Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Prel...Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Preliminary biological tests showed that complexes 1（CuL2Cl2（R=CH3）） and 5（ZnL2Cl2（R=n-C3H7）） exhibited a certain weeding activity against wheat and barnyard grass.展开更多
Water-soluble chitosan complex with zinc was prepared from oligomeric chitosana fier oxidative degradation of chitosan. The process of complex formation were followed byUV and IR spectra measurements.
According to the principles of simultaneous equilibrium and aqueous electronic charge neutrality, the complex equilibrium of zinc ammonia and zinc chloride in the system of Zn(Ⅱ) NH 3 NH 4Cl H 2O existing zinc oxide ...According to the principles of simultaneous equilibrium and aqueous electronic charge neutrality, the complex equilibrium of zinc ammonia and zinc chloride in the system of Zn(Ⅱ) NH 3 NH 4Cl H 2O existing zinc oxide has been studied. The solubility rule and high solubility area of zinc oxide were discovered in the system whose zinc solubility is higher than other two ammonium systems, ammonium sulfate and ammonium carbonate. The absolute average error between the experimental values and the theoretically calculated values of zinc equilibrium concentration is 10.77% in aqueous solution of ammonia and ammonium chloride except in pure ammonium chloride solution. It shows that the critical stability constants and the thermodynamic data are believable. [展开更多
The solubility properties of ZnSO4-Met/Phe/His-H2O systems at 25℃ in thewhole concentration range have been investigated by phase equilibrium method, and the corresponding equilibrium diagrams have been constructed. ...The solubility properties of ZnSO4-Met/Phe/His-H2O systems at 25℃ in thewhole concentration range have been investigated by phase equilibrium method, and the corresponding equilibrium diagrams have been constructed. Under the direction of the phase equilibrium result, the compounds of ZnSO4 with Met, Phe and His which are not reported in literatures have been prepared and characterized.展开更多
A metal-organic coordination polymer [ZnE.s（phen）（BDC）2（OH）]2 （phen = 1,10- phenanthroline, BDC = benzene-1,4-dicarboxylic acid） 1 has been hydrothermally synthesized and structurally characterized by single-c...A metal-organic coordination polymer [ZnE.s（phen）（BDC）2（OH）]2 （phen = 1,10- phenanthroline, BDC = benzene-1,4-dicarboxylic acid） 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The complex crystallizes in the triclinic system, space group PI with a = 11.199（2）, b = 11.593（2）, c = 11.865（3）/A, α= 99.330（1）, β = 111.506（1）, γ = 104.804（1）^o, V= 1328.4（5）A^3, Dc= 1.722 g/cm^3, Z = 1, Mr = 1377.82, F（000） = 692,μ（MoKa） = 2.306 mm^-1, S = 1.093, R= 0.0281 and wR = 0.0756 for 4179 observed reflections （I 〉 2σ（/））. The coordination polyhedron around Zn（II） can be described as a tetrahedron, trigonal bipyramid and octahedron. It is worth noting that the crystal structure of 1 is composed of tetranuclear zinc clusters linked by {ZnO6} units.展开更多
A zinc complex, [Zn(iso)_2(H_2O)_4](iso=C_6H_4NO_2^-), was synthesized and characterized by elemental analysis, thermal analysis and IR spectrum studies. The crystal structure of the complex was determined by X-ray di...A zinc complex, [Zn(iso)_2(H_2O)_4](iso=C_6H_4NO_2^-), was synthesized and characterized by elemental analysis, thermal analysis and IR spectrum studies. The crystal structure of the complex was determined by X-ray diffraction. The crystal crystallizes in the triclinic system, molecular formula ZnC12H16N2O8, Mr=381.64, space group P with a = 6.338(1), b =6.919(1), c=9.277(1), α=96.28(1), β=104.91(1), γ=112.85(1)°, V=352.12(9)?3, Z=1, Dc=1.80g?cm-3 and F(000)=196, μ =1.791mm-1. The crystal structure was solved by direct methods for final R=0.0204 and Rw=0.0542 for 1258 observed reflections with [Fo>4σ(Fo)]. The crystal structure reveals that zinc ion is trans-octahedral with two pyridyl nitrogens and two aque oxygens at the equational positions and two aqua oxygens at the axial positions. The complex forms a three-dimensional network through intermolecular hydrogen bonds.展开更多
文摘Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Preliminary biological tests showed that complexes 1（CuL2Cl2（R=CH3）） and 5（ZnL2Cl2（R=n-C3H7）） exhibited a certain weeding activity against wheat and barnyard grass.
文摘Water-soluble chitosan complex with zinc was prepared from oligomeric chitosana fier oxidative degradation of chitosan. The process of complex formation were followed byUV and IR spectra measurements.
文摘According to the principles of simultaneous equilibrium and aqueous electronic charge neutrality, the complex equilibrium of zinc ammonia and zinc chloride in the system of Zn(Ⅱ) NH 3 NH 4Cl H 2O existing zinc oxide has been studied. The solubility rule and high solubility area of zinc oxide were discovered in the system whose zinc solubility is higher than other two ammonium systems, ammonium sulfate and ammonium carbonate. The absolute average error between the experimental values and the theoretically calculated values of zinc equilibrium concentration is 10.77% in aqueous solution of ammonia and ammonium chloride except in pure ammonium chloride solution. It shows that the critical stability constants and the thermodynamic data are believable. [
文摘The solubility properties of ZnSO4-Met/Phe/His-H2O systems at 25℃ in thewhole concentration range have been investigated by phase equilibrium method, and the corresponding equilibrium diagrams have been constructed. Under the direction of the phase equilibrium result, the compounds of ZnSO4 with Met, Phe and His which are not reported in literatures have been prepared and characterized.
基金The project was supported by the Education Office of Jilin Province (No. 0047)
文摘A metal-organic coordination polymer [ZnE.s（phen）（BDC）2（OH）]2 （phen = 1,10- phenanthroline, BDC = benzene-1,4-dicarboxylic acid） 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The complex crystallizes in the triclinic system, space group PI with a = 11.199（2）, b = 11.593（2）, c = 11.865（3）/A, α= 99.330（1）, β = 111.506（1）, γ = 104.804（1）^o, V= 1328.4（5）A^3, Dc= 1.722 g/cm^3, Z = 1, Mr = 1377.82, F（000） = 692,μ（MoKa） = 2.306 mm^-1, S = 1.093, R= 0.0281 and wR = 0.0756 for 4179 observed reflections （I 〉 2σ（/））. The coordination polyhedron around Zn（II） can be described as a tetrahedron, trigonal bipyramid and octahedron. It is worth noting that the crystal structure of 1 is composed of tetranuclear zinc clusters linked by {ZnO6} units.
文摘A zinc complex, [Zn(iso)_2(H_2O)_4](iso=C_6H_4NO_2^-), was synthesized and characterized by elemental analysis, thermal analysis and IR spectrum studies. The crystal structure of the complex was determined by X-ray diffraction. The crystal crystallizes in the triclinic system, molecular formula ZnC12H16N2O8, Mr=381.64, space group P with a = 6.338(1), b =6.919(1), c=9.277(1), α=96.28(1), β=104.91(1), γ=112.85(1)°, V=352.12(9)?3, Z=1, Dc=1.80g?cm-3 and F(000)=196, μ =1.791mm-1. The crystal structure was solved by direct methods for final R=0.0204 and Rw=0.0542 for 1258 observed reflections with [Fo>4σ(Fo)]. The crystal structure reveals that zinc ion is trans-octahedral with two pyridyl nitrogens and two aque oxygens at the equational positions and two aqua oxygens at the axial positions. The complex forms a three-dimensional network through intermolecular hydrogen bonds.
