A direct method of obtaining complexes of cobalt with respect to rare earth elements is reported. The total of 14 new compounds which are insoluble in water and general organic media have been synthesized by the react...A direct method of obtaining complexes of cobalt with respect to rare earth elements is reported. The total of 14 new compounds which are insoluble in water and general organic media have been synthesized by the reaction of RE（Ac）<sub>3</sub>·XH<sub>2</sub>O （RE=rare earth elements except for Ce, Pm; X=2, 5, 8） with [H<sub>6</sub>CO<sub>2</sub>（Gc）<sub>5</sub>CS<sub>2</sub>] （Gc=<sup>-</sup>S<sub>2</sub>CNHCH<sub>2</sub>CO<sub>2</sub><sup>-</sup>） in acetone/ water at room temperature. The complexes having the general formula, [RE<sub>2</sub>Co<sub>2</sub>（Gc）<sub>5</sub>HAcCS<sub>2</sub>·XH<sub>2</sub>O], were characterized by elemental analyses, infrared spectra, DSC and TGA.展开更多
Six compounds of the general formula [Ln(pfpr)3]2(NITPhOMe).nH2O, where Ln=Nd, Gd, Dy, Ho, Er, Y, pfpr=pentafluoropropionate, NITPhOMe=2-(4'-methoxyphenyl)-4,4,5, 5-tetra-methylimidazoline-1-oxyl-3-oxide, and n=4 ...Six compounds of the general formula [Ln(pfpr)3]2(NITPhOMe).nH2O, where Ln=Nd, Gd, Dy, Ho, Er, Y, pfpr=pentafluoropropionate, NITPhOMe=2-(4'-methoxyphenyl)-4,4,5, 5-tetra-methylimidazoline-1-oxyl-3-oxide, and n=4 (for Nd, Dy, Er); 3 (for Gd); 6 (for Ho); 5 (for Y), have been synthesized. These complexes were characterized by elemental analyses, IR, electronic spectra and molar conductances. The variable temperature (4-300 K) magnetic susceptibility of the complex [Gd(pfpr)3]2(NITPhOMe).3H2O was determined. The observed susceptibility data were fit to those from theoretical magnetic equation by least-squares method. The exchange integral, J, was found to be equal to 2.14 cm-1. This indicates a weak ferromagnetic spin-exchange interaction between the radical and the gadolinium(III) ion.展开更多
Eleven homobinuclear macrocyclic rare earth metal ions complexes are obtained as com-pounds of 2:2 Schiff base formed by condensing 2,6-diformyl-4-tert-Butylphenol and triethy-lenetetramine by a template procedure usi...Eleven homobinuclear macrocyclic rare earth metal ions complexes are obtained as com-pounds of 2:2 Schiff base formed by condensing 2,6-diformyl-4-tert-Butylphenol and triethy-lenetetramine by a template procedure using rare earth metal isothiocyanates. These complexesare characterized by elemental analyses, FABMS, IR, conductivity and magnetic susceptibility.The variable-temperature magnetic susceptibility (4--300K) of complexes of Gd(Ⅲ) and Tb(Ⅲ) has been determined. A satisfactory fit to theoretical curve derived from spin Hamil-tonian operator was obtained by least squares method. The exchange interaction parameters areJ =-0.220 cm^(-1) for Gd, ,ZJ~?=-0.052 cm^(-1) for Tb. The results indicate a very weak anti-ferromagnetic interaction between Gd^(3+)-Gd^(3+), Tb^(3+)-Tb^(3+) ions.展开更多
合成了系列钆钐双核稀土有机配合物Gdx Sm1- x （TTA）3phen（x＝0～0．9）．红外光谱（IR）、X射线衍射（XRD）、热重（TG）结果推测了配合物可能的分子结构；紫外可见光谱（U V／vis ）结果表明，该系列稀土有机配合物能有效的吸收紫...合成了系列钆钐双核稀土有机配合物Gdx Sm1- x （TTA）3phen（x＝0～0．9）．红外光谱（IR）、X射线衍射（XRD）、热重（TG）结果推测了配合物可能的分子结构；紫外可见光谱（U V／vis ）结果表明，该系列稀土有机配合物能有效的吸收紫外光，吸收峰主要来自于有机配体TTA和phen（270 nm和351 nm处）；荧光光谱（FS）结果表明，Gd3＋对于Sm3＋具有荧光增效，当Gd3＋的摩尔分数为0．6时，Gd0．6Sm0．4（TTA）3phen类配合物的特征荧光（562 nm ，596 n m和643 n m处）强度均达到最大．展开更多
A new binuclear cage-like complex, [Eu2(TCM)2(DMSO)6]·2DMSO, was synthesized via the reaction of H3TCM(H3TCM={2,4,6-tris[(2-carboxyphenoxy)methyl]-1,3,5-trimethylbenzene}) and Eu3+. Single crystal X-ray diffracti...A new binuclear cage-like complex, [Eu2(TCM)2(DMSO)6]·2DMSO, was synthesized via the reaction of H3TCM(H3TCM={2,4,6-tris[(2-carboxyphenoxy)methyl]-1,3,5-trimethylbenzene}) and Eu3+. Single crystal X-ray diffraction study reveals a centro symmetric binuclear neutral entity, space group P21/c with a=1.5188(2) nm, b=1.7135(3) nm, c=1.7578(2) nm, β=95.34(2)°, V=4.5549(9) nm3, Z=4. In the complex, Eu3+ metal centers are bridged together by mono- and bidentate carboxylate groups from two ligands. The most interesting fact is that the size of solvent molecules has a great influence on the binuclear cage-like complex in the shape of binuclear cage, the coordination mode of carboxylate group and the coordination number of Eu3+.展开更多
文摘A direct method of obtaining complexes of cobalt with respect to rare earth elements is reported. The total of 14 new compounds which are insoluble in water and general organic media have been synthesized by the reaction of RE（Ac）<sub>3</sub>·XH<sub>2</sub>O （RE=rare earth elements except for Ce, Pm; X=2, 5, 8） with [H<sub>6</sub>CO<sub>2</sub>（Gc）<sub>5</sub>CS<sub>2</sub>] （Gc=<sup>-</sup>S<sub>2</sub>CNHCH<sub>2</sub>CO<sub>2</sub><sup>-</sup>） in acetone/ water at room temperature. The complexes having the general formula, [RE<sub>2</sub>Co<sub>2</sub>（Gc）<sub>5</sub>HAcCS<sub>2</sub>·XH<sub>2</sub>O], were characterized by elemental analyses, infrared spectra, DSC and TGA.
基金Project supported by the National Natural Science Foundation of China and the State Education Commission Foundation of China.
文摘Six compounds of the general formula [Ln(pfpr)3]2(NITPhOMe).nH2O, where Ln=Nd, Gd, Dy, Ho, Er, Y, pfpr=pentafluoropropionate, NITPhOMe=2-(4'-methoxyphenyl)-4,4,5, 5-tetra-methylimidazoline-1-oxyl-3-oxide, and n=4 (for Nd, Dy, Er); 3 (for Gd); 6 (for Ho); 5 (for Y), have been synthesized. These complexes were characterized by elemental analyses, IR, electronic spectra and molar conductances. The variable temperature (4-300 K) magnetic susceptibility of the complex [Gd(pfpr)3]2(NITPhOMe).3H2O was determined. The observed susceptibility data were fit to those from theoretical magnetic equation by least-squares method. The exchange integral, J, was found to be equal to 2.14 cm-1. This indicates a weak ferromagnetic spin-exchange interaction between the radical and the gadolinium(III) ion.
基金Project supported by the National Natural Science Foundation of China.
文摘Eleven homobinuclear macrocyclic rare earth metal ions complexes are obtained as com-pounds of 2:2 Schiff base formed by condensing 2,6-diformyl-4-tert-Butylphenol and triethy-lenetetramine by a template procedure using rare earth metal isothiocyanates. These complexesare characterized by elemental analyses, FABMS, IR, conductivity and magnetic susceptibility.The variable-temperature magnetic susceptibility (4--300K) of complexes of Gd(Ⅲ) and Tb(Ⅲ) has been determined. A satisfactory fit to theoretical curve derived from spin Hamil-tonian operator was obtained by least squares method. The exchange interaction parameters areJ =-0.220 cm^(-1) for Gd, ,ZJ~?=-0.052 cm^(-1) for Tb. The results indicate a very weak anti-ferromagnetic interaction between Gd^(3+)-Gd^(3+), Tb^(3+)-Tb^(3+) ions.
文摘合成了系列钆钐双核稀土有机配合物Gdx Sm1- x （TTA）3phen（x＝0～0．9）．红外光谱（IR）、X射线衍射（XRD）、热重（TG）结果推测了配合物可能的分子结构；紫外可见光谱（U V／vis ）结果表明，该系列稀土有机配合物能有效的吸收紫外光，吸收峰主要来自于有机配体TTA和phen（270 nm和351 nm处）；荧光光谱（FS）结果表明，Gd3＋对于Sm3＋具有荧光增效，当Gd3＋的摩尔分数为0．6时，Gd0．6Sm0．4（TTA）3phen类配合物的特征荧光（562 nm ，596 n m和643 n m处）强度均达到最大．
文摘A new binuclear cage-like complex, [Eu2(TCM)2(DMSO)6]·2DMSO, was synthesized via the reaction of H3TCM(H3TCM={2,4,6-tris[(2-carboxyphenoxy)methyl]-1,3,5-trimethylbenzene}) and Eu3+. Single crystal X-ray diffraction study reveals a centro symmetric binuclear neutral entity, space group P21/c with a=1.5188(2) nm, b=1.7135(3) nm, c=1.7578(2) nm, β=95.34(2)°, V=4.5549(9) nm3, Z=4. In the complex, Eu3+ metal centers are bridged together by mono- and bidentate carboxylate groups from two ligands. The most interesting fact is that the size of solvent molecules has a great influence on the binuclear cage-like complex in the shape of binuclear cage, the coordination mode of carboxylate group and the coordination number of Eu3+.
