One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes i...One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes in a monoclinic system of the space group C2/c with a=2.983 1(5) nm, b=1.527 4(3) nm, c= 1.725 3(4) nm, β=107.68(2)°, V=7.490(3) nm3, Z=8, D c=1.382 g/cm3, F(000)=3 260, R=0.059 3, wR 2=0.132 3, S=0.885. The one-dimensional zigzag chain extents through Cu—CN—Fe—CN—Cu linkages. The adjacent two polymer chains are linked by the O—H……NC hydrogen bonding between [CuL(H 2O) 2] 2+ and [Fe(CN) 6] 3- ions to form hydrophilic channels in which water molecules are included.展开更多
The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction....The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction. It crystallizes in a monoclinic system, the space group P2 1/c , a =0.951 2(2) nm, b =2.010 4(4) nm, c =1.202 5(2) nm, β =98.89(3)°, V =2.271 9(8) nm 3, Z=2, D c=1.599 Mg/m 3 , F (000) = 876 , R =0.059 1, wR =0.173 3, GOF(F)=1.009. The copper(Ⅱ) atom is five coordinated with four nitrogen atoms of the macrocyclic ligand and one nitrogen atom of imidazole. The stepwise stability constants of the 1∶1 and 2∶1 molar ratios of Cu to L and Zn to L complexes were determined by potentiometric titration in KCl supporting electrolyte(0.100 mol/L) at 25 ℃. The results indicated that zinc(Ⅱ) ion can form hydroxide bridged dinuclear complex [Zn 2(OH)L] 3+ , while the copper(Ⅱ) ion can only form dinuclear complex 3+ with macrocyclic ligand.展开更多
The macrocyclic dinuclear copper(Ⅱ) complex Cu\-2LCl\-2·2H\-2O was prepared in anhydrous ethanol, and characterized by means of element analysis, IR.The stepwise stability constants of the 1∶1 and 2∶1 ([Cu]/[L...The macrocyclic dinuclear copper(Ⅱ) complex Cu\-2LCl\-2·2H\-2O was prepared in anhydrous ethanol, and characterized by means of element analysis, IR.The stepwise stability constants of the 1∶1 and 2∶1 ([Cu]/[L]) complexes were determined by potentiometric titration in KCl supporting electrolyte (0 100 mol/L) at 25 ℃.The results indicate that L shows unusual high stability to dinuclear copper(Ⅱ) ions.展开更多
文摘One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes in a monoclinic system of the space group C2/c with a=2.983 1(5) nm, b=1.527 4(3) nm, c= 1.725 3(4) nm, β=107.68(2)°, V=7.490(3) nm3, Z=8, D c=1.382 g/cm3, F(000)=3 260, R=0.059 3, wR 2=0.132 3, S=0.885. The one-dimensional zigzag chain extents through Cu—CN—Fe—CN—Cu linkages. The adjacent two polymer chains are linked by the O—H……NC hydrogen bonding between [CuL(H 2O) 2] 2+ and [Fe(CN) 6] 3- ions to form hydrophilic channels in which water molecules are included.
文摘The macrocyclic ligand(L) and its dinuclear copper(Ⅱ) and zinc(Ⅱ) complexes have been synthesized. The crystal structure of [Cu 2L(Him) 2](ClO 4) 4·2H 2O has been determined by single crystal X ray diffraction. It crystallizes in a monoclinic system, the space group P2 1/c , a =0.951 2(2) nm, b =2.010 4(4) nm, c =1.202 5(2) nm, β =98.89(3)°, V =2.271 9(8) nm 3, Z=2, D c=1.599 Mg/m 3 , F (000) = 876 , R =0.059 1, wR =0.173 3, GOF(F)=1.009. The copper(Ⅱ) atom is five coordinated with four nitrogen atoms of the macrocyclic ligand and one nitrogen atom of imidazole. The stepwise stability constants of the 1∶1 and 2∶1 molar ratios of Cu to L and Zn to L complexes were determined by potentiometric titration in KCl supporting electrolyte(0.100 mol/L) at 25 ℃. The results indicated that zinc(Ⅱ) ion can form hydroxide bridged dinuclear complex [Zn 2(OH)L] 3+ , while the copper(Ⅱ) ion can only form dinuclear complex 3+ with macrocyclic ligand.
文摘The macrocyclic dinuclear copper(Ⅱ) complex Cu\-2LCl\-2·2H\-2O was prepared in anhydrous ethanol, and characterized by means of element analysis, IR.The stepwise stability constants of the 1∶1 and 2∶1 ([Cu]/[L]) complexes were determined by potentiometric titration in KCl supporting electrolyte (0 100 mol/L) at 25 ℃.The results indicate that L shows unusual high stability to dinuclear copper(Ⅱ) ions.
