Wetting effect on optical sum frequency generation (SFG) spectra of d-glucose, d-fructose, and sucrose

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Mar 5:138:834-9. doi: 10.1016/j.saa.2014.10.108. Epub 2014 Nov 13.

Abstract

We report a sum frequency generation (SFG) spectroscopy study of d-glucose, d-fructose and sucrose in the CH stretching vibration regime. Wetting effect on the SFG spectra was investigated. The SFG spectrum of d-glucose changed from that of α-d-glucose into those of α-d-glucose monohydrate by wetting. The SFG spectra showed evidence of a small change of β-d-fructopyranose into other anomers by wetting. SFG spectra of sucrose did not change by wetting. Assignments of the vibrational peaks in the SFG spectra of the three sugars in the dry and wet states were performed in the CH stretching vibration region near 3000cm(-1).

Keywords: CH stretching regime; Fructose; Glucose; Optical sum frequency generation (SFG) spectroscopy; Sucrose.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Fructose / chemistry*
  • Glucose / chemistry*
  • Optical Phenomena*
  • Spectrum Analysis / methods*
  • Sucrose / chemistry*
  • Vibration
  • Wettability

Substances

  • Fructose
  • Sucrose
  • Glucose