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

页码：655 / 658

页数：4

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