Abstract:Energiesparen ist angesagt! Eine Steigerung der Energieffizienz ermöglichen neue anorganische lumineszierende Materialien, wie sie in Displays und weißen Leuchtdioden (Bild: Farbdiagramm; Mischung der drei Emissionen A–C liefert beliebige Farbtöne innerhalb des Dreiecks) zum Einsatz kommen. In Hg‐freien Leuchtstoffröhren könnten sie einen Beitrag zum Umweltschutz leisten; außerdem liefern sie bessere Szintillatoren für die medizinische Diagnose.magnified imageAngesichts knapp werdender Rohstoffe und des zu erw… Show more
“…0.4582(6) 3 = 4 0.5686(10) 0.069(3) Sr(3) [6] 4c 0.1801(6) 1 = 4 0.4187(13) 0.082(4) Sr(4) [9] 4c 0.4352(10) 1 = 4 0.9874(11) 0.093(5) P(1) [4] 8d 0.6162(6) 0.4314(11) 0.8601(9) 0.053(3) P(2) [4] 8d 0.6524(6) 0.5672(12) 0.5262(10) 0.056(3) P(3) [4] 8d 0.5549(6) 0.4329(11) 0.6729(9) 0.050(3) P(4) [4] 8d 0.7062(6) 0.4296(12) 0.6938(10) 0.058(4) P(5) [4] 8d 0.4709(6) 0.5617(11) 0.8288(10) 0.052(3) P(6) [4] 8d 0.2575(9) 0.9298(16) 0.6378(13) 0.102(7) N(1) [3] -type tetrahedra) in which every O bridges two tetrahedra. [1] Applying this concept to the title compound with k = 1 = 2 , one would expect a three-dimensional network of all-side vertex-sharing PA C H T U N G T R E N N U N G (O,N) 4 tetrahedra.…”
Section: Resultsmentioning
confidence: 97%
“…Synthesis: Oxonitridophosphates can be synthesized from multicomponent reactant systems that consist of metal salts (e.g., halides, sulfides) and P/(O)/N-containing molecules, usually phosphoryl triamide OPA C H T U N G T R E N N U N G (NH 2 ) 3 and thiophosphoryl triamide SPA C H T U N G T R E N N U N G (NH 2 ) 3 . [20,21] At approximately 750 8C, the latter act as P/N and P/O/N sources, respectively [Eqs.…”
Section: Resultsmentioning
confidence: 99%
“…Whereas sodalite-type oxonitridophosphates [8] are microporous, Ba 19 P 36 O 6+x N 66Àx Cl 8+x [9] and Li x H 12ÀxÀy+z [P 12 O y N 24Ày ]X z (X = Cl, Br) [10] exhibit unprecedented frameworks, with the latter representing the first nitridic zeolite-type NPO. In addition, the first nitridic clathrate P 4 N 4 (NH) 4 A C H T U N G T R E N N U N G (NH 3 ) [11] with a unique cage structure that encapsulates ammonia molecules and the first closed layer phosphate Sr 3 P 6 O 6 N 8 [12] suggest an immense potential for the structural chemistry of P/O/N compounds.…”
The oxonitridophosphate SrP(3)N(5)O has been synthesized by heating a multicomponent reactant mixture that consisted of phosphoryl triamide OP(NH(2))(3), thiophosphoryl triamide SP(NH(2))(3), SrS, and NH(4)Cl enclosed in evacuated and sealed silica-glass ampoules up to 750 °C. The compound was obtained as nanocrystalline powder with needle-shaped crystallites. The crystal structure was solved ab initio on the basis of electron diffraction data by means of automated electron diffraction tomography (ADT) and verified by Rietveld refinement with X-ray powder diffraction data. SrP(3)N(5)O crystallizes in the orthorhombic space group Pnma (no. 62) with unit-cell data of a=18.331(2), b=8.086(1), c=13.851(1) Å and Z=16. The compound is a highly condensed layer phosphate with a degree of condensation κ=½. The corrugated layers (∞)(2){(P(3)N(5)O)(2-)} consist of linked, triangular columns built up from P(O,N)(4) tetrahedra with 3-rings and triply binding nitrogen atoms. The Sr(2+) ions are located between the layers and exhibit six-, eight-, and ninefold coordination. FTIR and solid-state NMR spectra of SrP(3)N(5)O are discussed as well.
“…0.4582(6) 3 = 4 0.5686(10) 0.069(3) Sr(3) [6] 4c 0.1801(6) 1 = 4 0.4187(13) 0.082(4) Sr(4) [9] 4c 0.4352(10) 1 = 4 0.9874(11) 0.093(5) P(1) [4] 8d 0.6162(6) 0.4314(11) 0.8601(9) 0.053(3) P(2) [4] 8d 0.6524(6) 0.5672(12) 0.5262(10) 0.056(3) P(3) [4] 8d 0.5549(6) 0.4329(11) 0.6729(9) 0.050(3) P(4) [4] 8d 0.7062(6) 0.4296(12) 0.6938(10) 0.058(4) P(5) [4] 8d 0.4709(6) 0.5617(11) 0.8288(10) 0.052(3) P(6) [4] 8d 0.2575(9) 0.9298(16) 0.6378(13) 0.102(7) N(1) [3] -type tetrahedra) in which every O bridges two tetrahedra. [1] Applying this concept to the title compound with k = 1 = 2 , one would expect a three-dimensional network of all-side vertex-sharing PA C H T U N G T R E N N U N G (O,N) 4 tetrahedra.…”
Section: Resultsmentioning
confidence: 97%
“…Synthesis: Oxonitridophosphates can be synthesized from multicomponent reactant systems that consist of metal salts (e.g., halides, sulfides) and P/(O)/N-containing molecules, usually phosphoryl triamide OPA C H T U N G T R E N N U N G (NH 2 ) 3 and thiophosphoryl triamide SPA C H T U N G T R E N N U N G (NH 2 ) 3 . [20,21] At approximately 750 8C, the latter act as P/N and P/O/N sources, respectively [Eqs.…”
Section: Resultsmentioning
confidence: 99%
“…Whereas sodalite-type oxonitridophosphates [8] are microporous, Ba 19 P 36 O 6+x N 66Àx Cl 8+x [9] and Li x H 12ÀxÀy+z [P 12 O y N 24Ày ]X z (X = Cl, Br) [10] exhibit unprecedented frameworks, with the latter representing the first nitridic zeolite-type NPO. In addition, the first nitridic clathrate P 4 N 4 (NH) 4 A C H T U N G T R E N N U N G (NH 3 ) [11] with a unique cage structure that encapsulates ammonia molecules and the first closed layer phosphate Sr 3 P 6 O 6 N 8 [12] suggest an immense potential for the structural chemistry of P/O/N compounds.…”
The oxonitridophosphate SrP(3)N(5)O has been synthesized by heating a multicomponent reactant mixture that consisted of phosphoryl triamide OP(NH(2))(3), thiophosphoryl triamide SP(NH(2))(3), SrS, and NH(4)Cl enclosed in evacuated and sealed silica-glass ampoules up to 750 °C. The compound was obtained as nanocrystalline powder with needle-shaped crystallites. The crystal structure was solved ab initio on the basis of electron diffraction data by means of automated electron diffraction tomography (ADT) and verified by Rietveld refinement with X-ray powder diffraction data. SrP(3)N(5)O crystallizes in the orthorhombic space group Pnma (no. 62) with unit-cell data of a=18.331(2), b=8.086(1), c=13.851(1) Å and Z=16. The compound is a highly condensed layer phosphate with a degree of condensation κ=½. The corrugated layers (∞)(2){(P(3)N(5)O)(2-)} consist of linked, triangular columns built up from P(O,N)(4) tetrahedra with 3-rings and triply binding nitrogen atoms. The Sr(2+) ions are located between the layers and exhibit six-, eight-, and ninefold coordination. FTIR and solid-state NMR spectra of SrP(3)N(5)O are discussed as well.
“…Dieser Aufsatz gibt nur einen kurzen Überblick über einige der vielversprechendsten Leuchtstoffe. Ausführlichere Übersichten zur Lumineszenz von (Oxo)nitridosilicaten wurden durch Hçppe, [188] Xie, [94] Setlur, [189] He [190] [176] und van Krevel. [192] Seither sind die Lumineszenzund Materialeigenschaften der 2-5-8-Familie und ihrer Mischkristalle vielfach untersucht worden.…”
Silicate sind eine der wichtigsten Verbindungsklassen auf diesem Planeten, und mehr als 1000 Vertreter wurden im Mineralreich bereits identifiziert. Zusätzlich wurden auch mehrere hundert künstliche Silicate synthetisiert. Der Ersatz von Sauerstoff durch Stickstoff führt zur strukturell vielseitigen Klasse der Nitridosilicate. Siliciumnitrid, eines der wichtigsten nichtoxidischen keramischen Materialien, ist die binäre Stammverbindung der Nitridosilicate, und sie symbolisiert die inhärenten Materialeigenschaften dieser Verbindungen. Allerdings ist eine breite systematische Erforschung der Nitridosilicate erst in den letzten Dekaden erfolgt. Mittlerweile haben diese und verwandte Verbindungen ein bemerkenswertes Ausmaß an industrieller Anwendung erreicht. Dieser Aufsatz illustriert jüngste Fortschritte bei der Synthese, der Aufklärung von Struktur‐Eigenschafts‐Beziehungen und den Anwendungen von Nitridosilicaten, Oxonitridosilicaten und den verwandten SiAlONen.
“…The structural diversity of oxosilicates is limited to terminal or singly bridging O atoms, whereas N atoms in nitridophosphates may occur as N [1] , N [2] , N [3] , or even N [4] atoms. [19,20] In this case, for example, green (e.g. Furthermore, nitridic zeolites promise useful chemical and physical properties (for example, adjustable acidity/basicity).…”
Illumination sources based on phosphor-converted light emitting diode (pcLED) technology are nowadays of great relevance. In particular, illumination-grade pcLEDs are attracting increasing attention. Regarding this, the application of a single warm-white-emitting phosphor could be of great advantage. Herein, we report the synthesis of a novel nitridophosphate zeolite Ba3P5N10Br:Eu(2+). Upon excitation by near-UV light, natural-white-light luminescence was detected. The synthesis of Ba3P5N10Br:Eu(2+) was carried out using the multianvil technique. The crystal structure of Ba3P5N10Br:Eu(2+) was solved and refined by single-crystal X-ray diffraction analysis and confirmed by Rietveld refinement and FTIR spectroscopy. Furthermore, spectroscopic luminescence measurements were performed. Through the synthesis of Ba3P5N10Br:Eu(2+), we have shown the great potential of nitridophosphate zeolites to serve as high-performance luminescence materials.
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