High-pressure-induced structural changes in molecular crystals preserving the space group symmetry: anisotropic distortion/isosymmetric polymorphism

被引：106

作者：

Boldyreva, EV ^{[1
]}

机构：

[1] Novosibirsk State Univ, Inst Solid State Chem & Mechanochem, SB RAS, Novosibirsk 630128, Russia

来源：

CRYSTAL ENGINEERING | 2003年 / 6卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

high pressure; anisotropic lattice strain; molecular crystals; hydrogen bonds; isosymmetric phase transitions;

D O I：

10.1016/j.cryseng.2003.11.005

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pressure-induced structural changes in molecular crystals that are not accompanied by a change in space group symmetry are considered. Anisotropic structural strain of the same polymorph and isosymmetric polymorphic transition are two possibilities which are illustrated in the examples of Co(III)nitropentaammine chloride, the monoclinic and orthorhombic polymorphs of paracetamol, the alpha- and gamma-polymorphs of glycine, benzoquinone (anisotropic structural strain) and sodium oxalate (isosymmetric polymorphic transition). The experiments described were carried out in diamond anvil cells, and the structural Changes were monitored by X-ray powder and single crystal X-ray diffraction, and IR and Raman spectroscopy. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：235 / 254

页数：20

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