Thermal and spectroscopic studies on solid ibuprofen complexes of lighter trivalent lanthanides

Author(s)

Galico, D. A. ^[1] ; Holanda, B. B. C. ^[1] ; Guerra, R. B. ^[1] ; Legendre, A. O. ^[1] ; Rinaldo, D. ^[1] ; Treu-Filho, O. ^[2] ; Bannach, G. ^[1]

Affiliation

^[1] UNSEP Univ Estadual Paulista, Fac Ciancias, Dept Quim, BR-17033260 Sao Paulo - Brazil

^[2] UNSEP Univ Estadual Paulista, Inst Quim, BR-14800900 Sao Paulo - Brazil

• Document type: Journal article
• Source: Thermochimica Acta; v. 575, p. 226-232, JAN 10 2014.
• Web of Science Citations: 13

Abstract

Solid-state compounds of general formula Ln(L)(3), in which Lis ibuprofen and Ln stands for trivalent La, Ce, Pr, Nd, Sm and Eu, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), X-ray powder diffractometry (DRX), complexometry, Fourier-transformed infrared spectroscopy (FTIR) and thermogravimetry coupled to Fourier-transformed infrared spectroscopy (TG-FTIR) were used to characterize these compounds. The results provided information concerning the chemical composition, dehydration, coordination modes of the ligands, crystallinity of the samples, thermal behavior and thermal decomposition of the compounds. The theoretical and experimental spectroscopic studies suggest that ibuprofen coordinates through the carboxylate group as a chelating ligand. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 12/21450-1 - Thermoanalytical studies, synthesis and characterization of the solid co-crystals of ketoprofen with some co-formers
• Grantee: Gilbert Bannach
• Support Opportunities: Regular Research Grants