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Solid-state synthesis of LnOCl/Ln2O3 (Ln = Eu, Nd) by using chitosan and PS-co-P4VP as polymeric supports

dc.contributor.authorDiaz C.
dc.contributor.authorCarrillo D.
dc.contributor.authorde la Campa R.
dc.contributor.authorPresa Soto A.
dc.contributor.authorValenzuela M.L.
dc.date.accessioned2020-09-02T22:16:03Z
dc.date.available2020-09-02T22:16:03Z
dc.date.issued2018
dc.identifier10.1016/j.jre.2018.03.031
dc.identifier.citation36, 12, 1326-1332
dc.identifier.issn10020721
dc.identifier.urihttps://hdl.handle.net/20.500.12728/4172
dc.descriptionA series of lanthanide materials of type LnOCl or Ln2O3 (Ln = Eu, Nd) were successfully prepared via a convenient and straightforward two-step procedure. Firstly, and by using chitosan and PS-co-P4VP as polymeric supports, macromolecular complexes of type chitosan·LnCl3 and PS-co-P4VP·LnCl3 were prepared. These macromolecular complexes were treated in solid state at 800 °C under air, leading to the corresponding LnOCl or Ln2O3 materials (Ln = Eu, Nd) with moderate to good yields. The nature of the as-prepared lanthanide materials (LnOCl and/or Ln2O3) is strongly influenced by the polymeric template (i.e., chitosan or PS-co-P4VP), the lanthanide salt precursor, and the polymer/lanthanide molar ratio. Thus, when chitosan·EuCl3 and PS-co-P4VP·EuCl3 are used as macromolecular precursors, a mixture of crystalline phases of both EuOCl and Eu2O3 are obtained. However, when chitosan·NdCl3 and PS-co-P4VP·NdCl3 are used, a sole pure crystalline phase of NdOCl is obtained. The nanostructured lanthanide materials were characterized by means of XRD (X-ray diffraction of powder), SEM, EDS, TEM, and HRTEM. The luminescent spectra of the as-prepared EuOCl/Eu2O3 mixture materials show an emission pattern whose intensity is strongly influenced by the nature of the polymeric precursor, as well as on the metal/polymer molar ratios. © 2018 Chinese Society of Rare Earths
dc.language.isoen
dc.publisherChinese Society of Rare Earths
dc.subjectEuOCl/Eu2O3
dc.subjectLanthanides
dc.subjectLuminescence
dc.subjectNdOCl
dc.subjectRare earths
dc.subjectSolventless method
dc.subjectChitosan
dc.subjectCrystalline materials
dc.subjectEuropium compounds
dc.subjectLuminescence
dc.subjectMacromolecules
dc.subjectMixtures
dc.subjectNeodymium compounds
dc.subjectRare earth elements
dc.subjectRare earths
dc.subjectEuOCl/Eu2O3
dc.subjectLuminescent spectrum
dc.subjectMacromolecular complexes
dc.subjectMacromolecular precursors
dc.subjectNdOCl
dc.subjectPolymeric precursors
dc.subjectSolid-state synthesis
dc.subjectSolventless method
dc.subjectChlorine compounds
dc.titleSolid-state synthesis of LnOCl/Ln2O3 (Ln = Eu, Nd) by using chitosan and PS-co-P4VP as polymeric supports
dc.typeArticle


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