The novel dinuclear copper(Ⅱ) complex with with N (2,4 dihydroxybenzalidene) o aminobenzoic acid ligand, [Cu(C14H9NO4)]2· 2H2O, has been synthesized and characterized by elemental analysis, IR, UV Vis and therma...The novel dinuclear copper(Ⅱ) complex with with N (2,4 dihydroxybenzalidene) o aminobenzoic acid ligand, [Cu(C14H9NO4)]2· 2H2O, has been synthesized and characterized by elemental analysis, IR, UV Vis and thermal analysis. Its crystal structure was determined by single crystal X ray diffraction techniques. The crystal belongs to monoclinic with space group P21/c. The cell parameters are: a=0.82510(11)nm, b=0.68870(9)nm, c=2.3007(3)nm, β =100.847(2)° , V=1.2840(3)nm3, Z=2, Dc=1.742Mg· m- 3, μ (MoKα )=1.723mm- 1, F(000)=684. The structure was refined to final R1=0.0267, wR2=0.0735. The complex molecule structure has dinuclear centrosymmetric dimeric structure in which a planar Cu2O2 core features. The ligand N (2,4 dihydroxybenzalidene) o aminobenzoic acid dianion is μ 2 tridentate, chelating one copper? ion via one nitrogen, one hydroxy oxygen atom and one carboxylate oxygen atom, and the hydroxy oxygen atom simultaneously coordinates to the other copper? ion of the dimer. In the structure the copper? ion rendered four coordination in a distorted square planar geometry structure. CCDC: 212695.展开更多
The full optimized molecular geometries of 2,4 dihydroxybenzaldehyde thiocarbohydrazone(H2L) and its comp lexes ML(M=Cu?, Zn? and Ni?) were calculated at HF/3 21G, HF/6 31G(d) and B3LYP/6 31G level with Gaussian 98W p...The full optimized molecular geometries of 2,4 dihydroxybenzaldehyde thiocarbohydrazone(H2L) and its comp lexes ML(M=Cu?, Zn? and Ni?) were calculated at HF/3 21G, HF/6 31G(d) and B3LYP/6 31G level with Gaussian 98W program. The geometries of the full optimized for them are all Cs symmetry. Thetheoretical analyses of some of their properties such as bond energy,coordination and biological activity were also made. The biological activity effect is CuL>ZnL >NiL >H2L, which agrees well with the experimental result.展开更多
Solubilities of 4-hydroxybenzaldehyde, 3-bromo-4-hydroxybenzaldehyde, 3,5 -dibromo-4-hydroxybenzaldehyde in chloroform were measured at temperatures ranging from 283.15 K to 323.15 K.The measurements of temperature an...Solubilities of 4-hydroxybenzaldehyde, 3-bromo-4-hydroxybenzaldehyde, 3,5 -dibromo-4-hydroxybenzaldehyde in chloroform were measured at temperatures ranging from 283.15 K to 323.15 K.The measurements of temperature and enthalpy of fusion of pure solutes were used for caculation of solubility by ideal solution model,which was higher than the experimental values.The very low solubility in chloroform was due to self association of solute molecules.A λh formula was used to fit the data and had shown good correlation results.展开更多
文摘The novel dinuclear copper(Ⅱ) complex with with N (2,4 dihydroxybenzalidene) o aminobenzoic acid ligand, [Cu(C14H9NO4)]2· 2H2O, has been synthesized and characterized by elemental analysis, IR, UV Vis and thermal analysis. Its crystal structure was determined by single crystal X ray diffraction techniques. The crystal belongs to monoclinic with space group P21/c. The cell parameters are: a=0.82510(11)nm, b=0.68870(9)nm, c=2.3007(3)nm, β =100.847(2)° , V=1.2840(3)nm3, Z=2, Dc=1.742Mg· m- 3, μ (MoKα )=1.723mm- 1, F(000)=684. The structure was refined to final R1=0.0267, wR2=0.0735. The complex molecule structure has dinuclear centrosymmetric dimeric structure in which a planar Cu2O2 core features. The ligand N (2,4 dihydroxybenzalidene) o aminobenzoic acid dianion is μ 2 tridentate, chelating one copper? ion via one nitrogen, one hydroxy oxygen atom and one carboxylate oxygen atom, and the hydroxy oxygen atom simultaneously coordinates to the other copper? ion of the dimer. In the structure the copper? ion rendered four coordination in a distorted square planar geometry structure. CCDC: 212695.
文摘The full optimized molecular geometries of 2,4 dihydroxybenzaldehyde thiocarbohydrazone(H2L) and its comp lexes ML(M=Cu?, Zn? and Ni?) were calculated at HF/3 21G, HF/6 31G(d) and B3LYP/6 31G level with Gaussian 98W program. The geometries of the full optimized for them are all Cs symmetry. Thetheoretical analyses of some of their properties such as bond energy,coordination and biological activity were also made. The biological activity effect is CuL>ZnL >NiL >H2L, which agrees well with the experimental result.
文摘以鸡腿蘑发酵液中分离获得的具有抑制蛋白质非酶糖基化活性的新物质4,5-二羟基-2-甲氧基苯甲醛为对象,建立检测鸡腿蘑发酵液中该物质的高效液相色谱方法.其回归方程为Y=675.42X-943.39(r2=0.999 0),线性范围为1.23～123 mg/L.该方法的日内和日间精度分别为1.5%～5.6%,2.5%～4.6%,回收率为93.8%～96.6%.该方法能够在20 m in内完成一次分析,具有快速、准确、可靠的特点.
文摘Solubilities of 4-hydroxybenzaldehyde, 3-bromo-4-hydroxybenzaldehyde, 3,5 -dibromo-4-hydroxybenzaldehyde in chloroform were measured at temperatures ranging from 283.15 K to 323.15 K.The measurements of temperature and enthalpy of fusion of pure solutes were used for caculation of solubility by ideal solution model,which was higher than the experimental values.The very low solubility in chloroform was due to self association of solute molecules.A λh formula was used to fit the data and had shown good correlation results.
