|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|846590||909207||2016||3 صفحه PDF||ندارد||دانلود رایگان|
Europium pentafluoropropionate 2,2′-bipyridine complex, Eu(C2F5COO)3·bpy (bpy = 2,2′-bipyridine), were synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectroscopy and thermogravimetric analysis (TA).The excitation spectra of the complex demonstrate that the energy collected by “antenna ligands” was transferred to Eu3+ ions efficiently. The room-temperature PL spectra of the complex is composed of the typical Eu3+ ions red emission, due to transitions between 5D0 → 7FJ(J=0→4). The lifetimes of 5D0 of Eu3+ in the complex were examined using time-resolved spectroscopic analysis, and the lifetime values of Eu(C2F5COO)3·bpy were fitting with monoexponential (2585 μs) curve. The decomposition temperature of the complex was 262 °C, which indicates the host complex was quite stable to heat. According to the fluorescence emission spectra, the Judd–Ofelt parameters Ω2, Ω4 of the complexes were calculated and the radiative properties were also presented. The 5D0 radiative lifetime, quantum yield and the stimulated emission cross-section of the complex is excellent, which prove that this complex will be promising material for laser application.
Journal: Optik - International Journal for Light and Electron Optics - Volume 127, Issue 4, February 2016, Pages 2059–2061