Synthesis and structure of two crystalline modifications of Bis(1,10-Phenanthroline)trinitratoeuropium(III) Eu(NO3)3(Phen)2

Садиков, Г. Г.; Анцышкина, А. С.; Кузнецова, И. А.; Rodnikova, M. N.

doi:10.1134/s106377450601010x

Cited by 13 publications

(10 citation statements)

References 2 publications

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“…Despite the enviable scientific interests, the large number of papers and the accumulated knowledge on complexes of Eu (III) with phenanthroline type of ligands, there is still a room for improvement in the fundamental understanding of the photophysical properties of these compounds, as well as in the strategies for their design for application purpose. For example, a number of articles are paying attention to the crystal structure of Eu (III) complexes with phenanthroline and different counter ions as nitrates, chlorides, thiocyanates, carboxylates anions [ 41 , 42 , 43 , 44 , 45 , 46 ]. However, as most of the complexes of lanthanoids with phenanthroline are with poor solubility in solvents usually used in spectroscopy, their photophysical properties are mostly studied in solid state [ 29 , 30 ] and there is limited information on the influence of different counter ions on the energy of the ligand-based triplet excited state, the photophysical properties and the stability of the complexes.…”

Section: Introductionmentioning

confidence: 99%

Luminescent Complexes of Europium (III) with 2-(Phenylethynyl)-1,10-phenanthroline: The Role of the Counterions

et al. 2021

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New antenna ligand, 2-(phenylethynyl)-1,10-phenanthroline (PEP), and its luminescent Eu (III) complexes, Eu(PEP)2Cl3 and Eu(PEP)2(NO3)3, are synthesized and characterized. The synthetic procedure applied is based on reacting of europium salts with ligand in hot acetonitrile solutions in molar ratio 1 to 2. The structure of the complexes is refined by X-ray diffraction based on the single crystals obtained. The compounds [Eu(PEP)2Cl3]·2CH3CN and [Eu(PEP)2(NO3)3]∙2CH3CN crystalize in monoclinic space group P21/n and P21/c, respectively, with two acetonitrile solvent molecules. Intra- and inter-ligand π-π stacking interactions are present in solid stat and are realized between the phenanthroline moieties, as well as between the substituents and the phenanthroline units. The optical properties of the complexes are investigated in solid state, acetonitrile and dichloromethane solution. Both compounds exhibit bright red luminescence caused by the organic ligand acting as antenna for sensitization of Eu (III) emission. The newly designed complexes differ in counter ions in the inner coordination sphere, which allows exploring their influence on the stability, molecular and supramolecular structure, fluorescent properties and symmetry of the Eu (III) ion. In addition, molecular simulations are performed in order to explain the observed experimental behavior of the complexes. The discovered structure-properties relationships give insight on the role of the counter ions in the molecular design of new Eu (III) based luminescent materials.

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Section: Introductionmentioning

confidence: 99%

Luminescent Complexes of Europium (III) with 2-(Phenylethynyl)-1,10-phenanthroline: The Role of the Counterions

et al. 2021

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“…Aromatic N-donors ligands such as 1,10-phenanthroline (hereafter symbolized as phen) are known for being efficient sensitizers of lanthanides ions because they absorb and A c c e p t e d m a n u s c r i p t efficiently transfer energy to the Ln 3+ excited states. [22] A number of [Ln(phen)2(NO3) 3] complexes have been reported to date with Ln = Y, [23] La, [24][25] Ce, [26] Pr, [27] Nd, [27] Sm, [27] Eu, [27][28][29][30][31][32] Gd, [28] Tb, [30,33] Dy, [22,27,34] Ho, [35] Er, [36] Yb, [25,37] and Lu [38] but their luminescent properties have not been studied in details except for the dysprosium-based complex. [22] Hereafter, we report the synthesis, crystal structure and luminescence study of a series of homo-lanthanide complexes with general chemical formula [Ln(phen)…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of lanthanide complexes-based molecular alloys

Maouche

Belaïd

Benmerad

et al. 2020

Inorganica Chimica Acta

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Six lanthanides complexes with chemical formula [Ln(phen)2(NO3)3] (Ln = Sm(1), Tb (2), Nd (3), Eu (4), Ho (5) and Y (6), phen = 1,10-phenanthroline) were synthesized. 1 and 2 were obtained as single crystals by slow diffusion. Structural characterization was based on single crystal X-ray diffraction and IR and 89 Y-NMR spectroscopies. NMR spectroscopic measurements were performed on [Y(phen)2(NO3)3] (6) and [Y0.75Lu0.25(phen)2(NO3)3] (7). Compounds obtained as microcrystalline powders were characterized by powder X-ray diffraction. The complexes crystallize in the monoclinic system, space group P21/n. Each Ln(III) ion is surrounded by four N atoms from two bidentate phenanthroline ligands and six O atoms from three chelating nitrate groups. The phenanthroline ligand provides efficient sensitization of the complexes that exhibit sizeable luminescence under UV irradiation. Thermal properties have been studied. They confirm the absence of water molecules in the crystal structure. The complexes are thermally stable up to 290 °C. Microcrystalline powders of hetero-lanthanide complexes, with global chemical formula [Tb1-xEux(phen)2(NO3)3] (series 8) and [Tb1-xGdx(phen)2(NO3)3] (series 9) were synthesized. Their photo-physical properties have been investigated. They demonstrate that luminescent molecular alloys can be obtained from lanthanides complexes and not only from hetero-nuclear coordination polymers as previously reported.

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“…In Our diffraction data unambiguously prove that the red emitting powders are luminescent composites containing Eu(phen) 2 (NO 3 ) 3 [17,23], while blue emitting gels containing a Si(IV) -1,10 phehnathroline complex are amorphous.…”

Section: Resultsmentioning

confidence: 68%

Preparation and luminescence of silica aerogel composites containing an europium (III) phenanthroline nitrate complex

Gutzov

Danchova

Kirilova

et al. 2017

Journal of Luminescence

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A simple two step procedure for the functionalization of hydrophobic silica aerogel microgranules with europium ions and / or 1,10-phenanthroline is demonstrated. The activation procedure is based on soaking aerogels in a europium nitrate solution, followed by functionalization with 1,10phenanthroline. The functionalized materials display strong red or blue emission at UV-excitation, coming from the formation of [Eu(phen) 2 ](NO 3) 3 or Si(IV)-1,10-phenathroline complexes in the porous system of the aerogels. The most probable site symmetry of the europium cation is C 2v confirmed by luminescence spectra analysis. Room temperature diffuse reflectance spectra and excitation / luminescence spectra are used to describe the optical properties of the hybrid composites. Excitation spectra prove an efficient energy transfer between 1,10phenanthroline and the Eu 3+ ion.

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Synthesis and structure of two crystalline modifications of Bis(1,10-Phenanthroline)trinitratoeuropium(III) Eu(NO3)3(Phen)2

Cited by 13 publications

References 2 publications

Luminescent Complexes of Europium (III) with 2-(Phenylethynyl)-1,10-phenanthroline: The Role of the Counterions

Luminescent Complexes of Europium (III) with 2-(Phenylethynyl)-1,10-phenanthroline: The Role of the Counterions

Luminescence properties of lanthanide complexes-based molecular alloys

Preparation and luminescence of silica aerogel composites containing an europium (III) phenanthroline nitrate complex

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