In-situ Raman study of ?-D-glucose under different pressure and temperature

High-pressure Raman and infra-red spectroscopies were employed to explore how the molecular struc-ture of alpha-D-glucose changes under high pressure and temperature. At room temperature, the spectra show a significant pressure dependence and changed abruptly in the 5.7-5.9 GPa pressure range. The spectra of alpha-D-glucose crystals did not change significantly when the temperature was raised from 25 degrees C to 110 degrees C. However, the synergistic effect of temperature and pressure could reduce the pressure to 4.4 GPa, indicating that high temperature may accelerate the change of the molecular structure.(c) 2022 Elsevier B.V. All rights reserved.

Automated summary

High-pressure Raman and infra-red spectroscopies were used to investigate the molecular structure changes of alpha-D-glucose under high pressure and temperature. The spectra showed a significant pressure dependence at room temperature, with an abrupt change in the 5.7-5.9 GPa pressure range. The spectra of alpha-D-glucose crystals did not change significantly with temperature increase from 25°C to 110°C. However, the synergistic effect of temperature and pressure could reduce the pressure to 4.4 GPa, suggesting that high temperature may accelerate the structural change of the molecules.