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Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
Published on: August 13, 2019
A theoretical study of sum-frequency generation for chiral solutions near electronic resonance
Ren-hui Zheng1, Wen-mei Wei, Qiang Shi
1Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, P. R. China. zrh@iccas.ac.cn.
Abstract:
We present a method of calculating sum-frequency generation (SFG) for chiral solutions near electronic resonance including the vibronic contributions, which give reasonable SFG intensities and show the Franck-Condon progressions for SFG. When studying R-1,1'-bi-2-naphthol (R-BN), we found that the calculated spectrum is in good agreement with the experimental one (Phys. Rev. Lett., 2001, 87, 113001). Then we apply this method to investigate SFG for chiral arabinose solutions. Theoretical results show that it may be difficult to observe the corresponding SFG even when the sum-frequency is exactly in resonance with the low-lying excited electronic states. Furthermore, we discuss the reason why SFG of chiral arabinose solutions is small.
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