Intramolecular deactivation processes of electronically excited Lanthanide(III) complexes with organic acids of low molecular weight

Burek, Katja; Eidner, Sascha; Kuke, Stefanie; Kumke, Michael U.

doi:10.1016/j.saa.2017.09.012

Cited by 10 publications

(5 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Complexed Eu(III) decay times faster than Eu 3+ indicates inhibition mechanisms between Eu(III) and the ligands such as electrons transfers from Eu(III) excited states to the ligands [19,39]. This particular behaviour was only observed with hydroxybenzoic ligands [19,21,39,40]. The non-exponential luminescence decay also indicates the heterogeneity of the γ-PURe HDPs unknown pool.…”

Section: Evidence Of Complexation Phenomenon In Alkaline Mediummentioning

confidence: 99%

“…In this study, we studied a polyesterurethane Estane 5703 ® (PURe) resin, used in the formulation of gloves for glove boxes in the nuclear industry. Eu(III), chosen to investigate the complexing power of HDPs as a non-radioactive chemical analogue of actinides(III) [15], is showing luminescent properties that makes it suitable for both complexation studies and chemical environment probing by Time-Resolved Luminescence Spectroscopy (TRLS) [16][17][18][19][20][21], including complex organic mixtures [5,[22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste

et al. 2019

View full text Add to dashboard Cite

The complexation of Eu(III) by hydro-soluble degradation products (HDPs) from a radio-oxidized polyesterurethane is investigated. The polyesterurethane Estane 5703® (PURe) is radio-oxidized at 1000 kGy with γ-rays at room temperature. The polymer is then hydrolysed by a simplified artificial cement pore water solution (pH 13.3) for 31 days at 60 °C. The HDPs within the leachate are characterized using gas chromatography-mass spectrometry, ionic chromatography, and TOC analyser. The complexation of Eu(III) is studied by time-resolved luminescence spectroscopy (TRLS). The main HDPs are adipic acid – hexane-1,6-dioic acid – and butane-1,4-diol. Unlike HDPs from non-irradiated PURe, the HDPs from 1000 kGy γ-irradiated PURe do form complexes with Eu(III) at pH 13.3. Neither adipate nor butane-1,4-diol are responsible for this complexation. The existence of several types of complexes is evidenced by TRLS and electrospray ionization mass spectroscopy (ESI-MS): complexation reactions and operational constants are proposed. The complexes formed at high pH (from 10 to 13) are different from the lower pH complexes. The lower pH complexes are studied by ESI-MS and two ligands are identified: adipate and an oligomer.

show abstract

Section: Evidence Of Complexation Phenomenon In Alkaline Mediummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The coordination sphere around Eu 3+ ions undergoes a certain change after formation of a complex between the polymer and the [Eu(Phen)2] 3+ fragment. The absence of the 5 D0→ 7 F1 transition can be explained by the fact that the electric field of the ligands distorts and reduces the symmetry of the surroundings of europium ions, thereby increasing the probability of the electric dipole transition ( 5 D0→ 7 F2) compared to the magnetic transition ( 5 D0→ 7 F1) [58]. As a result, the intensity of the 5 D0→ 7 F2 transition in Eu-1 significantly increases.…”

Section: Photoluminescence Spectramentioning

confidence: 99%

Development of metal-polymer luminescent markers for bioimaging: synthesis and optical properties of polymeric europium complexes based on polyvinylpyrrolidone derivatives

Zhidomorova,

Sivtsov,

Selutin

et al. 2024

Preprint

View full text Add to dashboard Cite

Polymeric derivatives of poly-N-vinylpyrrolidone containing different amounts of linker carboxylate ligands (partially hydrolyzed poly-N-vinylpyrrolidone with 5 mol% COOH groups and copolymers of N-vinylpyrrolidone with other monomers) were synthesized. The following copolymers were obtained: N-vinylpyrrolidone/crotonic acid and N-vinylpyrrolidone/N-vinylamidoanthanoic acid (containing 16 and 50 mol% COOH-groups). Metal-polymer complexes (MPC) with varying europium content were prepared through the interaction of the obtained polymers with equimolar amounts of hydroxocomplex Eu(Phen)2(OH)3 (Phen = 1,10-phenanthroline). The polymers and MPC were characterized by elemental analysis, IR, UV-vis spectroscopy and photoluminescence; their cytotoxicity toward living cells was estimated. All the obtained MPC exhibited photoluminescence with higher intensity than that of the reference complex Eu(Phen)2Br3. The dependence of luminescence intensity on the content of metallocenters in MPC was demonstrated. The relative quantum yield of luminescence was found to decrease with increasing europium content in MPC. It was shown that none of the polymers under investigation exhibited cytotoxicity. Furthermore, the presence of the polymeric anion in MPC contributed to a sharp decrease in the toxicity of metallocenter [Eu(Phen)2]solv3+. The MPC based on the N-vinylpyrrolidone/N-vinylamidoanthanoic acid copolymer exhibited no cytotoxicity within the entire investigated concentration range.

show abstract

“…Hence, organic ligands need to meet the following requirements: good ultraviolet absorbance, highly efficient energy transfer, acceptable energy in the launching state, and a moderate lifetime [8]. Rare earth organic ligands fall into three major categories: β-diketones [9], organic carboxylic acids [10], and supramolecular macrocycles [11]. Among them, the coordination ability between rare earth ions and organic carboxylic acids is strong because rare earth ions are hard acids, and oxygen atoms in carboxylic acids are hard bases whose coordination is in accordance with the affinity principle of acids and bases [12].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of a Novel Terbium Complex Coordinated with 10-Undecenoic Acid for UV-Cured Coatings

Jiao

Zhong

Zhou

et al. 2020

International Journal of Polymer Science

View full text Add to dashboard Cite

A UV-cured composite containing a rare earth complex was prepared for this study. First, the photoluminescent terbium complex was synthesized with a long-chain unsaturated fatty acid (10-Undecenoic acid) by a solution precipitation method, resulting in the 10-UA-Tb(III) complex. Its structure was proven by FTIR, elemental analysis, XRD, and TGA. The results indicated that the organic acid ligand successfully coordinated with the Tb 3+ ion and that the complex had a chelate bidentate structure. The emission spectrum of the 10-UA-Tb(III) complex indicated that the complex can emit a bright green light with the unique luminescence of the Tb 3+ ion. Furthermore, the luminescence properties of complexes with different ratios of Tb 3+ and ligand were studied, and the ratio of Tb 3+ and the ligand had an obvious impact on the luminescence intensity of the 10-UA-Tb(III) complex. Subsequently, the prepared rare earth complex was doped into a UV-cured coating in different proportions to obtain a UV-cured composite. The morphology of the rare earth UV-cured composite was observed by SEM. The images showed that the rare earth complex was dispersed uniformly in the polymer matrix. Moreover, the composites could emit fluorescence. Additionally, it has good thermal stability and compatibility with the resin. Therefore, these composites should have potential applications in UV curable materials, such as luminescence coatings.

show abstract

Intramolecular deactivation processes of electronically excited Lanthanide(III) complexes with organic acids of low molecular weight

Cited by 10 publications

References 77 publications

Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste

Interactions between hydro-soluble degradation products from a radio-oxidized polyesterurethane and Eu(III) in contexts of repositories for low and intermediate level radioactive waste

Development of metal-polymer luminescent markers for bioimaging: synthesis and optical properties of polymeric europium complexes based on polyvinylpyrrolidone derivatives

Preparation and Characterization of a Novel Terbium Complex Coordinated with 10-Undecenoic Acid for UV-Cured Coatings

Contact Info

Product

Resources

About