Cesium tetrakis(1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-diono)europiate(III): Synthesis, crystal structure, and luminescence properties期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Cesium tetrakis(1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-diono)europiate(III): Synthesis, crystal structure, and luminescence properties

Authors:	I. V. Taidakov S. S. Krasnosel’skii A. N. Lobanov A. G. Vitukhnovskii Z. A. Starikova

Affiliation:	1. Peoples Friendship University, ul. Miklukho-Maklaya 6, Moscow, Russia 2. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia 3. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russia

Abstract:	Anionic complex Cs⁺[EuL₄]^? (I) is synthesized by the reaction of Eu(NO₃)₃ · 6H₂O with 1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-dione (HL) and CsOH in an aqueous-alcohol medium. Unstable adduct Cs⁺[EuL₄]^? · 2CH₂Cl₂ (Ia) is obtained from a solution in CH₂Cl₂. The structure of complex Ia is determined by X-ray diffraction analysis. The crystals of complex Ia at 100 K are monoclinic, a = 10.8435(5), b = 20.1353(9), c = 23.355(1) Å, β = 92.548(1)°, V = 5094.3(4) Å³, space group P2₁/n, Z = 4, and R = 0.0294. The coordination number of the Cs⁺ ion is 9. The Cs⁺ ion forms shortened (up to 3.3 Å) contacts with the O, N, and F atoms of four diketonate fragments joining the molecules into a three-dimensional structure.

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