Synthesis, characterization and thermal studies on solid compounds of 2-chlorobenzylidenepyruvate of heavier trivalent lanthanides and yttrium(III)

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dc.contributor.authorBannach, G.
dc.contributor.authorSchnitzler, E.
dc.contributor.authorTreu, O.
dc.contributor.authorUtuni, VHS
dc.contributor.authorIonashiro, Massao [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Ponta Grossa (UEPG)
dc.date.accessioned2014-05-20T15:27:22Z
dc.date.available2014-05-20T15:27:22Z
dc.date.issued2006-01-01
dc.description.abstractSolid-state compounds of general formula LnL(3)center dot nH(2)O, where Ln represents heavier lanthanides and yttrium and L is 2-chlorobenzylidenepyruvate, have been synthesized. Chemical analysis, simultaneous thermogravimetry-differential analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry, elemental analysis and infrared spectroscopy have been employed to characterize and to study the thermal behaviour of these compounds in dynamic air atmosphere.On heating these compounds decompose in four (Gd, Tb, Ho to Lu, Y) or five (Eu, Dy) steps. They lose the hydration water in the first step and the thermal decomposition of the anhydrous compounds up to 1200 degrees C occurs with the formation of the respective oxide, Tb4O7 and Ln(2)O(3) (Ln=Eu, Gd, Dy to Lu and Y) as final residue. The dehydration enthalpies found for these compounds (Eu, to Lu and Y) were: 65.77, 55.63, 86.89, 121.65, 99.80, 109.59, 131.02, 119.78, 205.46 and 83.11 kJ mol(-1), respectively.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUEPG, Dept Quim, BR-84030000 Ponta Grossa, PR, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent233-240
dc.identifierhttp://dx.doi.org/10.1007/s70973-005-6972-y
dc.identifier.citationJournal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 83, n. 1, p. 233-240, 2006.
dc.identifier.doi10.1007/s70973-005-6972-y
dc.identifier.issn1388-6150
dc.identifier.lattes8460531302083773
dc.identifier.urihttp://hdl.handle.net/11449/37366
dc.identifier.wosWOS:000235452500043
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.relation.ispartofjcr2.209
dc.relation.ispartofsjr0,587
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbenzylidenepyruvatept
dc.subjectrare earthpt
dc.subjectthermal behaviourpt
dc.titleSynthesis, characterization and thermal studies on solid compounds of 2-chlorobenzylidenepyruvate of heavier trivalent lanthanides and yttrium(III)en
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes8460531302083773
unesp.author.orcid0000-0002-8790-5069[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Analítica - IQ