W 63 White-Light Emission from an Assembly Comprising Luminescent Iridium and Europium Complexes [Text] / P. Coppo, M. Duati, V. N. Kozhevnikov, J. W. Hofstraat, L. De Cola // Angewandte Chemie International Edition . - 2005. - V. 44, № 12. - P1806-1810 : фото . - ISSN 1433-7851 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Red, white, and blue: White light was obtained by partial energy transfer (ET) between a blue-emitting IrIII-phenylpyridine complex and a red-emitting EuIII-terpyridine chelate through excitation of the assembly that is formed from the two metal complexes (see picture). |
S 98 Synthesis of Functionalized Fluorescent Europium(III) Terpyridyl Chelates [Text] / V. N. Kozhevnikov, D. N. Kozhevnikov, V. L. Rusinov, O. N. Chupakhin, B. Konig // Synthesis. - 2003. - № 15. - P2400-2404. - Bibliogr. : p. 2404 (19 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): DIELS-ALDER REACTION -- HETEROCYCLES -- LANTHANIDE -- LIGANDS -- PYRIDINES -- EUROPIUM Аннотация: The synthesis of substituted terpyridines via triazine intermediates is described. The intermediates allow the facile introduction of cyano groups, which are converted into amino diacetic acid moieties. Together with the terpyridine nitrogen atoms they shield coordinated europium(III) ions completely from the solvent. The terpyridines may be further functionalized for specific applications using ligands, bromo substituents, and standard transition metal mediated coupling methods. This makes the title compounds valuable intermediates for the preparation of luminescent probes in biochemistry, medicinal diagnostics or materials science. \\\\Expert2\\nbo\\Synthesis\\2003, v.15. p.2400.Chupakhin.pdf |
1,2,4-Triazine method of bipyridine ligand synthesis for the preparation of new luminescent Eu(III) complexes [Text] / A. M. Prokhorov, V. N. Kozhevnikov, D. S. Kopchuk, D. N. Kozhevnikov // Tetrahedron. - 2011. - Vol. 67, № 3. - P597-607 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The ‘triazine’ methodology for the synthesis of functionalised bipyridine ligands proved to be a convenient method for the preparation of luminescent Eu(III) complexes. The approach allows flexible construction of chromophore and coordination sphere with control of photophysical properties. Europium (III) complexes [Eu1]-[Eu5] prepared in this way exhibit intense long-life metal-centered luminescence in aqueous media. The aromatic substituent in the position 5 of bipyridine has a significant influence on luminescence parameters and is used to introduce functionality for bioconjugation. The complexes [Eu4] and [Eu5] bearing primary amine groups are ready-to-go luminescent ‘tags’ for peptide labeling \\\\Expert2\\nbo\\Tetrahedron\\2011, v. 67, p. 597.pdf |
C 91 Crystal structure, spectral and thermal properties of 1,2-bis[2-(4,4,4-trifluoro-1-hydroxy-3-oxobut-1-enyl)phenoxy]-ethane and luminescent properties of its complexes with Al(III) and Eu(III) [Electronic resource] / L. A. Khamidullina, K. L. Obydennov, P. A. Slepukhin, I. S. Puzyrev // Journal of Molecular Structure. - 2016. - Vol. 1125. - С. 550-557 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): LANTHANIDE COMPLEXES -- ENOL-TAUTOMERISM -- BETA-DIKETONES Аннотация: Describing the crystal structure, packing, FT-IR, UV-Vis and NMR spectra and thermal properties of new polydentate O-ligand based on aryl-beta-diketone moieties connected by ethylene glycol spacer is the subject of this article. The results of IR, UV-Vis and H-1 NMR spectroscopy as well X-ray crystallography of 1,2-bis[2-(4,4,4-trifluoro-1-hydroxy-3-oxobut-1-enyl)phenoxy]-ethane (BTFPE) indicate that the compound exists in solution and in solid as enol. The crystal structure analysis shows that BTFPE has C2/c group of the monoclinic system. Typical S(6) intramolecular hydrogen bond occurs in each 1,3-diketo moiety. This bond is asymmetric and the H atom is closest to the 0 atom adjacent to the phenyl ring. The packing of the crystal is sustained by numerous C-H center dot center dot center dot O, O-H center dot center dot center dot F, C-H center dot center dot center dot F interactions. In the crystal, supramolecular zig-zag chains are formed along the c-axis. Short contacts interconnect the molecules into a two-dimensional layered structure wherein each molecule is node between chains. According to the thermal investigation this compound is stable up to 200 degrees C in air atmosphere, above this temperature it decomposes. Photoluminescent properties of aluminum(III) and europium(III) complexes of BTFPE were evaluated in chloroform solution and in the solid state. Aluminum complex of BTFPE shows blue luminescence with maximum at 445 nm. Europium complex exhibits intense red color luminescence at 613 nm from central Eu(III) ion through the excitation of the ligand. \\\\expert2\\NBO\\Journal of Molecular Structure\\2016, v.1125, p.550-557.pdf |