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Successive Crystallization of Organically Templated Uranyl Sulfates: Synthesis and Crystal Structures of [pyH](H3O)[(UO2)3(SO4)4(H2O)2], [pyH]2[(UO2)6(SO4)7(H2O)], and [pyH]2[(UO2)2(SO4)3]статья
Дата последнего поиска статьи во внешних источниках: 17 августа 2021 г.
- Авторы: Nazarchuk Evgeny V., Charkin Dmitri O., Siidra Oleg I.
- Журнал: ChemEngineering
- Том: 5
- Номер: 1
- Год издания: 2021
- Издательство: MDPI Publishing
- Местоположение издательства: Basel, Switzerland, Switzerland
- Номер статьи: 5
- DOI: 10.3390/chemengineering5010005
- Аннотация: Three new uranyl sulfates, [pyH](H3O)[(UO2)3(SO4)4(H2O)2] (1), [pyH]2[(UO2)6(SO4)7(H2O)] (2), and [pyH]2[(UO2)2(SO4)3] (3), were produced upon hydrothermal treatment and successive isothermal evaporation. 1 is monoclinic, P21/c, a = 14.3640(13), b = 10.0910(9), c = 18.8690(17) Å, beta = 107.795(2), V = 2604.2(4) Å3, R1 = 0.038; 2 is orthorhombic, C222(1), a = 10.1992(8), b = 18.5215(14), c = 22.7187(17) Å, V = 4291.7(6) Å3, R1 = 0.030; 3 is orthorhombic, Pccn, a = 9.7998(8), b = 10.0768(8), c = 20.947(2) Å, V = 2068.5(3) Å3, R1 = 0.055. In the structures of 1 and 2, the uranium polyhedra and SO4 tetrahedra share vertices to form [(UO2)3(SO4)4(H2O)2]2(2-) and [(UO2)6(SO4)7(H2O)]2(2-) frameworks featuring channels (12.2 x 6.7 Å in 1 and 12.9 x 6.5 Å in 2), which are occupied by pyridinium cations. The structure of 3 is comprised of [(UO2)2(SO4)3]2(2-) layers linked by hydrogenbonds donated by pyridinium cations. The compounds 1–3 are formed during recrystallizationprocesses, in which the evaporation of mother liquor leads to a stepwise loss of hydration water.
- Добавил в систему: Чаркин Дмитрий Олегович