Structural variability of rare-earth bromide complexes with acetylurea
- Autores: Akulinin P.V.1, Savinkina Е.V.1, Grigoriev М.S.2, Belousov Y.А.3,4
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Afiliações:
- MIREA — Russian Technological University
- Frumkin Institute of Physical Chemistry and Electrochemistry RAS
- Lomonosov Moscow State University
- Lebedev Physical Institute RAS
- Edição: Volume 69, Nº 5 (2024)
- Páginas: 727-735
- Seção: КООРДИНАЦИОННЫЕ СОЕДИНЕНИЯ
- URL: https://journals.rcsi.science/0044-457X/article/view/270809
- DOI: https://doi.org/10.31857/S0044457X24050102
- EDN: https://elibrary.ru/YEXFTM
- ID: 270809
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Resumo
New coordination compounds of light rare-earth (RE) bromides with acetylurea (AsUr) were synthesized, [Y(AcUr)2(H2O)4]1.39[Y(AcUr)2(H2O)5]0.61Br6·2H2O (I), [La(AcUr)2(H2O)5]Br3 (II), [Ce(AcUr)2(H2O)5]Br3 (III), [Nd(AcUr)2(H2O)5]Br3 (IV), [Sm(AcUr)2(H2O)5]Br3 (V); elemental analysis, IR spectroscopy and X-ray diffraction were used to determine their compositions and structural features. Compound I is built of the [Y(AcUr)2(H2O)4]3+ and [Y(AcUr)2(H2O)5]3+ cations in the 2.28 : 1; they differ by the number of the inner-sphere water molecules (4 and 5 for coordination numbers 8 and 9, respectively), non-coordinated Br— ions and H2O molecules. Compounds II and III are built of the [Ln(AcUr)2(H2O)5]3+ (Ln = La, Ce) cations and outer-sphere Br— ions. The structures changes on cooling from 296 K to 100 K being isostructural at both temperatures. Compounds IV and V have the same composition, but different structures. They also have different polymorphous modifications at 100 and 296 K. Samarium, terbium and dysprosium bromide complexes of acetyl urea show photoluminescence.
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Sobre autores
P. Akulinin
MIREA — Russian Technological University
Email: savinkina@mirea.ru
Lomonosov Institute of Fine Chemical Technologies
Rússia, MoscowЕ. Savinkina
MIREA — Russian Technological University
Autor responsável pela correspondência
Email: savinkina@mirea.ru
Lomonosov Institute of Fine Chemical Technologies
Rússia, MoscowМ. Grigoriev
Frumkin Institute of Physical Chemistry and Electrochemistry RAS
Email: savinkina@mirea.ru
Rússia, Moscow
Yu. Belousov
Lomonosov Moscow State University; Lebedev Physical Institute RAS
Email: savinkina@mirea.ru
Faculty of Chemistry
Rússia, Moscow; MoscowBibliografia
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