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Synthesis and photoluminescent properties of five homodinuclear lanthanide (Ln3+ = Eu3+, Sm3+, Er3+, Yb3+, Pr3+) complexes

Paper ID Volume ID Publish Year Pages File Format Full-Text
27816 44044 2009 7 PDF Available
Title
Synthesis and photoluminescent properties of five homodinuclear lanthanide (Ln3+ = Eu3+, Sm3+, Er3+, Yb3+, Pr3+) complexes
Abstract

A series of homodinuclear lanthanide complexes Ln2(HTH)6Bpm (where Ln = Eu, Sm, Er, Yb, Pr; HTH = 4,4,5,5,6,6,6-heptafluroro-1-(2-thienyl)hexane-1,3-dione; Bpm = 2,2′-bipyrimidine) were synthesized and the photoluminescence properties of these complexes are described. After ligand-mediated excitation of the complexes, they all show the characteristic luminescence of the corresponding Ln3+ ions in the visible and NIR regions attributed to efficient energy transfer from the ligands to the metal centres. For the Eu2(HTH)6Bpm complex a lifetime of 738.8 μs (100%, χ2 = 1.362) is found in solid and two lifetimes of 455.4 μs (12.88%) and 618.5 μs (87.12%) (χ2 = 1.652) are found in CH2Cl2 solution, respectively. Its quantum efficiency in air-equilibrated CH2Cl2 solution is found to be 28.4%, by using air-equilibrated aqueous [Ru(bpy)3]2+·2Cl− solution as reference sample (Φstd = 2.8%).

Keywords
Homodinuclear lanthanide complexes; 2,2′-Bipyrimidine; Photoluminescence; Characteristic luminescence; Quantum efficiency
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Synthesis and photoluminescent properties of five homodinuclear lanthanide (Ln3+ = Eu3+, Sm3+, Er3+, Yb3+, Pr3+) complexes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 208, Issues 2–3, 15 December 2009, Pages 110–116
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
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