High pressures studies on bis(L-alaninate)copper(II) by Raman spectroscopy and synchrotron X-ray diffraction.

Autor: de Oliveira RC; Institute of Exact and Naturals Sciences, Federal University of Pará, 66075-110 Belém, PA, Brazil; College of Application (CAp), Federal University of Roraima, 69310-000 Boa Vista, RR, Brazil. Electronic address: raul.oliveira@icen.ufpa.br., Barros AJ; Institute of Exact and Naturals Sciences, Federal University of Pará, 66075-110 Belém, PA, Brazil., Calligaris GA; Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, SP, Brazil., Paraguassu W; Institute of Exact and Naturals Sciences, Federal University of Pará, 66075-110 Belém, PA, Brazil., Remédios CMR; Institute of Exact and Naturals Sciences, Federal University of Pará, 66075-110 Belém, PA, Brazil.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2024 Aug 05; Vol. 316, pp. 124353. Date of Electronic Publication: 2024 Apr 26.
DOI: 10.1016/j.saa.2024.124353
Abstrakt: The crystal of bis(L-alaninate)copper(II) [Cu(C 3 H 6 NO 2 ) 2 ] was studied by Raman spectroscopy and synchrotron X-ray diffraction as a function of hydrostatic pressure, and its vibrational and structural behavior were investigated to analyze its stability at high pressures. The Raman spectra of bis(L-alaninate)copper(II) show changes in vibrational modes that are associated with deformations and stretching of units involving the copper atom. These results indicate that molecular fragments involving the copper atom undergo rotations and discontinuities in bond lengths. The lattice parameters of bis(L-alaninate)copper(II) obtained from Le Bail fits also exhibit changes in the same pressure ranges as the Raman spectra. The discontinuities in the angular parameter beta are compatible with the rotations of the molecular fragments. Bis(L-alaninate)copper(II) undergoes changes, but maintains monoclinic symmetry in the range of 0-20.1 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 © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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