کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1307994 975161 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and photoluminescent properties of series ternary lanthanide (Eu(III), Sm(III), Nd(III), Er(III), Yb(III)) complexes containing 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionate and carbazole-functionalized ligand
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis and photoluminescent properties of series ternary lanthanide (Eu(III), Sm(III), Nd(III), Er(III), Yb(III)) complexes containing 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionate and carbazole-functionalized ligand
چکیده انگلیسی

A series of new ternary lanthanide complexes Ln(TFNB)3L (where Ln = Eu, Sm, Nd, Er, Yb, TFNB = 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionate, L = 1-(4-carbazolylphenyl)-2-pyridinyl benzimidazole) have been synthesised. The photoluminescence properties and TGA of them are described in detail. The trifluorinated ligand TFNB displays excellent antenna effect to sensitize the Ln(III) ions to emit characteristic spectra. The carbazole-containing ligand L is testified to be an outstanding synergistic ligand. The luminescence properties investigated and the quantum efficiency measured in dichloromethane solution of Eu(TFNB)3L and Sm(TFNB)3L show that the carbazole moiety is good at absorbing energy to sensitize the metal-centered emitting states and can make the complexes more rigid, provide efficient shielding of the Ln(III) core towards external quenching compared with the reference complexes of Eu(TFNB)3(Pybm) and Sm(TFNB)3(Pybm) (Pybm = 2-(2-pyridine)-benzimidazole) which have no carbazole unit. The quantum efficiency of Eu(TFNB)3L in air-equilibrated CH2Cl2 solution is calculated to be 14.8% by using air-equilibrated aqueous [Ru(bpy)3]2+·2Cl− solution as reference sample (Φstd = 2.8%).

The luminescence properties of Eu(TFNB)3L and Sm(TFNB)3L show that the carbazole moiety is good at absorbing energy to sensitize the metal-centered emitting states and can make the complexes more rigid, provide efficient shielding of the Ln(III) core towards external quenching compared with the reference complexes without carbazole unit.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 363, Issue 11, 10 August 2010, Pages 2394–2400
نویسندگان
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