We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
High‐pressure‐induced multiple phase transitions of parabanic acid.
- Authors
Duan, Ruijie; Li, Xiaoming; Dai, Yuxiang; Liu, Yongli; Qi, Yang; Liu, Wengang; He, Ben‐Guo
- Abstract
In situ high‐pressure Raman spectroscopy experiments have been performed to investigate the structural changes of parabanic acid (PA) up to ~12.0 GPa. The analysis of Raman spectroscopy reveals that PA undergoes two phase transitions. The collapse of spacing between molecular layers and the distortion of hydrogen‐bonding networks almost in ac‐plane are the main causes of the first phase transition above 2.1 GPa. The changes of Fermi resonance parameters also provide evidence for the first phase transitions. The second phase transition around 4.0 GPa can attribute to the further reduction of the molecular interlayer spacing and the resulting distortion of hydrogen‐bonding network. First‐principle calculations and Hirshfeld surfaces further confirm the analysis of the experimental results. The analysis of high‐pressure phase transition contributes a better explanation for the high‐pressure phase transition process of layered supramolecular materials with hydrogen‐bond self‐assembly. This study provides the possibility of two new polymorphs for PA under high pressure and is helpful for broadening its potential application of this material, especially in the field of supramolecular chemistry.
- Subjects
PHASE transitions; SUPRAMOLECULAR chemistry; RAMAN spectroscopy; HIGH pressure (Technology); ACIDS; RESONANCE
- Publication
Journal of Raman Spectroscopy, 2023, Vol 54, Issue 4, p404
- ISSN
0377-0486
- Publication type
Article
- DOI
10.1002/jrs.6494