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Synthesis, structure, thermal behavior, thermodynamic, magnetic and luminescent properties of Pr, Sm, Eu, and Gd cymantrenecarboxylatesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Koroteev P.S., Dobrokhotova Zh V., Kiskin M.A., Lermontov A.S., Efimov N.N., Bogomyakov A.S., Tyurin A.V., Bykov M.A., Demina L.I., Velikodny Yu A., Kozyukhin S.A., Novotortsev V.M.
- Журнал: Polyhedron
- Том: 43
- Номер: 1
- Год издания: 2012
- Издательство: Pergamon Press
- Местоположение издательства: United States
- Первая страница: 36
- Последняя страница: 46
- DOI: 10.1016/j.poly.2012.05.030
- Аннотация: New isostructural lanthanide cymantrenecarboxylates [Ln(2)(mu-O,eta(2)-OOCCym)(2)(mu(2)-OOCCym)(2)(mu(2)-OOCCym)(2)(eta(2)-OOCCym)(2)(py)(4)]center dot 2py where Ln = Pr (1), Sm (2), Eu (3), Gd (4) and Cym = (eta(5)-C5H4)Mn(CO)(3), were synthesized and characterized by X-ray diffraction. The crystals of 1-4 are built of discrete binuclear molecules; the Ln atoms are nine-coordinate. The phases produced by thermal elimination of pyridine from complexes 3 and 4 are identical to the phases formed by elimination of THF from the THF-containing cymantrenecarboxylates prepared earlier. The magnetic properties of complex 4 indicate an enhancement of antiferromagnetic interactions between Gd3+ ions due to the substitution of THF for pyridine; in the product of ligand elimination from 4, ferromagnetic interactions were found. It was shown that the lanthanide cymantrenecarboxylates are virtually nonvolatile. The thermal decomposition of the complexes was studied by differential scanning calorimetry (DSC) and thermogravimetry (TGA). Thermolysis of 1-4 in air affords mixtures of LnMn(2)O(5) and Mn2O3. For the earlier prepared complex [Nd-2(mu(2)-OOCCym)(4)(OOCCym)(2)(THF)(4)] (5), standard thermodynamic functions were calculated from adiabatic calorimetry data. Cymantrenecarboxylate ligands appreciably suppress Eu3+ luminescence and determine the spectral and the fluorescent properties of the lanthanide cymantrenecarboxylates. (C) 2012 Elsevier Ltd. All rights reserved.
- Добавил в систему: Великодный Юрий Андреевич