Structural diversity of uranyl acrylates. Issue 10 (3rd February 2016)

• Record Type: Journal Article
• Authors: Klepov, Vladislav V.; Vologzhanina, Anna V.; Alekseev, Evgeny V.; Pushkin, Denis V.; Serezhkina, Larisa B.; Sergeeva, Olga A.; Knyazev, Aleksandr V.; Serezhkin, Viktor N.
• Is Part Of: CrystEngComm. Volume 18:Issue 10(2016)
• Page Start: 1723
• Page End: 1731
• Publication Date: 2016-02-03
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c5ce01957e
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Uranyl acrylate can contain different numbers of water molecules and exhibit significant structural diversity caused by flexibility of hydrogen bonds. Abstract : A series of novel uranyl acrylate compounds with a general composition UO2 (CH2 CHCOO)2 · n H2 O, where n = 0, 2, 2.22, or 3, was synthesized and characterized by powder and single crystal X-ray diffraction, and IR spectroscopy. A comprehensive crystal structure analysis was performed by classical methods along with the method of Voronoi–Dirichlet tessellation to reveal the reasons of the unusual structural diversity of uranyl acrylates. Topological relations in hydrated compounds with molecular [UO2 (CH2 CHCOO)2 (H2 O)2 ] complexes, which play the role of the main structural unit, were discussed. Single crystal X-ray diffraction performed at 150 and 250 K indicated a phase transition occurring in the structure of UO2 (CH2 CHCOO)2 ·2H2 O. High temperature powder X-ray diffraction evidences a transformation of a sample of UO2 (CH2 CHCOO)2 ·2H2 O to the waterless compound in the temperature range of 323–373 K.