On the quenching of trivalent terbium luminescence by ligand low lying triplet state energy and the role of the 7F5 level: The [Tb(tta)3 (H2O)2] case

Souza, Adelmo S.; Nunes, Luiz Antônio de Oliveira; Felinto, M.C.F.C.; Brito, Hermi F.; Malta, O.L.

doi:10.1016/j.jlumin.2015.06.020

Cited by 31 publications

(8 citation statements)

References 13 publications

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“…7 F J ,a nd T 1L2 !S 0L2 are responsible for weak emission at room temperature with the lifetimeo fa bout 11 and 27 ms( Ta ble 2; Supporting Information, Figure S6). This is different from what hasb een observed by Souza et al [52] for the complex with thenoyltrifluoroacetonate with the energy of barycentero ft he ligand triplet state nearly the same (540 nm) as in our 2Tb complex (555 nm). Differencesi n intensity of the temperature dependent sensitized emission for these both complexes may result from different mechanism of the energy transfer.M oreover,t he donor-acceptor distance plays an important role.…”

Section: Analysis Of Energytransfercontrasting

confidence: 99%

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu³⁺ and Tb³⁺ Luminescence by Sulfonylamidophosphates

Kasprzycka

Trush

Amirkhanov

et al. 2016

Chemistry A European J

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A series of stable lanthanide complexes Na[Ln(L) ] (Ln=La , Eu , Gd , Tb , with L=dimethyl(4-methylphenylsulfonyl)amidophosphate and dimethyl-2-naphthylsulfonylamidophosphate) were synthesized. The compounds were characterized by single-crystal X-ray diffraction, IR, absorption, and emission spectroscopy at 293 and 77 K. In contrast to the usual and well-known dominant role of the ligand triplet state in intramolecular energy transfer processes in Ln complexes, in this particular new class of Ln compounds with sulphonylamidophosphate ligands, strong experimental and detailed theoretical evidence suggest a dominant role is played by the ligand first excited singlet state. The importance of the role played by the F level in the case of the Tb compound in this process is shown. The theoretical approach for the energy transfer rates was successfully applied to the rationalization of the experimental data. The higher-lying excited levels of Eu ( D , L , G ) and Tb ( D , G , L , H , F , I ) were included in the calculations for the first time. Both the multipolar and exchange mechanisms were taken into account. The experimental intensity parameters (Ω ), emission lifetimes (τ), radiative (A ) and non-radiative (A ) decay rates, and quantum yields (theoretical and experimental) were determined and are discussed in detail.

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Section: Analysis Of Energytransfercontrasting

confidence: 99%

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu³⁺ and Tb³⁺ Luminescence by Sulfonylamidophosphates

Kasprzycka

Trush

Amirkhanov

et al. 2016

Chemistry A European J

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“…The backward energy transfer from the acceptor (Eu 3+ ) to the donor (Tb 3+ ) is certainly operative, particularly considering that the lifetime of the 7 F 5 level of the Tb 3+ ion is curiously abnormally high. − However, from the data in Figures and and the relative energy position of the 5 D 4 (Tb 3+ ) level, it is not difficult to realize that the overall energy backward transfer (acceptor → donor) should be much less important than the overall forward transfer. The quantitative balance between these two processes would require a detailed solution and analysis of an appropriate system of rate equations in order to describe the transient of the 5 D 4 (Tb 3+ ) level, a point which is outside the scope of the present work.…”

Section: Resultsmentioning

confidence: 99%

Theoretical and Experimental Investigation of the Tb³⁺ → Eu³⁺ Energy Transfer Mechanisms in Cubic A₃Tb_0.90Eu_0.10(PO₄)₃ (A = Sr, Ba) Materials

et al. 2020

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In this study the optical spectroscopy, the excited state dynamics, and in particular the Tb3+ → Eu3+ energy transfer, have been investigated in detail both from the theoretical and experimental point of view in eulytite double phosphate hosts A3Tb(PO4)3 (A = Sr, Ba) doped with Eu3+. It has been found that the energy transfer is strongly assisted by fast migration in the donor Tb3+ subset. Moreover, the transfer rates and efficiencies depend significantly on the nature of the divalent elements present in the structure and hence on the distances between Tb3+-Eu3+ nearest neighbors. It is shown that the competition between quadrupole–quadrupole and exchange interaction is crucial in accounting for the transfer rates.

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“…Sizeable emission under UV illumination and well-resolved spectra were observed for Pr 3+ , Nd 3+ , Sm 3+ , Eu 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , Tm 3+ , and Yb 3+ derivatives. Because of energy back transfer, the Eu 3+ derivative is brighter than the Tb 3+ one. , Additionally, Eu- and Tb-based molecular alloys formed with the optically inactive Gd 3+ ion, with general chemical formula [Ln 1– x Gd x (phen)(glu)(NO 3 )] ∞ , exhibit very different luminance. An unprecedented camel-back-like dependence of the luminance versus x is observed as various energy-transfer mechanisms became dominant for a given x .…”

Section: Discussionmentioning

confidence: 99%

Highly Luminescent Europium-Based Heteroleptic Coordination Polymers with Phenantroline and Glutarate Ligands

et al. 2021

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Isostructural lanthanide-based coordination polymers with general chemical formula [Ln(phen)(glu)(NO3)]∞ with Ln = La–Tm (except Ce and Pm) have been synthesized by hydrothermal methods (H2glu stands for glutaric acid and phen stands for 1,10-phenantroline). They crystallize in the monoclinic system with the P21/c (no. 14) space group. The crystal structure has been solved on the basis of the La derivative. It can be described as the superimposition of molecular chains of dimeric La(phen)(NO3)-La(phen)(NO3) units bridged by glutarate ligands. Luminescent properties have been explored and show that the Eu derivative exhibits the highest luminance observed for Eu-based coordination polymers (85 to 105 cd·m–2). Effects of the dilution of the Eu3 + and Tb3 + luminescent ions by Gd3 + optically inactive ions are unexpected and to the best of our knowledge unprecedented. This could be related to the different intermetallic energy-transfer mechanisms in competition and to the nonisotropic distribution of the lanthanide ions in these molecular alloys. The investigation of molecular alloys with general chemical formula [Eu1–x Tb x (phen)(glu)(NO3)]∞ with 0 ≤ x ≤ 1 highlights a very sizable and constant Eu3 + luminescence whatever the x value, which further confirms the existence of very strong intermetallic energy transfers in this family of compounds. It is also noticeable that some coordination polymers based on weakly emissive lanthanide ions exhibit very well defined emission spectra.

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On the quenching of trivalent terbium luminescence by ligand low lying triplet state energy and the role of the 7F5 level: The [Tb(tta)3 (H2O)2] case

Cited by 31 publications

References 13 publications

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu³⁺ and Tb³⁺ Luminescence by Sulfonylamidophosphates

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu³⁺ and Tb³⁺ Luminescence by Sulfonylamidophosphates

Theoretical and Experimental Investigation of the Tb³⁺ → Eu³⁺ Energy Transfer Mechanisms in Cubic A₃Tb_0.90Eu_0.10(PO₄)₃ (A = Sr, Ba) Materials

Highly Luminescent Europium-Based Heteroleptic Coordination Polymers with Phenantroline and Glutarate Ligands

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On the quenching of trivalent terbium luminescence by ligand low lying triplet state energy and the role of the 7F5 level: The [Tb(tta)3 (H2O)2] case

Cited by 31 publications

References 13 publications

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu3+ and Tb3+ Luminescence by Sulfonylamidophosphates

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu3+ and Tb3+ Luminescence by Sulfonylamidophosphates

Theoretical and Experimental Investigation of the Tb3+ → Eu3+ Energy Transfer Mechanisms in Cubic A3Tb0.90Eu0.10(PO4)3 (A = Sr, Ba) Materials

Highly Luminescent Europium-Based Heteroleptic Coordination Polymers with Phenantroline and Glutarate Ligands

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Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu³⁺ and Tb³⁺ Luminescence by Sulfonylamidophosphates

Contribution of Energy Transfer from the Singlet State to the Sensitization of Eu³⁺ and Tb³⁺ Luminescence by Sulfonylamidophosphates

Theoretical and Experimental Investigation of the Tb³⁺ → Eu³⁺ Energy Transfer Mechanisms in Cubic A₃Tb_0.90Eu_0.10(PO₄)₃ (A = Sr, Ba) Materials