Factors Affecting Luminescence Intensity of Lanthanide Ions. Analytical Applications of Lanthanide Luminescence in Solution

Lis, Stefan

doi:10.12693/aphyspola.84.1003

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…5 Solution state studies on luminescent lanthanides have concentrated on the lanthanide ions that luminesce in the visible region of the spectrum, namely europium, terbium, samarium and dysprosium. [7][8][9][10][11] The main body of work in this area has dealt with europium and terbium complexes, which have long (millisecond order) luminescence lifetimes that are simple to detect and measure. 12-14 More recently, a number of groups have begun to exploit developments in detection of near-IR luminescence to study the luminescence from neodymium and ytterbium complexes, to the point where these too may be applied in assays.…”

Section: Introductionmentioning

confidence: 99%

Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes†

Beeby

Faulkner

Parker

et al. 2001

J. Chem. Soc., Perkin Trans. 2

135

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Time resolved luminescence spectroscopy and laser flash photolysis have been used to probe the energy transfer processes in the europium, neodymium and terbium complexes of ligand, 1. The ligand, chosen because of the high kinetic stability of lanthanide complexes derived from amide-functionalised azamacrocycles, bears a phenanthridine chromophore that absorbs light at 355 nm, and which can be protonated at low pH. We show that triplet mediated energy transfer to the metal centre occurs in the protonated complexes.

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Section: Introductionmentioning

confidence: 99%

Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes†

Beeby

Faulkner

Parker

et al. 2001

J. Chem. Soc., Perkin Trans. 2

135

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“…excited states. 28 The emission spectrum of the terbium MOF, 4, shows four peaks at 480 nm, 545 nm, 580 nm and 620 nm which correspond to the 5 D 4 -7 F 6 , 5 D 4 -7 F 5 , 5 D 4 -7 F 4 and 5 D 4 -7 F 3 transitions between energy level states of Tb 3+ respectively. 1 The excitation spectra of 2-4 show similar features and are dominated by bands whose high intensity and broad nature is suggestive of ligand to metal charge transfer (LMCT).…”

Section: Resultsmentioning

confidence: 98%

“…This is because the lowest excited (emitting) level in Gd 3+ typically lies above the excited triplet level of organic ligands. 28 The solid-state fluorescence excitation and emission spectra of 2, 3 and 4 are shown in Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

The effect of metal distribution on the luminescence properties of mixed-lanthanide metal–organic frameworks

2018

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A series of lanthanide metal-organic frameworks (MOFs) of the general formula [Ln(Hodip)(HO)]·nHO (Sm, 1; Eu, 2; Gd, 3; Tb, 4; Dy, 5; Er, 6; Hodip = 5,5'-oxydiisophthalic acid) have been prepared and shown crystallographically to have isostructural three-dimensional frameworks. The fluorescence emission spectra of the europium compound 2, which is red, and the terbium compound 4, which is green, show characteristic peaks for transitions involving the metal centres, whereas that for the gadolinium compound 3 is dominated by transitions involving Hodip. Using a 1 : 1 : 1 mixture of europium, gadolinium and terbium nitrates in the synthesis resulted in the mixed-metal MOF [GdTbEu(Hodip)(HO)]·nHO 7, for which the ratio of the metal ions was determined using EDX spectroscopy. The fluorescence emission spectrum of 7 is dominated by europium emission bands reflecting the higher proportion of Eu centres and quenching of the terbium fluorescence by metal-to-metal energy transfer. A series of core-shell MOF materials based on the Ln(Hodip)(HO) framework have been prepared in order to isolate the lanthanides in different domains within the crystals. The emission spectra for materials with Gd@Tb@Eu (8) and Tb@Eu@Gd (9) are dominated by terbium emissions, suggesting that physical separation from europium suppresses quenching. In contrast, the material with Eu@Gd@Tb (10) shows only broad ligand bands and europium emissions. This confirms that core-shell MOFs have different fluorescence properties to simple mixed-metal MOFs, demonstrating that the spatial distribution of the metals within a mixed-lanthanide MOF affects the fluorescence behaviour.

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Integrated experimental and theoretical study on the phase transition and photoluminescent properties of ZrO2:xTb3+ (x=1, 2, 4 and 8 mol %)

Lovisa

Gomes

Gracia

et al. 2022

Materials Research Bulletin

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Factors Affecting Luminescence Intensity of Lanthanide Ions. Analytical Applications of Lanthanide Luminescence in Solution

Cited by 4 publications

References 19 publications

Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes†

Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes†

The effect of metal distribution on the luminescence properties of mixed-lanthanide metal–organic frameworks

Integrated experimental and theoretical study on the phase transition and photoluminescent properties of ZrO2:xTb3+ (x=1, 2, 4 and 8 mol %)

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