Near-UV-excitable, green-emitting Tb3+-based complexes

Assunção, Israel P.; Bredol, Michael; Kasprzycka, Ewa; Kynast, Ulrich; Lezhnina, Marina M.

doi:10.1016/j.ica.2020.120071

Cited by 6 publications

(11 citation statements)

References 32 publications

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“…[27] The efficiency of the complexes could be greatly enhanced by co-coordination with an ancillary 5,5′-dimethyl-2,2bipyridine ligand (5,5'-dmbipy) to yield a quantum efficiency of 60% at a decay time of 1270 µs, this for the complex Tb(flufenamate) 3 (5,5′-dmbipy) (Fig. 1), [28] which www.publish.csiro.au/ch Australian Journal of Chemistry showed the largest gain over the non-co-coordinated complexes. This gain via co-coordination nurtured our hope that the numerous functional groups on or in bacteria would be able to provide an analogous efficiency boost.…”

Section: Resultsmentioning

confidence: 99%

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Long-lifetime green-emitting Tb

et al. 2022

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The present report describes a new approach to stain bacteria by means of rare earth complexes. We demonstrate with selected Gram-negative and positive bacteria (Escherichia coli, Micrococcus luteus, Bacillus megaterium) that these microbes can be stained efficiently with derivatives of N-phenylanthranilic acid, flufenamic acid in particular, and Tb3+ ions. Hence, the inherent advantages of rare earth complexes, e.g. strong optical absorption (>50 000 L × M−1 × cm−1) due to the antenna effect, large Stokes’ shifts (~10 000 cm−1) and very long emission decay times (millisecond range), and, not least, enhanced photostability can be fully exploited in fluorescence microscopy and spectroscopy of the bacteria; foreseeably, these findings will also be useful in flow cytometry and ELISA techniques.

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Section: Resultsmentioning

confidence: 99%

“…Species Tb(fluf) 3 (H 2 O), solid [ 27] Tb(fluf) 3 (5,5′-dmbp), solid [ 28] Tb 3+ E. coli Tb(fluf) interaction with functional groups of the bacteria. The long lifetimes will be an indispensable asset, exploitable in timegating analyses such as luminescent flow cytometry and time gated microscopy.…”

Section: Discussionmentioning

confidence: 99%

Long-lifetime green-emitting Tb

et al. 2022

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“…The Eu 3+ beads form the very core of the present comparison. Some useful green emitting complexes shall be mentioned ( Assunção et al, 2021 ; Kasprzycka et al, 2021 ; Rochowiak et al, 2022 ; Assunção et al, 2023 ), however, green emitting beads will be dealt with elsewhere. Next to Eu(ttfa) 3 , Eu(btfa) 3 and Eu(ntfa) 3 , we include a novel Eu(3-phenanthtryl-trifluoro diketonate), complex, Eu(ptfa) 3 , and compare the corresponding TOPO complexes’ properties as well as polystyrene beads containing them from “one hand”; the chemical structures of above complexes are reproduced in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

High brightness red emitting polymer beads for immunoassays: Comparison between trifluoroacetylacetonates of Europium

et al. 2023

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Efficiently luminescing spherical polymer particles (beads) in the nanoscale regime of up to approximately 250 nm have become very valuable tools in bioanalytical assays. Eu3+- complexes imbedded in polymethacrylate and polystyrene in particular proved to be extraordinarily useful in sensitive immunochemical and multi-analyte assays, and histo- and cytochemistry. Their obvious advantages derive from both, the possibility to realize very high ratios of emitter complexes to target molecules, and the intrinsically long decay times of the Eu3+-complexes, which allows an almost complete discrimination against bothersome autofluorescence via time-gated measuring techniques; the narrow line emission in conjunction with large apparent Stokes shifts are additional benefits with regard to spectral separation of excitation and emission with optical filters. Last but not least, a reasonable strategy to couple the beads to the analytes is mandatory. We have thus screened a variety of complexes and ancillary ligands; the four most promising candidates evaluated and compared to each other were β-diketonates (trifluoroacetylacetonates, R-CO-CH-CO-CF3, R = - thienyl, -phenyl, -naphthyl and -phenanthryl); highest solubilities in polystyrene were obtained with trioctylphosphine co-ligands. All beads had overall quantum yields in excess of 80% as dried powders and lifetimes well beyond 600 µs. Core-shell particles were devised for the conjugation to model proteins (Avidine, Neutravidine). Their applicability was tested in biotinylated titer plates using time gated measurements and a Lateral Flow Assay as practical examples.

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“…Therefore, increasing the luminescence intensity of rare earth tricolor phosphor to improve the luminescence performance of LEDs has become a research focus all over the world [8] . Among them, Tb 3+ ion is a common highly efficient green light activated ion, which are widely used in the preparation of green phosphors [9–11] . In order to enhance the luminous intensity of green phosphor, some sensitized ions, such as Ce 3+ , Eu 3+ and Gd 3+ , are usually doped into the phosphor containing Tb 3+ ions [12–14] .…”

Section: Introductionmentioning

confidence: 99%

“…[8] Among them, Tb 3 + ion is a common highly efficient green light activated ion, which are widely used in the preparation of green phosphors. [9][10][11] In order to enhance the luminous intensity of green phosphor, some sensitized ions, such as Ce 3 + , Eu 3 + and Gd 3 + , are usually doped into the phosphor containing Tb 3 + ions. [12][13][14] The introduction of Gd 3 + and Ce 3 + ions have a significant effect on enhancing the luminous intensity of Tb 3 + .…”

Section: Introductionmentioning

confidence: 99%

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺

2021

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To enhance the luminous intensity of phosphors containing Tb 3 + , Gd 3 + was used as a sensitizing ion to recombine with Tb 3 + . Gd 3 + and Tb 3 + ions were loaded on the Al 2 O 3 aerogel matrix with nano porous structure via a simple and facile solgel method. After vacuum drying and calcination, Al 2 O 3 : Tb 3 + , Gd 3 + composite aerogel materials were obtained. Al 2 O 3 aerogel matrix has three-dimensional nanostructure and good chemical stability, which can provide stable crystal field and emission site for the rare earth activated ions. The results indicated that the introduction of Gd 3 + can effectively enhance the luminescence intensity of Al 2 O 3 : Tb 3 + at 543 nm under 260 nm UV excitation. The optimal ratio of Gd 3 + and Tb 3 + was determined to be 1: 1. The mechanism of Gd 3 + sensitization to Tb 3 + can be considered as electric multipole resonance transmission. We expected that this work could provide guidance for the development of enhancing the luminous intensity of green phosphors for lamp.

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Near-UV-excitable, green-emitting Tb3+-based complexes

Cited by 6 publications

References 32 publications

Long-lifetime green-emitting Tb

Long-lifetime green-emitting Tb

High brightness red emitting polymer beads for immunoassays: Comparison between trifluoroacetylacetonates of Europium

Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺

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Near-UV-excitable, green-emitting Tb3+-based complexes

Cited by 6 publications

References 32 publications

Long-lifetime green-emitting Tb

Long-lifetime green-emitting Tb

High brightness red emitting polymer beads for immunoassays: Comparison between trifluoroacetylacetonates of Europium

Sensitization Mechanism of Alumina Aerogels: Introducing Gd3+ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb3+

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Sensitization Mechanism of Alumina Aerogels: Introducing Gd³⁺ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb³⁺