Dinuclear copper complex with biradical, [Cu(hfac) 2] 2PhBNOM\[PhBNOM=2,5 bimethoxyl 1,4 bis(4,4,5,5 tetramethyllimidazoline 1 oxyl 3 oxide)phenyl, hfac=hexafluoroacetylacetonate], has been synthesized and characteriz...Dinuclear copper complex with biradical, [Cu(hfac) 2] 2PhBNOM\[PhBNOM=2,5 bimethoxyl 1,4 bis(4,4,5,5 tetramethyllimidazoline 1 oxyl 3 oxide)phenyl, hfac=hexafluoroacetylacetonate], has been synthesized and characterized. It crystallized in the monoclinic system; space group C2/c with a = \{1\^877 3(8)\} nm, b =1.359 8(5) nm, c =2.237 1(7) nm, β =97.24(3)°, Z =4, R = 0.096 1 , R w=0 094 4 .展开更多
Two Cu(Ⅱ) complexes with title Schiff base ligand H 2L, micro crystal Cu(HL)ClO 4·H 2O and single crystal , have been synthesized and characterized by IR spectra, etc .. By cyclic voltammetry, a quasi reversible...Two Cu(Ⅱ) complexes with title Schiff base ligand H 2L, micro crystal Cu(HL)ClO 4·H 2O and single crystal , have been synthesized and characterized by IR spectra, etc .. By cyclic voltammetry, a quasi reversible electron transferring process has been shown in Cu(Ⅱ)/Cu(Ⅰ) couples reaction of ; the given value E 0 1/2 =-0.73 V has been estimated. The structure of has been determined by X ray diffraction with R =0.036. The results indicate that the deprotonic ligand, as a practically tetradentate, coordinates only with its two imino and two phenoxo groups to form a D 2d symmetric geometry. Two different torsional modes of the homologous ligands, occurring in mono and di nuclear Cu(Ⅱ) complexes, respectively, have been contrasted and discussed.展开更多
A new Schiff base, 2 hydroxy 1 napthaldehyde 2 amino thiazole(HNATS) and its Cu(Ⅱ) complex was synthesized. The complex[Cu(Ⅱ) (HNATS) 2] could exhibit an efficient peroxitase like catalytic activity, and catalyze th...A new Schiff base, 2 hydroxy 1 napthaldehyde 2 amino thiazole(HNATS) and its Cu(Ⅱ) complex was synthesized. The complex[Cu(Ⅱ) (HNATS) 2] could exhibit an efficient peroxitase like catalytic activity, and catalyze the coupling reaction of 2,4 dichlorophenol and 4 amino antipyrine with hydrogen peroxide. The effect of SDS on the catalytic activity of mimetic enzyme was studied. Based on the reaction, the determination of O ·- 2 by this new spectrophotometric method was developed. The proposed method was used to determine SOD activity of garlic, scallion and onion with satisfactory results.展开更多
Two diphenylamine compoundsdiclofenac copper(II)and clofenamic copper(II)were synthesized.The molecular composition and structure of these analogues of SOD were determined by IR spectrum and elemental analysis. The ...Two diphenylamine compoundsdiclofenac copper(II)and clofenamic copper(II)were synthesized.The molecular composition and structure of these analogues of SOD were determined by IR spectrum and elemental analysis. The SOD like activity of both analogues of SOD and natural SOD were measured by the modification of NBTillumination method in water solution.The results show that these compounds have good SODlike activities.展开更多
文摘Dinuclear copper complex with biradical, [Cu(hfac) 2] 2PhBNOM\[PhBNOM=2,5 bimethoxyl 1,4 bis(4,4,5,5 tetramethyllimidazoline 1 oxyl 3 oxide)phenyl, hfac=hexafluoroacetylacetonate], has been synthesized and characterized. It crystallized in the monoclinic system; space group C2/c with a = \{1\^877 3(8)\} nm, b =1.359 8(5) nm, c =2.237 1(7) nm, β =97.24(3)°, Z =4, R = 0.096 1 , R w=0 094 4 .
文摘Two Cu(Ⅱ) complexes with title Schiff base ligand H 2L, micro crystal Cu(HL)ClO 4·H 2O and single crystal , have been synthesized and characterized by IR spectra, etc .. By cyclic voltammetry, a quasi reversible electron transferring process has been shown in Cu(Ⅱ)/Cu(Ⅰ) couples reaction of ; the given value E 0 1/2 =-0.73 V has been estimated. The structure of has been determined by X ray diffraction with R =0.036. The results indicate that the deprotonic ligand, as a practically tetradentate, coordinates only with its two imino and two phenoxo groups to form a D 2d symmetric geometry. Two different torsional modes of the homologous ligands, occurring in mono and di nuclear Cu(Ⅱ) complexes, respectively, have been contrasted and discussed.
文摘A new Schiff base, 2 hydroxy 1 napthaldehyde 2 amino thiazole(HNATS) and its Cu(Ⅱ) complex was synthesized. The complex[Cu(Ⅱ) (HNATS) 2] could exhibit an efficient peroxitase like catalytic activity, and catalyze the coupling reaction of 2,4 dichlorophenol and 4 amino antipyrine with hydrogen peroxide. The effect of SDS on the catalytic activity of mimetic enzyme was studied. Based on the reaction, the determination of O ·- 2 by this new spectrophotometric method was developed. The proposed method was used to determine SOD activity of garlic, scallion and onion with satisfactory results.
文摘Two diphenylamine compoundsdiclofenac copper(II)and clofenamic copper(II)were synthesized.The molecular composition and structure of these analogues of SOD were determined by IR spectrum and elemental analysis. The SOD like activity of both analogues of SOD and natural SOD were measured by the modification of NBTillumination method in water solution.The results show that these compounds have good SODlike activities.
