Synthesis and unusual crystal structure of the Eu(III) complex with 1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-dione

The reaction of Eu(NO3)3 · 6H2O with 1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-dione (HL) in the presence of NaOH in aqueous ethanol gave neutral complex [EuL 3(H2O)] (I). The unstable adduct [EuL3(H 2O)] · 1.3MeCN (Ia) was obtained from an acetonitrile solution and studied by X-ray diffraction. The crystals of Ia at 100 K are monoclinic, a = 17.551(3) Å, b = 11.532(2) Å, c = 20.371(3) Å, β = 110.886(3), V = 3852(1) Å3, space group P21/c, Z = 4, R = 0.0505. The molecules are connected into chains by strong interactions between the europium atom of one molecule and the pyrazole N(2) atom of another molecule and additionally stabilized by strong hydrogen bonds O(1w)-H(1w1).N(4)*. The chains are combined into layers by the hydrogen bonds (1w)-H(2w1).N(2)*. © 2013 Pleiades Publishing, Ltd

Spectral and thermochemical properties of the [Na(H 2O) 4] [EuL 4]·0.775CH 2Cl 2 complex, HL = 1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione

Reaction of Eu(NO 3) 3·6H 2O with 1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione (HL) in the presence of NaOH affords the complex compound [Na(H 2O) 4] [EuL 4]·0.775CH 2Cl 2 (I). The spectral (UV, IR, 1H NMR spectroscopy), and thermo-luminescent (TG-DSC-MS) properties of the complex I, as well as its fragmentation at the laser desorption ionization (LDI-MS) were studied. © Pleiades Publishing, Ltd., 2011

Synthesis and luminescence properties of neutral Tm(III), Dy(III), and Gd(III) complexes with 1,3-Bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione and 1,10-phenanthroline

Neutral complexes of composition [LnL3Phen], where Ln = Tm, Dy, and Gd, were synthesized by the reaction of LnCl3 with heterocyclic diketone 1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedi-one (HL, 1) and 1,10-phenanthroline in an aqueous alcohol solution in the presence of NaOH. The composition of the complexes was proved by elemental analysis. Their optical and luminescence properties were studied. © Pleiades Publishing, Ltd., 2012

Spectral and thermochemical properties of the [Na(H 2O) 4] [EuL 4]·0.775CH 2Cl 2 complex, HL = 1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione

Reaction of Eu(NO 3) 3·6H 2O with 1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione (HL) in the presence of NaOH affords the complex compound [Na(H 2O) 4] [EuL 4]·0.775CH 2Cl 2 (I). The spectral (UV, IR, 1H NMR spectroscopy), and thermo-luminescent (TG-DSC-MS) properties of the complex I, as well as its fragmentation at the laser desorption ionization (LDI-MS) were studied. © Pleiades Publishing, Ltd., 2011

Synthesis and unusual crystal structure of the Eu(III) complex with 1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-dione

The reaction of Eu(NO3)3 · 6H2O with 1-(1,5-dimethyl-1H-pyrazol-4-yl)-4,4,4-trifluorobutane-1,3-dione (HL) in the presence of NaOH in aqueous ethanol gave neutral complex [EuL 3(H2O)] (I). The unstable adduct [EuL3(H 2O)] · 1.3MeCN (Ia) was obtained from an acetonitrile solution and studied by X-ray diffraction. The crystals of Ia at 100 K are monoclinic, a = 17.551(3) Å, b = 11.532(2) Å, c = 20.371(3) Å, β = 110.886(3), V = 3852(1) Å3, space group P21/c, Z = 4, R = 0.0505. The molecules are connected into chains by strong interactions between the europium atom of one molecule and the pyrazole N(2) atom of another molecule and additionally stabilized by strong hydrogen bonds O(1w)-H(1w1).N(4)*. The chains are combined into layers by the hydrogen bonds (1w)-H(2w1).N(2)*. © 2013 Pleiades Publishing, Ltd

Synthesis and luminescence properties of neutral Tm(III), Dy(III), and Gd(III) complexes with 1,3-Bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedione and 1,10-phenanthroline

Neutral complexes of composition [LnL3Phen], where Ln = Tm, Dy, and Gd, were synthesized by the reaction of LnCl3 with heterocyclic diketone 1,3-bis(1,3-dimethyl-1H-pyrazol-4-yl)-1,3-propanedi-one (HL, 1) and 1,10-phenanthroline in an aqueous alcohol solution in the presence of NaOH. The composition of the complexes was proved by elemental analysis. Their optical and luminescence properties were studied. © Pleiades Publishing, Ltd., 2012

Synthesis and crystal structure of the Tb(III) complex with 1,3-Bis(1,3-dimethyl-1 H-pyrazol-4-yl)-1,3-propanedione and 1,10-phenanthroline

The reaction of Tb(NO 3) 3 · 6H 2O with 1,3-bis(1,3-dimethyl-1 H-pyrazol-4-yl)-1,3-propanedione (HL) and 1,10-phenanthroline (Phen) in the presence of NaOH in a water-alcohol medium afforded the neutral complex [Tb(L) 3(Phen)] (I). The unstable adduct [Tb(L) 3(Phen)] • 0.4 MeCN (II), whose structure is studied by X-ray diffraction analysis, is obtained from an acetonitrile solution. The crystals of compound II at 100 K are triclinic, a = 11.2508(13), b = 11.4246(14), c = 22.486(3) Å, α = 96.522(2)°, β = 91.578(2)°, γ = 110.073(2)°, V = 2690.3(5) Å 3, space group P1, Z = 2, R = 0.0433. The complex is characterized by the green luminescence (λ exc = 380 nm, λ em = 550 nm). © Pleiades Publishing, Ltd., 2012

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

Anionic complex Cs+[EuL4]- (I) is synthesized by the reaction of Eu(NO3)3 · 6H 2O 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. © 2013 Pleiades Publishing, Ltd