Thermal behaviour of α-hydroxyisobutyric acid, sodium α-hydroxyisobutyrate and its compounds with some bivalent transition metal ions

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dc.contributor.authorGomes, D. J C [UNESP]
dc.contributor.authorCaires, F. J. [UNESP]
dc.contributor.authorLima, L. S. [UNESP]
dc.contributor.authorGigante, A. C. [UNESP]
dc.contributor.authorIonashiro, Massao [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:29:32Z
dc.date.available2014-05-27T11:29:32Z
dc.date.issued2013-05-22
dc.description.abstractSynthesis, characterization and thermal decomposition of bivalent transition metal α-hydroxyisobutyrates, M(C4H7O 3)2·nH2O (M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II)), as well as the thermal behaviour of α-hydroxyisobutyric acid and its sodium salt were investigated employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), infrared spectroscopy (FTIR), TG-DSC coupled to FTIR, elemental analysis and complexometry. All the compounds were obtained as dihydrated, except the copper one which was obtained in the anhydrous state. The thermal decomposition of the anhydrous compounds occurs in a single or two steps and the final residue up to 235 C (Mn), 300 C (Fe), 305 C (Co), 490 C (Ni), 260 C (Cu) and 430 C (Zn) is Mn2O3, Fe2O3, Co3O 4, NiO, CuO and ZnO, respectively. The results also provided information concerning the ligand's denticity and identification of the gaseous products evolved during the thermal decomposition of these compounds. Copyright © 2013 Published by Elsevier B.V. All rights reserved.en
dc.description.affiliationInstituto de Química Universidade Estadual Paulista, CP 355, 14801-970 Araraquara, SP
dc.description.affiliationUnespInstituto de Química Universidade Estadual Paulista, CP 355, 14801-970 Araraquara, SP
dc.format.extent7-12
dc.identifierhttp://dx.doi.org/10.1016/j.tca.2013.03.021
dc.identifier.citationThermochimica Acta, v. 564, p. 7-12.
dc.identifier.doi10.1016/j.tca.2013.03.021
dc.identifier.issn0040-6031
dc.identifier.lattes8460531302083773
dc.identifier.scopus2-s2.0-84877862644
dc.identifier.urihttp://hdl.handle.net/11449/75424
dc.identifier.wosWOS:000321094600002
dc.language.isoeng
dc.relation.ispartofThermochimica Acta
dc.relation.ispartofjcr2.189
dc.relation.ispartofsjr0,605
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectα-Hydroxyisobutyrate
dc.subjectBivalent transition metals
dc.subjectEvolved gases
dc.subjectThermal decomposition
dc.subjectThermal stability
dc.subjectAnhydrous compounds
dc.subjectComplexometry
dc.subjectEvolved gas
dc.subjectGaseous products
dc.subjectInformation concerning
dc.subjectSodium salt
dc.subjectThermal behaviours
dc.subjectCopper
dc.subjectDecomposition
dc.subjectDifferential scanning calorimetry
dc.subjectInfrared spectroscopy
dc.subjectIron compounds
dc.subjectManganese
dc.subjectMetal ions
dc.subjectNickel
dc.subjectPyrolysis
dc.subjectThermodynamic stability
dc.subjectThermogravimetric analysis
dc.subjectZinc
dc.subjectZinc compounds
dc.subjectZinc oxide
dc.subjectCobalt compounds
dc.titleThermal behaviour of α-hydroxyisobutyric acid, sodium α-hydroxyisobutyrate and its compounds with some bivalent transition metal ionsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.lattes8460531302083773
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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