy of Chiral Chemical Solution
Author(s)
Lee, Taegon; Oh, Juntaek; Nah, Sanghee; Choi, Dae Sik; Rhee, Hanju; Minhaeng Cho
Publication Date
2021-10-21
Journal
Journal of Physical Chemistry Letters, v.12, no.41, pp.10218 - 10224
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society. All rights reserved.Vibrational sum-frequency generation (VSFG) spectroscopy, a surface-specific technique, was shown to be useful even for characterizing the vibrational optical activity of chiral molecules in isotropic bulk liquids. However, accurately determining the spectroscopic parameters is still challenging because of the spectral congestion of chiroptical VSFG peaks with different amplitudes and phases. Here, we show that a time-variable infrared-visible chiroptical three-wave-mixing technique can be used to determine the spectroscopic parameters of second-order vibrational response signals from chiral chemical liquids. For varying the delay time between infrared and temporally asymmetric visible laser pulses, we measure the chiral VSFG, achiral VSFG, and their interference spectra of bulk R-(+)-limonene liquid and perform a global fitting analysis for those time-variable spectra to determine their spectroscopic parameters accurately. We anticipate that this time-variable VSFG approach will be useful for developing nearly background-free chiroptical characterization techniques with enhanced spectral resolution.
URI
https://pr.ibs.re.kr/handle/8788114/10685
DOI
10.1021/acs.jpclett.1c02479
ISSN
1948-7185
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > 1. Journal Papers (저널논문)
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