Pressure-induced phase transition in hydrogen-bonded supramolecular structure: guanidinium nitrate

Run Wang; Shourui Li; Kai Wang; Defang Duan; Lingyun Tang; Tian Cui; Bingbing Liu; Qiliang Cui; Jing Liu; Bo Zou; Guangtian Zou

doi:10.1021/jp908656m

Pressure-induced phase transition in hydrogen-bonded supramolecular structure: guanidinium nitrate

J Phys Chem B. 2010 May 27;114(20):6765-9. doi: 10.1021/jp908656m.

Authors

Run Wang¹, Shourui Li, Kai Wang, Defang Duan, Lingyun Tang, Tian Cui, Bingbing Liu, Qiliang Cui, Jing Liu, Bo Zou, Guangtian Zou

Affiliation

¹ State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P. R. China.

PMID: 20429614
DOI: 10.1021/jp908656m

Abstract

In situ Raman scattering and synchrotron X-ray diffraction have been used to investigate the effects of high pressure on the structural stability of guanidinium nitrate (C(NH(2))(3)(+).NO(3)(-), GN), a representative two-dimensional supramolecular architecture of hydrogen-bonded rosette network. This study has confirmed a structural phase transition observed by Raman scattering and X-ray diffraction at approximately 1 GPa and identified it as a space group change from C2 to P2(1). The high-pressure phase remained stable up to 22 GPa. We discussed the pressure-induced changes in N-H stretching vibration in Raman spectra and proposed that this phase transition is due to the rearrangements of the hydrogen-bonding networks.