摘要
Diamond anvil cells combined with Raman spectroscopy and angle-dispersive x-ray diffraction(ADXRD) were used to investigate the compression behavior of cinchomeronic acid(C_7H_5NO_4, CA), a hydrogen-bonded polymorphs. The compression of form-I at approximately 6.5 GPa caused an irreversible phase transition that produced the new polymorph form-III. Lattice and internal modes in the Raman spectra were analyzed to determine the modifications in the local environment of CA form-I molecules. The form-III was indexed and refined to a low-symmetry triclinic structure with space group P1. The mechanism for the phase transition involved the reconstructions in the hydrogen-bonded networks in CA form-I.
Diamond anvil cells combined with Raman spectroscopy and angle-dispersive x-ray diffraction(ADXRD) were used to investigate the compression behavior of cinchomeronic acid(C_7H_5NO_4, CA), a hydrogen-bonded polymorphs. The compression of form-I at approximately 6.5 GPa caused an irreversible phase transition that produced the new polymorph form-III. Lattice and internal modes in the Raman spectra were analyzed to determine the modifications in the local environment of CA form-I molecules. The form-III was indexed and refined to a low-symmetry triclinic structure with space group P1. The mechanism for the phase transition involved the reconstructions in the hydrogen-bonded networks in CA form-I.
作者
颜婷婷
喜冬阳
王俊海
樊旭峰
万晔
张丽秀
王凯
Ting-Ting Yan;Dong-Yang Xi;Jun-Hai Wang;Xu-Feng Fan;Ye Wan;Li-Xiu Zhang;Kai Wang
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.11604224,51805336,and 11774120)
the Open Project of State Key Laboratory of Superhard Materials of Jilin University,China(Grant No.201708)
the Natural Science Foundation of Liaoning Province,China(Grant No.20180550861)
the Education Department of Liaoning Province,China(Grant Nos.LJZ2016031 and LJZ2016030)
Shenyang Jianzhu University Discipline Content Education,China(Grant Nos.XKHY2-105 and XKHY2-101)
