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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis, thermoanalytical and spectroscopic studies of trivalent lanthanides (Eu-Ho) complexes with the valsartan ligand

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Author(s):
Ekawa, Bruno [1] ; Sobral Carvalho, Ana Carina [1] ; Fernandes, Richard Perosa [1] ; Carneiro Soares do Nascimento, Andre Luiz [1] ; Caires, Flavio Junior [1, 2]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista, Inst Quim, CP 355, BR-14801970 Araraquara, SP - Brazil
[2] Univ Estadual Paulista, Fac Ciencias, BR-17033260 Bauru, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Thermochimica Acta; v. 686, APR 2020.
Web of Science Citations: 0
Abstract

Trivalent lanthanides (Eu-Ho) complexes with Valsartan ligand were characterized by analytical, thermoanalytical and spectroscopic techniques. The comparison of the thermal decomposition of the compounds were made by plotting a 2D contour map as a facilitator for the data visualization. The thermal behavior was discussed correlating three properties of the compounds: basicity and HOMO-LUMO orbitals of the lanthanides, and the strength of each bond in the molecule. The gaseous products released during the thermal decomposition were: NH3/N2H4, CO2, CO, N2O and an aliphatic compound in air atmosphere; NH3/N2H4, CO2, CO, an unknown compound (two bands between 1200-1100 cm(-1)), and an unsaturated ketone or a mixture of unsaturated hydrocarbon and a ketone in nitrogen atmosphere. The compounds presented an amorphous halo, except holmium; the ligand binds through the tetrazole ring and the carboxylate group binds the lanthanide in monodentate mode; finally, the degree of covalence of the Eu, Dy, and Ho complexes were determined. (AU)

FAPESP's process: 13/09022-7 - Thermoanalytical studies, synthesis and characterization of the solid co-crystals of antibiotics (fluoroquinolones) with some co-formers
Grantee:Massao Ionashiro
Support Opportunities: Regular Research Grants
FAPESP's process: 18/24378-6 - Synthesis, characterization and thermoanalytical study of Valsartan, Candesartan Cilexetil and Olmesartan medoxomil co-crystals
Grantee:Flávio Junior Caires
Support Opportunities: Regular Research Grants
FAPESP's process: 17/14936-9 - Preparation, characterization and thermoanalytical studies of heterogeneous catalysts of double selenates of Mg/Co and Mg/Cu in biodiesel production using different oils
Grantee:Massao Ionashiro
Support Opportunities: Regular Research Grants