Pressure-induced phase transitions in monohydrated l-asparagine aminoacid crystals

被引：59
|
作者：
Moreno, AJD [1 ]
Freire, PTC [1 ]
Melo, FEA [1 ]
Silva, MAA [1 ]
Guedes, I [1 ]
Mendes, JM [1 ]
机构：
[1] UNIV FED MARANHAO,DEPT FIS,BR-65080040 SAO LUIS,MA,BRAZIL
来源：
SOLID STATE COMMUNICATIONS | 1997年 / 103卷 / 12期
关键词：
organic crystals; phase transitions; inelastic light scattering;
D O I：
10.1016/S0038-1098(97)00264-0
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Single-crystal samples of monohydrated I-asparagine, C4N2O3H8. H2O, a fundamental aminoacid of the human body and other complex beings, have been studied by Raman spectroscopy in a diamond-anvil cell up to pressures of 2.0 GPa. From the analysis of results we observed that the crystal undergoes a series of three phase transitions. All transitions are accompanied by drastic changes in the external modes and in some internal modes of the crystal, which shows in a clearway the transitions induced by the hydrostatic pressure. Pressure coefficients for external modes are also given. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码：655 / 658
页数：4
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