Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. III. Tb3+

Carnall, W. T.; Fields, P. R.; Rajnak, K.

doi:10.1063/1.1669895

Cited by 585 publications

(371 citation statements)

References 13 publications

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“…Interestingly, the ratio B/C ~ 4 is retained in our calculations for the heavier transition metal ions, but not in the experimental data (2.2 for Nb 3+ , 6.5 for Rh 3+ ). The experimental data for the lanthanide(III) ions is exhaustive in aqueous solution, [22][23][24][25] which makes the f n excellent standards for the calibration of theoretical calculations. Here again, the electron repulsion parameters calculated for the gas phase are larger than those obtained experimentally, but we observe a steady improvement along the series for all parameters (F 2 + 37% for Pr 3+ vs. +24% for Tm…”

Section: Resultsmentioning

confidence: 99%

Multiplets of free d- and f-metal ions: A systematic DFT study

Borel¹,

Daul²

2006

Journal of Molecular Structure: THEOCHEM

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Section: Resultsmentioning

confidence: 99%

Multiplets of free d- and f-metal ions: A systematic DFT study

Borel¹,

Daul²

2006

Journal of Molecular Structure: THEOCHEM

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“…37,38 This is because lanthanide f f f transitions are generally forbidden by both spin and Laporte selection rules. 39,40 In contrast, with cerium(III), the lowest energy electronic band in absorption corresponds to the allowed 4f f 5d transition. Although this results in a much broader band than with the other trivalent lanthanides, it does mean that the transition has a reasonable molar absorption coefficient.…”

Section: Introductionmentioning

confidence: 99%

Changes in Hydration of Lanthanide Ions on Binding to DNA in Aqueous Solution

2005

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The interaction of the trivalent lanthanides Ce(III), Eu(III), and Tb(III) with sodium deoxyribonucleic acid (DNA) in aqueous solution has been studied using their luminescence spectra and decays. Complexation with DNA is indicated by changes in luminescence intensity. In the system terbium(III)-DNA, changes in luminescence with pH are suggested to be due to the protonation of phosphate groups. The degree of hydration of Tb(III) on binding to DNA is followed by luminescence lifetime measurements in water and deuterium oxide solutions, and it is found that the lanthanide ion loses at least one hydration water on binding to long double stranded DNA at pH 4.7 and pH 7. Rather different behavior is observed on binding to long or short single stranded DNA, where six water molecules are lost, independent of pH. It is suggested that in this case the lanthanide probably binds to the bases of the DNA backbone. The DNA conformation seems to be an important factor in the binding. In addition, the isotopic effect on terbium luminescence lifetime may provide a useful method to distinguish between single and double stranded DNA. DSC results are consistent with cleavage of the double helix of DNA at pH 9 in the presence of terbium.

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“…where ∆E is the energy difference between the 4 I 15/2 and 4 F 9/2 energy levels (approximately 0.115 eV for aqua ions [43][44][45][46]), k B is Boltzmann's constant, and T is the temperature.…”

Section: Dymentioning

confidence: 99%

Two-color thermosensors based on [Y $$_{1-x}$$ 1 - x Dy $$_x$$ x (acetylacetonate) $$_3$$ 3 (1,10-phenanthroline)] molecular crystals

2017

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We develop a two-color thermometry (TCT) phosphor based on [Y1−xDyx(acetylacetonate)3(1,10-phenanthroline)] ([Y1−xDyx(acac)3(phen)]) molecular crystals for use in heterogeneous materials. We characterize the optical properties of [Y1−xDyx(acac)3(phen)] crystals at different temperatures and Dy concentrations and find that the emission is strongly quenched by increasing temperature and concentration. We also observe a broad background emission (due to the ligands) and find that [Y1−xDyx(acac)3(phen)] photodegrades under 355 nm illumination with the photodegradation resulting in decreased luminescence intensity. However, while decreasing the overall emission intensity, photodegradation is not found to influence the integrated intensity ratio of the 4 I 15/2 → 6 H 15/2 and 4 F 9/2 → 6 H 15/2 transitions. This ratio allows us to compute the temperature of the complex Based on the temperature dependence of these ratios we calculate that [Y1−xDyx(acac)3(phen)] has a maximum sensitivity of 1.5 % K −1 and our TCT system has a minimum temperature resolution of 1.8 K. Finally, we demonstrate the use of [Y1−xDyx(acac)3(phen)] as a TCT phosphor by determining a dynamic temperature profile using the emission from [Y1−xDyx(acac)3(phen)].

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Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. III. Tb3+

Cited by 585 publications

References 13 publications

Multiplets of free d- and f-metal ions: A systematic DFT study

Multiplets of free d- and f-metal ions: A systematic DFT study

Changes in Hydration of Lanthanide Ions on Binding to DNA in Aqueous Solution

Two-color thermosensors based on [Y $$_{1-x}$$ 1 - x Dy $$_x$$ x (acetylacetonate) $$_3$$ 3 (1,10-phenanthroline)] molecular crystals

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