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X-Ray diffraction and SAED characterisations of RE4O4[PO4]Cl (RE ¼ La, Pr, and Nd) and photoluminescence properties of Eu3+-doped La4O4[PO4]Cl

hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorBEN YAHIA, Hamdi
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorRODEWALD, Ute Ch.
hal.structure.identifierInstitut für Anorganische Chemie
dc.contributor.authorFELDMANN, Claus
hal.structure.identifierInstitut für Anorganische Chemie
dc.contributor.authorROMING, Marcus
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWEILL, François
hal.structure.identifierInstitut für Anorganische und Analytische Chemie
dc.contributor.authorPÖTTGEN, Rainer
dc.date.issued2014
dc.identifier.issn2050-7526
dc.description.abstractEnThe new compounds RE4O4[PO4]Cl (RE = La, Nd, Sm and Gd) were synthesised by solid state reaction via a salt flux route and selected compositions were investigated by SAED, photoluminescence, and powder- and/or single crystal-X-ray diffraction. All the crystal structures consist of an alternation of [RE4O4]4+ and [ClPO4]4− layers. The [RE4O4]4+ layer contains ORE4/4 tetrahedra which share common edges. In the tetragonal RE4O4[PO4]Cl (RE = Pr and Nd) compounds, the PO43− and Cl− anions are located between these layers in a disordered manner. This is reflected by the presence of diffuse streaks parallel to the c* axis on the SAED patterns. These lines disappear for larger rare earth metals and keep the place to well defined superstructure reflections in La4O4[PO4]Cl, with a*superstructure = 4/5a*tetragonal − 2/5b*tetragonal and b*superstructure = 2/5a*tetragonal + 4/5b*tetragonal. The presence of these superstructure reflections is due to a new ordering of the PO43− and Cl− anions between the [RE4O4]4+ layers. The Eu3+-doped La3PO7 and La4O4[PO4]Cl samples show the characteristic Eu3+-related 4f → 4f lines and intense emission of red light upon excitation via the O2− → Eu3+ charge-transfer band at 280 nm. Due to the efficient energy transfer from the charge-transfer state to the 4f-levels, especially, La4O4[PO4]Cl:Eu3+ (5 mol%) may be of potential interest as a red phosphor.
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enX-Ray diffraction and SAED characterisations of RE4O4[PO4]Cl (RE ¼ La, Pr, and Nd) and photoluminescence properties of Eu3+-doped La4O4[PO4]Cl
dc.typeArticle de revue
dc.identifier.doi10.1039/C3TC31466A
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Materials Chemistry C
bordeaux.page1131-1140
bordeaux.volume2
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-00956740
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00956740v1
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