کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1625135 | 1516425 | 2008 | 4 صفحه PDF | دانلود رایگان |
Eu(III) Keggin's and Dawson's type of polyoxometalates (POM) complexes were synthesized and spectroscopically characterized. This work presents results obtained for chosen hybrids of acetato K12[{Eu(SiMoxW11−xO39)(H2O)}2(CH3COO)2]·nH2O, K16[{Eu(CH3COO)(H2O)2(P2W17O61)}2]·nH2O and oxalato (NH4)29K5[{Eu(P2W17O61)}4(C2O4)3(H2O)4]·nH2O, where x = 0, 1. The solid state compositions of the hybrids were characterized by using elemental and ICP-AES analysis, derivatography and FTIR spectroscopy. Luminescence characteristics (intensity, quantum yields, luminescence lifetimes and excitation spectra in the range of the 5D0 ← 7F0 transition) of the synthesized Eu(III) acetato and oxalato complexes were determined in the solid phase and in solution, and they were compared to their parent Eu(III):POM complexes of 1:1 stoichiometry (ML).
Journal: Journal of Alloys and Compounds - Volume 451, Issues 1–2, 28 February 2008, Pages 384–387