TY - JOUR
T1 - Synthesis and photophysical properties of hetero trinuclear complexes of tris β-diketonate Europium with organoplatinum chromophore
AU - Ilmi, Rashid
AU - Haque, Ashanul
AU - Al-Busaidi, Idris Juma
AU - Al Rasbi, Nawal K.
AU - Khan, Muhammad S.
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/3
Y1 - 2019/3
N2 - 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)2Pt–C≡C-R-C≡C–Pt(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.
AB - 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)2Pt–C≡C-R-C≡C–Pt(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.
KW - Color correlated temperature
KW - Eu(III)
KW - Fluorinated β-diketone: Organoplatinum chromophore
KW - Hetero-trinuclear (d-f-d) complexes
KW - Luminous efficiency of the radiation
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U2 - 10.1016/j.dyepig.2018.10.011
DO - 10.1016/j.dyepig.2018.10.011
M3 - Article
AN - SCOPUS:85054717536
SN - 0143-7208
VL - 162
SP - 59
EP - 66
JO - Dyes and Pigments
JF - Dyes and Pigments
ER -