Study of O2(1Δg) generation during europium chelate luminescence quenching by molecular oxygen in a liquid solution

Darmanyan, A. P.; Lazorchak, N.; Jardon, Pierre

doi:10.1016/1010-6030(91)85045-i

Cited by 4 publications

(1 citation statement)

References 26 publications

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“…Most trivalent lanthanide ions exhibit characteristic metal-centered line-like f–f luminescence with high color purity in the UV, visible, and near-infrared spectral ranges. − Although the f–f luminescence is long-lived, with a lifetime of up to milliseconds, it is usually not quenched by oxygen …”

Section: Introductionmentioning

confidence: 99%

Influence of Symmetry on the Luminescence and Radiative Lifetime of Nine-Coordinate Europium Complexes

et al. 2015

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Homoleptic mononuclear nine-coordinate lanthanum(III) and europium(III) tris-complexes [Ln(N(∧)N(∧)O)3]·nH2O with two tridentate N-benzylbenzimidazole pyridine-2-carboxylates exhibit a rare C3-symmetry of the lanthanide coordination polyhedron in the solid state, as confirmed by luminescence spectroscopy and by X-ray crystallography (the three N(∧)N(∧)O ligands are arranged "up-up-up" around the lanthanide ion). The symmetry, however, is changed to the more common C1 upon dissolution of the complexes in dichloromethane, as revealed by luminescence spectroscopy (the three ligands are likely to be arranged "up-up-down"). The new europium complexes emit efficient ligand-sensitized metal-centered luminescence with excited-state lifetimes of 1.56-2.18 ms and quantum yields of 25-41% in the solid and in solution. The change of the symmetry from (a higher) C3 to (a lower) C1 alters the luminescence spectrum, shortens the radiative lifetime, and increases the luminescence efficiency of the europium complexes.

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Section: Introductionmentioning

confidence: 99%

Influence of Symmetry on the Luminescence and Radiative Lifetime of Nine-Coordinate Europium Complexes

et al. 2015

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pH‐Controlled Luminescence Turn‐On Behaviour of a Water‐Soluble Europium‐Based Molecular Complex

Singha¹,

Majee

Mondal

et al. 2016

Eur J Inorg Chem

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We have successfully synthesized a new europium metal–organic complex (MOC) [Eu2(pydcH)6]·3H2O (1, H2pydc = 2,6‐pyridinedicarboxylic acid) by the hydrothermal technique as well as simple solvent evaporation in water. Single‐crystal X‐ray crystallographic data of 1 confirms a molecular complex of tricapped trigonal prismatic Eu3+ ions with a free carboxylic acid site of each 2,6‐pyridinedicarboxylic acid ligand. Complex 1 is water‐soluble and remains stable in a broad pH range of 2–11. Upon excitation at 280 nm 1 shows a characteristic ligand‐sensitized metal‐centred visible red luminescence. The luminescence of complex 1 can be further enhanced by changing the pH of the solution in the range of 2–6. Besides, the luminescence response is completely reversible in the range of pH 2–6. The mechanism of the pH‐dependent luminescence behaviour is successfully explained and supported by UV/Vis absorption and IR spectroscopic experiments.

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f-State luminescence of trivalent lanthanide and actinide ions in solution

Beitz

1994

Journal of Alloys and Compounds

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Study of O2(1Δg) generation during europium chelate luminescence quenching by molecular oxygen in a liquid solution

Cited by 4 publications

References 26 publications

Influence of Symmetry on the Luminescence and Radiative Lifetime of Nine-Coordinate Europium Complexes

Influence of Symmetry on the Luminescence and Radiative Lifetime of Nine-Coordinate Europium Complexes

pH‐Controlled Luminescence Turn‐On Behaviour of a Water‐Soluble Europium‐Based Molecular Complex

f-State luminescence of trivalent lanthanide and actinide ions in solution

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