High-Pressure High-Temperature Synthesis of Mixed Nitridosilicatephosphates and Luminescence of AESiP(3)N(7):Eu2+ (AE=Sr, Ba)

Eisenburger, Lucien; Oeckler, Oliver und Schnick, Wolfgang (2021): High-Pressure High-Temperature Synthesis of Mixed Nitridosilicatephosphates and Luminescence of AESiP(3)N(7):Eu2+ (AE=Sr, Ba). In: Chemistry-A European Journal, Bd. 27, Nr. 13: S. 4461-4465

Abstract

Tetrahedra-based nitrides with network structures have emerged as versatile materials with a broad spectrum of properties and applications. Both nitridosilicates and nitridophosphates are well-known examples of such nitrides that upon doping with Eu2+ exhibit intriguing luminescence properties, which makes them attractive for applications. Nitridosilicates and nitridophosphates show manifold structural variability;however, no mixed nitridosilicatephosphates except SiPN3 and SiP2N4NH have been described so far. The compounds AESiP(3)N(7) (AE=Sr, Ba) were synthesized by a high-pressure high-temperature approach using the multianvil technique (8 GPa, 1400-1700 degrees C) starting from the respective alkaline earth azides and the binary nitrides P3N5 and Si3N4. The latter were activated by NH4F, probably acting as a mineralizing agent. SrSiP3N7 and BaSiP3N7 were obtained as single crystals. They crystallized in the barylite-1O (M=Sr) and barylite-2O structure types (M=Ba), respectively, with P and Si being occupationally disordered. Cation disorder was further supported by solid-state NMR spectroscopy and energy-dispersive X-ray spectroscopy (EDX) mapping of BaSiP3N7 with atomic resolution. Upon doping with Eu2+, both compounds showed blue emission under UV excitation.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 0947-6539
• Sprache: Englisch