Elucidation of the pressure–induced phase transitions in l-ascorbic acid crystal through synchrotron XRD and Raman studies combined with first-principles calculations

Key Points

• Phase transitions occur in l-ascorbic acid crystals due to applied pressure, indicating structural alteration.
• Key evidence shows distinct peaks in Raman spectra at pressures exceeding 2 GPa, confirming transitions.
• Synchrotron X-ray diffraction and Raman spectroscopy were employed alongside first-principles calculations for analysis.
• Findings suggest that understanding these transitions is crucial for applications in food and pharmaceutical stability.