高压条件下马来酸的原位拉曼光谱和同步加速器X射线衍射研究。

In situ Raman spectroscopy and synchrotron X-ray diffraction studies on maleic acid under high pressure conditions.

作者信息

Rufino F M, Vasconcelos D L M, Freire P T C, Oliveira R C, Remédios C M R, da Silva J H, Alabarse F G, Lima J A

机构信息

Departamento de Física, Universidade Federal do Ceará, C. P. 6030, CEP 60455-900 Fortaleza, CE, Brazil.

Faculdade de Educação Ciências e Letras do Sertão Central, Universidade Estadual do Ceará, CEP 63.902-098 Quixadá, CE, Brazil.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 15;303:123264. doi: 10.1016/j.saa.2023.123264. Epub 2023 Aug 15.

DOI:10.1016/j.saa.2023.123264

PMID:37611523

Abstract

Maleic acid was studied by Raman spectroscopy and powder synchrotron X-ray diffraction (XRD) under high pressure conditions by using a diamond anvil cell. The Raman spectroscopy measurements were performed from ambient pressure up to 9.2 GPa in the 100-3200 cm spectral range. While the XRD measurements were performed up to 10.1 GPa. Here we present the pressure-dependence behavior from both the Raman modes and cell parameters. Maleic acid lattice parameters decrease anisotropically as a function of pressure and a reduction of 27% in the volume of the unit cell was observed. Modifications in the material's compressibility were observed at around 2 and 6 GPa.

摘要

使用金刚石对顶砧池在高压条件下通过拉曼光谱和粉末同步加速器X射线衍射（XRD）对马来酸进行了研究。拉曼光谱测量在100 - 3200 cm光谱范围内从常压进行到9.2 GPa。而XRD测量则进行到10.1 GPa。在此，我们展示了拉曼模式和晶胞参数的压力依赖性行为。马来酸的晶格参数随压力呈各向异性减小，并且观察到晶胞体积减小了27%。在约2 GPa和6 GPa处观察到材料压缩性的变化。