Energy transfer in ternary TbEDTA chelates with a series of dipicolinic acid derivatives

Räsänen, Markus; Takalo, Harri; Rosenberg, Jaana; Haapakka, K.; Lukkari, Jukka; Kankare, Jouko

doi:10.1016/j.jlumin.2019.116967

Cited by 4 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, the quenching mechanism of Tb-DPA luminescence remains elusive to date. Temperature dependent measurements showed a moderate temperature dependence of the luminescence lifetimes that, however, is not compatible with the energy separation of the electronic states involved 11 .…”

Section: Resultsmentioning

confidence: 79%

“…The possibility of direct LRET from the singlet states of the ligand was reported for other lanthanide complexes. Recently, Räsänen and coworkers investigated Tb(DPA)3 3along with a series of DPA derivatives 11 . While they also did not observe a rise of Tb fluorescence on a timescale of a few µs, they attempted a calculation of the LRET by assuming energy transfer between the S1 state and the higher levels of Tb 3+ .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

On the sub-50 nanosecond luminescence rise in Tb-DPA complexes

Consani,

Leithold,

Lakata

et al. 2024

Nonlinear Optics and Its Applications 2024

View full text Add to dashboard Cite

Dipicolinic acid (DPA), bound to calcium (Ca), is a main component of bacterial endospores. Complexation of DPA with lanthanide ions, particularly Terbium (Tb), allows for rapid detection via monitoring the lanthanide luminescence, with applications spanning from cell imaging to contamination and biohazard detection, to sterilization control.Here we present time-resolved luminescence of the Tb-DPA complex upon UV excitation at 266 nm. Our measurements directly monitor the luminescence dynamics and speak for a rise of the luminescence on the ns time scale, which is orders of magnitude faster than previously reported, and raise questions about the details of the energy transfer process in this complex and the states involved. The results are relevant for the design of more sensitive detection schemes for Tb-DPA fluorescence, as well as for the design of novel Tb-based luminescence probes or novel fluorescence probes working as FRET acceptors of Tb energy.

show abstract

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

On the sub-50 nanosecond luminescence rise in Tb-DPA complexes

Consani,

Leithold,

Lakata

et al. 2024

Nonlinear Optics and Its Applications 2024

View full text Add to dashboard Cite

show abstract

“…Infrared spectra were obtained using a Golden Gate sampling attachment on a Mattson Satellite 3000 Fourier transform infrared instrument. Masses are quoted as the lowest isotopic mass (for instance, 35 Cl and 79 Br if these elements are involved). For compounds that were soluble in methanol, electrospray (ES) mass spectra were recorded on a Micromass Platform II single-quadrupole mass spectrometer.…”

Section: Methodsmentioning

confidence: 99%

“…[24][25][26][27] The attraction of these complexes is also enhanced by the ability to attach additional functional groups to the 4-position of the pyridine ring. [28,29] However, such studies have typically been restricted to either Eu 3+ or Tb 3+ and involved modification of the 4-position [30][31][32][33][34][35]. For the development of efficient NIR emitting complexes the 3-and 5-positions must also be modified in order to reduce the local phonon energy which leads to deactivation of the Ln 3+ .…”

Section: Introductionmentioning

confidence: 99%

Modified pyridine-2,6-dicarboxylate acid ligands for sensitization of near-infrared luminescence from lanthanide ions (Ln3+ = Pr3+, Nd3+, Gd3+, Dy3+, Er3+)

George

Critchley

Whitehead

et al. 2021

Journal of Luminescence

View full text Add to dashboard Cite

A detailed study of the ability of pyridine-2,6-dicarboxylic acid (1) and its 4-mono-and 3,4,5-trisubstituted analogues to sensitize emission from Pr 3+ , Nd 3+ , Gd 3+ , Dy 3+ and Er 3+ is presented. Sensitization of Ln 3+ emission was demonstrated via the ligands in all complexes, excluding Gd 3+ , with emission covering the spectral range from 500 nm to 1850 nm obtained with variation of the Ln 3+ ion. From the study of the ligand-based photoluminescence obtained from Gd 3+ -complexes, and the relative ligand and Ln 3+ emission obtained from the other complexes, the singlet and triplet state energies of complexes of (1) are estimated to be at 3.1 eV and 2.6 eV respectively whilst for the 3,5-dibromo-substituted complexes (4) they are at 2.9 eV and 2.3 eV. Hypersensitivity of the Er 3+ 4 I15/2 → 2 H11/2 and 4 I15/2 → 4 G11/2 intraatomic transitions is also observed in the 4-chloro-substituted (3) complex. Enhanced sensitization of Nd 3+ (ca. 5-fold) and Er 3+ (ca. 2-fold) near-infrared emission is demonstrated for complexes of (3) and ( 4) respectively in comparison with those of (1).

show abstract

Differential sensitization toward lanthanide metal–organic framework for detection of an anthrax biomarker

Shi²,

Ran³

et al. 2022

Microchim Acta

View full text Add to dashboard Cite

Energy transfer in ternary TbEDTA chelates with a series of dipicolinic acid derivatives

Cited by 4 publications

References 47 publications

On the sub-50 nanosecond luminescence rise in Tb-DPA complexes

On the sub-50 nanosecond luminescence rise in Tb-DPA complexes

Modified pyridine-2,6-dicarboxylate acid ligands for sensitization of near-infrared luminescence from lanthanide ions (Ln3+ = Pr3+, Nd3+, Gd3+, Dy3+, Er3+)

Differential sensitization toward lanthanide metal–organic framework for detection of an anthrax biomarker

Contact Info

Product

Resources

About