An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of t...An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.展开更多
Novel tetranuclear copper complexes,Cu4(OH)2(ClO4)3 (HA).H2O(1)and Cu4(ClO4)5(H3B).3H2O(2),were synthesized by reacting 1,5-bis(1'-phenyl-3'-methyl-5'-pyrazolone-4')-1,5--pentanedione with 1,3-propaned...Novel tetranuclear copper complexes,Cu4(OH)2(ClO4)3 (HA).H2O(1)and Cu4(ClO4)5(H3B).3H2O(2),were synthesized by reacting 1,5-bis(1'-phenyl-3'-methyl-5'-pyrazolone-4')-1,5--pentanedione with 1,3-propanediamine and 2-hydroxyl-1,3-propanediamine in the presence of a template reagent copper ion ,New[2+2] type open cyclic multidentate ligands are also obtained from the reaction(H4A) and H6B stand for new compounds from 1,3-propanediamine and 2-hydroxyl-1,3-propanediamine,respectively),They each contain five C=O ,three C=N and one NH2 group[s,The complexes were characterized by elemental analyses,conductivity,FR-i.r.electronic spectra and extended X-ray absorption fine structure(EXAFS),Copper ions in (1) are basically four coordinate with tetragonal geometry.The average coordination bond distances of Cu-N and Cu-O are 1.91 A and 2.05A .In(2).copper ions are primarily five coordinate with square-based pyramidal geometry.The average coordination bond distances of Cu-N and Cu-O are 1.93 A and 2.08 A.Four copper atoms in molecules may be arranged tetragonally.Both the ligand field and the coordination bonds in complex(1) are stronger than those in(2).Investigations on variable temperature susceptibilities show that some antiferromagnetic exchange interaction exist in the complexes,The plots of x-1 versus T obey the Curie-Weiss law only at low temperature.Preliminary results of a bioassay indicate that the two complexes have some antitumour activity in vitro.展开更多
Four 3d-4f heterometallic complexes, [CuⅡ-LnⅢ(bpt)2(NO3)3(MeOH)] (Ln = Gd, 1; Dy, 2; bptH = 3,5-bis(pyrid-2-yl)-l,2,4- triazole), [CuⅡ-LnⅢ(μ-OH)2(bpt)4C14 (H2O)2]·6H2O (Ln = Gd, 3; Dy, 4), have been synthesi...Four 3d-4f heterometallic complexes, [CuⅡ-LnⅢ(bpt)2(NO3)3(MeOH)] (Ln = Gd, 1; Dy, 2; bptH = 3,5-bis(pyrid-2-yl)-l,2,4- triazole), [CuⅡ-LnⅢ(μ-OH)2(bpt)4C14 (H2O)2]·6H2O (Ln = Gd, 3; Dy, 4), have been synthesized under solvothermal condi- tions. X-ray structural analyses reveal that 1 and 2 are isostructural while 3 and 4 are isostructural. In each complex, the copper and gadolinium or dysprosium ions are linked by two triazolate bridges and form a CuⅡ-LnⅢ dinuclear unit. The intramolecu- lar Cu-Ln distances are 4.542, 4.525, 4.545 and 4.538 ] for 1, 2, 3 and 4, respectively. Two dinuclear CuLn units are bridged by two OH- groups into the zig-zag tetranuclear {cunzLnm2} structures with the Ln(Ⅲ)...Ln(Ⅲ) distances of 3.742 and 3.684 for 3 and 4, respectively. Magnetic studies show that the antiferromagnetic CulI-Lnm interactions occur in 1 (Jcu = -0,21 cm-1) and 2. The antiferromagnetic interaction occurs in complex 3 with JcuGa = -0.82 cm-1 and JcdGd = --0.065 cm-1, while domi- nant ferromagnetic interaction occurs in complex 4.展开更多
文摘An O-Vanillin-methionine Schiff Base complex with copper(Ⅱ) has been synthesized under a mild condition. The complex has been characterized by elemental analysis, UV, FT-IR, TG-DTA and XRD. The crystal structure of the complex belongs to monoclinic, with space group C2/C, a=2.070 4(12) nm, b=1.431 9(8) nm, c=2.812 9(11) nm, β=133.15(2)°, V=6.084(5) nm 3, Z=8, D c= 0.998 Mg/m 3, F(000)=1 836, final R=0.121 8. The results revealed it is a tetranuclear copper(Ⅱ) complex.
文摘Novel tetranuclear copper complexes,Cu4(OH)2(ClO4)3 (HA).H2O(1)and Cu4(ClO4)5(H3B).3H2O(2),were synthesized by reacting 1,5-bis(1'-phenyl-3'-methyl-5'-pyrazolone-4')-1,5--pentanedione with 1,3-propanediamine and 2-hydroxyl-1,3-propanediamine in the presence of a template reagent copper ion ,New[2+2] type open cyclic multidentate ligands are also obtained from the reaction(H4A) and H6B stand for new compounds from 1,3-propanediamine and 2-hydroxyl-1,3-propanediamine,respectively),They each contain five C=O ,three C=N and one NH2 group[s,The complexes were characterized by elemental analyses,conductivity,FR-i.r.electronic spectra and extended X-ray absorption fine structure(EXAFS),Copper ions in (1) are basically four coordinate with tetragonal geometry.The average coordination bond distances of Cu-N and Cu-O are 1.91 A and 2.05A .In(2).copper ions are primarily five coordinate with square-based pyramidal geometry.The average coordination bond distances of Cu-N and Cu-O are 1.93 A and 2.08 A.Four copper atoms in molecules may be arranged tetragonally.Both the ligand field and the coordination bonds in complex(1) are stronger than those in(2).Investigations on variable temperature susceptibilities show that some antiferromagnetic exchange interaction exist in the complexes,The plots of x-1 versus T obey the Curie-Weiss law only at low temperature.Preliminary results of a bioassay indicate that the two complexes have some antitumour activity in vitro.
基金supported by the National Natural Science Foundation of China (91122032, 90922009, 21121061)the National Basic Research Program of China (2012CB821704)
文摘Four 3d-4f heterometallic complexes, [CuⅡ-LnⅢ(bpt)2(NO3)3(MeOH)] (Ln = Gd, 1; Dy, 2; bptH = 3,5-bis(pyrid-2-yl)-l,2,4- triazole), [CuⅡ-LnⅢ(μ-OH)2(bpt)4C14 (H2O)2]·6H2O (Ln = Gd, 3; Dy, 4), have been synthesized under solvothermal condi- tions. X-ray structural analyses reveal that 1 and 2 are isostructural while 3 and 4 are isostructural. In each complex, the copper and gadolinium or dysprosium ions are linked by two triazolate bridges and form a CuⅡ-LnⅢ dinuclear unit. The intramolecu- lar Cu-Ln distances are 4.542, 4.525, 4.545 and 4.538 ] for 1, 2, 3 and 4, respectively. Two dinuclear CuLn units are bridged by two OH- groups into the zig-zag tetranuclear {cunzLnm2} structures with the Ln(Ⅲ)...Ln(Ⅲ) distances of 3.742 and 3.684 for 3 and 4, respectively. Magnetic studies show that the antiferromagnetic CulI-Lnm interactions occur in 1 (Jcu = -0,21 cm-1) and 2. The antiferromagnetic interaction occurs in complex 3 with JcuGa = -0.82 cm-1 and JcdGd = --0.065 cm-1, while domi- nant ferromagnetic interaction occurs in complex 4.
