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- W2896946627 abstract "Two hetero-trinuclear complexes of the type [Eu(btfa)3Pt2-bpy] and [Eu(nta)3Pt2-bpy] (where btfa and nta is the anion of 4,4,4-trifluoro-1-phenyl-1,3-butanedione; 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione, respectively and Pt2bpy = trans-[(Ph)(Et3P)2PtC≡C-R-C≡CPt(PEt3)2(Ph)] (R = 2,2‘-Bipyridine-6,6‘-diyl) have been synthesized by the reaction between [Eu(β-diketonate)3(H2O)2] (β-diketone = btfa and nta) and Pt2bpy complexes in 1:1 M ratio in THF at room temperature. The complexes have been characterized by analytical and spectroscopic methods. The complexes are soluble in common organic solvents. The photophysical properties of the novel hetero-trinuclear complexes have been analyzed by steady-state and time-resolved emission spectroscopy. The complexes exhibit typical red emission of Eu(III). The absence of any residual ligand emission in the 400–550 nm region clearly attests the efficient energy transfer from the triplet state (T1 = 20,408 cm−1) of Pt2bpy chromophore. The quantum efficiency (ϕEu) of [Eu(btfa)3Pt2-bpy] (ФEu∼53.95%) is 1.88 times higher than [Eu(nta)3Pt2-bpy] (ФEu∼28.63%), which could be due the larger value of the non-radiative decay rate (Anrad) ∼ 1754.41 s−1 for [Eu(nta)3Pt2-bpy] compared to Anrad ∼ 779.24 s−1 for [Eu(btfa)3Pt2-bpy]. Photometric characteristics of the complexes such as color correlated temperature (CCT) and luminous efficiency of the radiation (LER) suggest that the new materials may find potential application in high performance optoelectronic devices." @default.
- W2896946627 created "2018-10-26" @default.
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- W2896946627 date "2019-03-01" @default.
- W2896946627 modified "2023-09-26" @default.
- W2896946627 title "Synthesis and photophysical properties of hetero trinuclear complexes of tris β-diketonate Europium with organoplatinum chromophore" @default.
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- W2896946627 doi "https://doi.org/10.1016/j.dyepig.2018.10.011" @default.
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