Synthesis, Structure, Thermal Stability, and Magnetic and Luminescence Properties of Dinuclear Lanthanide(III) Pivalates with Chelating N-Donor Ligands

New dinuclear lanthanide pivalate complexes [Tb2(piv)6(Hpiv)6], [Tb2(piv)6(bpy)2], [Tb2(piv)6(phen)2], [Tb2(piv)6(bath)2]·1.5EtOH, and [Eu2(piv)6(bath)2]·2EtOH, as well as the coordination polymer {Tb(piv)3}n, in which piv = (CH3)3CCO2–, bpy = 2,2′‐bipyridine, phen = 1,10‐phenanthroline, bath = 4,7‐...

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Bibliographic Details
Published in:	European journal of inorganic chemistry Vol. 2012; no. 22; pp. 3595 - 3610
Main Authors:	Fomina, Irina G., Dobrokhotova, Zhanna V., Kazak, Vladislav O., Aleksandrov, Grygory G., Lysenko, Konstantin A., Puntus, Lada N., Gerasimova, Vasilisa I., Bogomyakov, Artem S., Novotortsev, Vladimir M., Eremenko, Igor L.
Format:	Journal Article
Language:	English
Published:	Weinheim WILEY-VCH Verlag 01-08-2012 WILEY‐VCH Verlag
Subjects:	Lanthanides Luminescence Magnetic properties N ligands
Online Access:	Get full text
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Summary:	New dinuclear lanthanide pivalate complexes [Tb2(piv)6(Hpiv)6], [Tb2(piv)6(bpy)2], [Tb2(piv)6(phen)2], [Tb2(piv)6(bath)2]·1.5EtOH, and [Eu2(piv)6(bath)2]·2EtOH, as well as the coordination polymer {Tb(piv)3}n, in which piv = (CH3)3CCO2–, bpy = 2,2′‐bipyridine, phen = 1,10‐phenanthroline, bath = 4,7‐diphenyl‐1,10‐phenanthroline, and EtOH = ethanol, were synthesized and characterized by X‐ray diffraction. For the terbium complexes, the magnetic properties and the solid‐state thermolysis were investigated. The phase composition of the solid decomposition products was determined by X‐ray powder diffraction. The photophysical properties of these complexes were analyzed by luminescence, excitation, and phosphorescence spectroscopy, and by lifetime measurements. A comparison of the photophysical data for bpy, phen, and bath complexes shows that the supramolecular organization affects the efficiency of the sensitization of Ln3+ luminescence. All the results obtained provide good prospects for the use of dinuclear lanthanide pivalate complexes as efficient light‐conversion molecular devices (LCMD). A series of dinuclear Tb and Eu pivalates of similar composition were synthesized and structurally characterized. The thermal stability of the complexes increases with the replacement of (CH3)3CCO2– (Hpiv) with 2,2′‐bipyridine (bpy), 1,10‐phenanthroline (phen), or 4,7‐diphenyl‐1,10‐phenanthroline (bath). At 2 K some Tb complexes show a nonlinear dependence of magnetization on the external magnetic field. These pivalates have a relatively broad excitation channel and efficient energy‐transfer scheme.
Bibliography:	Target Programs for Basic Research of the Presidium of the Russian Academy of Sciences Russian Foundation for Basic Research - No. 10-03-00515; No. 09-03-00603; No. 10-03-00898; No. 12-03-00627; No. 11-03-12053 istex:84F5403ABA1251414BCF510F8D859597B37E12AF ArticleID:EJIC201200235 ark:/67375/WNG-XRDCRC9F-X Council on Grants of the President of the Russian Federation - No. NSh-2357.2012.3; No. NSh-1670.2012.3 Division of Chemistry and Materials Science of the Russian Academy of Sciences
ISSN:	1434-1948 1099-0682
DOI:	10.1002/ejic.201200235