CRYSTAL STRUCTURE AND SOME PROPERTIES OF EUROPIUM(III) CATENA-{TRIS(1,3-DIETHYL-2-THIOBARBITURATE)}
N. N. Golovnev1, M. S. Molokeev2,3, S. N. Vereshchagin4
1Siberian Federal University, Krasnoyarsk, Russia
2Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
3Far Eastern State Transport University, Khabarovsk, Russia
4Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia
Keywords: кристаллическая структура, комплекс, европий(III), 1,3-диэтил-2-тиобарбитуровая кислота, термический анализ, ИК спектроскопия, фотолюминесценция, crystal structure, complex, europium(III), 1,3-diethyl-2-thiobarbituric acid, thermal analysis, IR spectroscopy, photoluminescence
Abstract
The [Eu(HDTBA)3] n complex (I), HDTBA is 1,3-diethyl-2-thiobarbituric acid (C8H12N2O2S) is synthesized and its structure is determined by X-ray crystallography. The crystals of I are triclinic: a = 11.0205(2) Å, b = 11.8811(3) Å, c = 12.7312(2) Å, a = 100.933(1)°, b = 109.704(1)°, g = 101.161(1)°, V = 1479.88(5) Å3, space group P -1, Z = 2. Each of three independent DETBA- ions is a bridging m2-O,O¢-coordinated ligand. The coordination polyhedron of Eu(III) is a distorted octahedron. Bridging DETBA- organize the octahedra into an infinite two-dimensional layer. The structure contains intramolecular hydrogen bonds but intermolecular hydrogen bonds and the p-p interaction are absent. The results of IR spectroscopy and photoluminescence agree with the single crystal X-ray diffraction data. The main product of the thermal decomposition of I at 900°С is oxysulfate Eu2O2SO4.
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