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

Autor: Rufino FM; Departamento de Física, Universidade Federal do Ceará, C. P. 6030, CEP 60455-900 Fortaleza, CE, Brazil., Vasconcelos DLM; Faculdade de Educação Ciências e Letras do Sertão Central, Universidade Estadual do Ceará, CEP 63.902-098 Quixadá, CE, Brazil., Freire PTC; Departamento de Física, Universidade Federal do Ceará, C. P. 6030, CEP 60455-900 Fortaleza, CE, Brazil., Oliveira RC; Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, CEP 66075-110 - Belém-PA, Brazil., Remédios CMR; Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, CEP 66075-110 - Belém-PA, Brazil., da Silva JH; Universidade Federal do Cariri, CEP 63000-000 Juazeiro do Norte, CE, Brazil., Alabarse FG; Elettra Sincrotrone Trieste, S.S. 14 km 163.5, Area Science Park, 34149 Basovizza, Trieste, Italy., Lima JA Jr; Departamento de Física, Universidade Federal do Ceará, C. P. 6030, CEP 60455-900 Fortaleza, CE, Brazil. Electronic address: alves@fisica.ufc.br.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2023 Dec 15; Vol. 303, pp. 123264. Date of Electronic Publication: 2023 Aug 15.
DOI: 10.1016/j.saa.2023.123264
Abstrakt: 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 -1 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.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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