The self-assembly of 5-bromoisophthalic acid （H2BIPA） with Tb（NO3）3·6H2O under hydrothermal conditions gives rise to a 3D coordination polymer, [Tb2（BIPA）3（CH3CH2OH）]n （1）, which was characterized by el...The self-assembly of 5-bromoisophthalic acid （H2BIPA） with Tb（NO3）3·6H2O under hydrothermal conditions gives rise to a 3D coordination polymer, [Tb2（BIPA）3（CH3CH2OH）]n （1）, which was characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal is of monoclinic system, space group P21/c with a = 19.2591（17）, b = 8.2537（7）, c = 18.5663（17）, β = 104.4720（10）°, V = 2857.6（4）3, C26H15Br3O13Tb2, Mr = 1092.95, Dc = 2.540 g/cm3, F（000） = 2040, μ = 9.173 mm-1 and Z = 4. The final R = 0.0324 and wR = 0.0767 for 5299 observed reflections （I 〉 2σ（I））. Complex 1 displays an unusual three-dimensional （4,6）-connected network with （48.66.8）2（44.62）2（42.84） topology, which is different from [Tb（HBDC）（BDC）（H2O）4]·3.3H2O （BDC = isophthalate） because the -Br substituent of isophthalate results in different electronic effect and steric hindrance to change the coordination modes of carboxylate groups in the assembly process. Moreover, luminescent properties of 1 have also been investigated in the solid state.展开更多
Study on the extraction and separation of rare earth with new extractants is important in the rare earth chemistry and hydrometallurgy.In this work,the extraction behavior of TBMA employing n hexane 20% n octanol,benz...Study on the extraction and separation of rare earth with new extractants is important in the rare earth chemistry and hydrometallurgy.In this work,the extraction behavior of TBMA employing n hexane 20% n octanol,benzene and toluene as diluents toward Tb(Ⅲ) has been investigated.The effect of the concentrations of nitric acid,lithium nitrate and extractant and also the temperature on the extraction distribution ratio has been studied in different diluents.The stoichiometry of the extracted species of Tb(Ⅲ) conforms to be Tb(NO 3) 3·3TBMA.An attempt has been made to determine the structure of the extracted species based on the data of IR and mole展开更多
A dinuclear Tb（Ⅲ） compound, Tb_2（μ_2-anthc）_4（anthc）_2（1,10-phen）_2（1, Hanthc = 9-anthracenecarboxylic acid and 1,10-phen = 1,10-phenanthroline）, was synthesized under solvothermal condition and structural...A dinuclear Tb（Ⅲ） compound, Tb_2（μ_2-anthc）_4（anthc）_2（1,10-phen）_2（1, Hanthc = 9-anthracenecarboxylic acid and 1,10-phen = 1,10-phenanthroline）, was synthesized under solvothermal condition and structurally characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic system, space group P1, with a = 12.5061（12）, b = 13.3168（10）, c = 15.0079（12） ？, α = 110.620（7）, β = 102.941（7）, γ = 107.036（7）o, V = 2081.8（3） ？~3, Z = 1, C_（114）H_（70）N_4O_（12）Tb_2, M_r = 2005.58, D_c = 1.600 g/cm^3, μ = 1.759 mm^（-1）, F（000） = 1008, the final R = 0.0294 and w R = 0.0608 for 8900 observed reflections with I 〉 2s（I）. In compound 1, two Tb（Ⅲ） ions are linked by four carboxylate groups of the bridging anthc– ligands to give a dinuclear Tb_2（μ_2-anthc）_4 unit wherein each Tb（III） ion is further capped by a terminal anthc– ligand and a 1,10-phen ligand in a chelating fashion. Detailed direct-current and alternating-current susceptibility measurements showed no slow magnetism relaxation phenomenon was observed for 1.展开更多
The thermal behavior of [Tb_2( m -MBA)_6(phen)_2](H_2O)_2( m -MBA=C_8H_7O_2, methoxybenzoate; phen=C_ 12 H_8N_2, 1,10-phenanthroline) in static air atmosphere was investigated by means of TG-DTG and DTA methods. The...The thermal behavior of [Tb_2( m -MBA)_6(phen)_2](H_2O)_2( m -MBA=C_8H_7O_2, methoxybenzoate; phen=C_ 12 H_8N_2, 1,10-phenanthroline) in static air atmosphere was investigated by means of TG-DTG and DTA methods. The thermal decomposition of the title compound takes place mainly in two steps. The intermediate and the residue for each decomposition were identified by the TG curve. By the kinetic method of processing thermal analysis data put forward by Malek et al ., it is defined that the kinetics model for the first-step thermal decomposition is SB( m,n ).展开更多
A new aryl amide type tetrapodal ligand L (1, 1, 1, 1 tetrakis-{[(2 benzylaminoformyl) phenoxyl]methyl}methane) and its europium and terbium nitrate complexes were synthesized. The luminescence properties of these c...A new aryl amide type tetrapodal ligand L (1, 1, 1, 1 tetrakis-{[(2 benzylaminoformyl) phenoxyl]methyl}methane) and its europium and terbium nitrate complexes were synthesized. The luminescence properties of these complexes were also studied.展开更多
The stability constants and species distributions of complexes of two lanthanide ions, Eu（Ⅲ） and Tb（Ⅲ）, with a macrocyclic ligand, BDBPH, in 1：1 and 2：lsystem, were determined potentiometrically at 25.0 ℃ and...The stability constants and species distributions of complexes of two lanthanide ions, Eu（Ⅲ） and Tb（Ⅲ）, with a macrocyclic ligand, BDBPH, in 1：1 and 2：lsystem, were determined potentiometrically at 25.0 ℃ and I=0.100 mol L^-l. The two metal ions could form deprotonated mono- or dinuclear complexes with BDBPH after the first two protons of the ligand completely neutralized. At higher pH values, Eu（Ⅲ） could not form hydroxy complexes with BDBPH, while Tb（Ⅲ） could form hydroxy complexes in the type of M2L（OH）, M2L（OH）2, and M2L（OH）3.展开更多
基金Supported by the National Natural Science Foundation of China (No. 20971004)the Key Project of Chinese Ministry of Education (No. 210102)
文摘The self-assembly of 5-bromoisophthalic acid （H2BIPA） with Tb（NO3）3·6H2O under hydrothermal conditions gives rise to a 3D coordination polymer, [Tb2（BIPA）3（CH3CH2OH）]n （1）, which was characterized by elemental analysis, IR and single-crystal X-ray diffraction. The crystal is of monoclinic system, space group P21/c with a = 19.2591（17）, b = 8.2537（7）, c = 18.5663（17）, β = 104.4720（10）°, V = 2857.6（4）3, C26H15Br3O13Tb2, Mr = 1092.95, Dc = 2.540 g/cm3, F（000） = 2040, μ = 9.173 mm-1 and Z = 4. The final R = 0.0324 and wR = 0.0767 for 5299 observed reflections （I 〉 2σ（I））. Complex 1 displays an unusual three-dimensional （4,6）-connected network with （48.66.8）2（44.62）2（42.84） topology, which is different from [Tb（HBDC）（BDC）（H2O）4]·3.3H2O （BDC = isophthalate） because the -Br substituent of isophthalate results in different electronic effect and steric hindrance to change the coordination modes of carboxylate groups in the assembly process. Moreover, luminescent properties of 1 have also been investigated in the solid state.
文摘Study on the extraction and separation of rare earth with new extractants is important in the rare earth chemistry and hydrometallurgy.In this work,the extraction behavior of TBMA employing n hexane 20% n octanol,benzene and toluene as diluents toward Tb(Ⅲ) has been investigated.The effect of the concentrations of nitric acid,lithium nitrate and extractant and also the temperature on the extraction distribution ratio has been studied in different diluents.The stoichiometry of the extracted species of Tb(Ⅲ) conforms to be Tb(NO 3) 3·3TBMA.An attempt has been made to determine the structure of the extracted species based on the data of IR and mole
基金Supported by the National Natural Science Foundation of China(No.21361011 and 21101081)Science Founds of State Key Laboratory of Structural Chemistry(20130011)
文摘A dinuclear Tb（Ⅲ） compound, Tb_2（μ_2-anthc）_4（anthc）_2（1,10-phen）_2（1, Hanthc = 9-anthracenecarboxylic acid and 1,10-phen = 1,10-phenanthroline）, was synthesized under solvothermal condition and structurally characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic system, space group P1, with a = 12.5061（12）, b = 13.3168（10）, c = 15.0079（12） ？, α = 110.620（7）, β = 102.941（7）, γ = 107.036（7）o, V = 2081.8（3） ？~3, Z = 1, C_（114）H_（70）N_4O_（12）Tb_2, M_r = 2005.58, D_c = 1.600 g/cm^3, μ = 1.759 mm^（-1）, F（000） = 1008, the final R = 0.0294 and w R = 0.0608 for 8900 observed reflections with I 〉 2s（I）. In compound 1, two Tb（Ⅲ） ions are linked by four carboxylate groups of the bridging anthc– ligands to give a dinuclear Tb_2（μ_2-anthc）_4 unit wherein each Tb（III） ion is further capped by a terminal anthc– ligand and a 1,10-phen ligand in a chelating fashion. Detailed direct-current and alternating-current susceptibility measurements showed no slow magnetism relaxation phenomenon was observed for 1.
基金Supported by the Natural Science Foundation of Hebei Province(No.2 0 2 140 ) and Hebei Education Departm ent(No.2 0 0 112 1)
文摘The thermal behavior of [Tb_2( m -MBA)_6(phen)_2](H_2O)_2( m -MBA=C_8H_7O_2, methoxybenzoate; phen=C_ 12 H_8N_2, 1,10-phenanthroline) in static air atmosphere was investigated by means of TG-DTG and DTA methods. The thermal decomposition of the title compound takes place mainly in two steps. The intermediate and the residue for each decomposition were identified by the TG curve. By the kinetic method of processing thermal analysis data put forward by Malek et al ., it is defined that the kinetics model for the first-step thermal decomposition is SB( m,n ).
文摘A new aryl amide type tetrapodal ligand L (1, 1, 1, 1 tetrakis-{[(2 benzylaminoformyl) phenoxyl]methyl}methane) and its europium and terbium nitrate complexes were synthesized. The luminescence properties of these complexes were also studied.
文摘The stability constants and species distributions of complexes of two lanthanide ions, Eu（Ⅲ） and Tb（Ⅲ）, with a macrocyclic ligand, BDBPH, in 1：1 and 2：lsystem, were determined potentiometrically at 25.0 ℃ and I=0.100 mol L^-l. The two metal ions could form deprotonated mono- or dinuclear complexes with BDBPH after the first two protons of the ligand completely neutralized. At higher pH values, Eu（Ⅲ） could not form hydroxy complexes with BDBPH, while Tb（Ⅲ） could form hydroxy complexes in the type of M2L（OH）, M2L（OH）2, and M2L（OH）3.
