Sol–gel derived Y(PO3)3 polyphosphate: Synthesis and characterization

✍ Scribed by S. Briche; D. Zambon; D. Boyer; G. Chadeyron; R. Mahiou

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 338 KB
• Volume: 28
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2005.09.029

✦ Synopsis

The yttrium polyphosphate Y(PO 3 ) 3 has been synthesized by an all-alkoxide sol-gel route and characterized by X-ray diffraction and IR spectroscopy. The spectroscopic properties of 5% Eu 3+ doped samples prepared by the sol-gel process were investigated under siteselective laser excitation in the 5 D 0 and 5 D 2 levels of trivalent europium ions, and compared with those of similar compounds synthesized through the conventional solid state reaction. Results showed that one distorted crystallographic site is occupied by Eu 3+ ions when spectra are recorded at room temperature. A second site appeared for low temperature measurements in agreement with a phase transition evidenced by a differential scanning calorimetry analysis. These optical results are in disagreement with the already known monoclinic structure of Y(PO 3 ) 3 where four sites have been identified at room temperature for lanthanide ions.