A new method has been developed for separation and determination of zinc,copper,cobalt and nickel based on their colour chelates with 6,6″-dimethyl-4′-phenyl-2,2′:6′,2″-terpyridine（TPY） by ion pair high perform...A new method has been developed for separation and determination of zinc,copper,cobalt and nickel based on their colour chelates with 6,6″-dimethyl-4′-phenyl-2,2′:6′,2″-terpyridine（TPY） by ion pair high performance liquid chromatography in a reversed phase mode.The suitable conditions are the methanol-water（80:20,V/V） containing 10mmol/L NaH2PO4-H3PO4 buffer solution（pH=5.0） and 3.0mmol/L sodium dodecyl sulfonate as mobile phase,on a Symmetry C18 column（3.9mmID×150mm）,the flow rate of the mobile phase is 1.0mL/min.Spectrophotometric detection was made at 340nm.The detective limits are 0.05,0.10,2.00 and 0.50ng/mL respectively.The method has good selectivity and sensitivity.It has been applied to the separation and determination of zinc,copper,cobalt and nickel in human hair and tobacco and the result is satisfied.展开更多
Kinetics of the coordination reaction of tetrakis(Ncarbomethoxymethyl3pyridyl) porphyrin(abbr. H2TβNACMSPyP) with Cu?ion has been studied in ophthalic acid buffer system in an ionic strength of 0.5mol...Kinetics of the coordination reaction of tetrakis(Ncarbomethoxymethyl3pyridyl) porphyrin(abbr. H2TβNACMSPyP) with Cu?ion has been studied in ophthalic acid buffer system in an ionic strength of 0.5mol·dm-3(KCI) at 35.0±0.1℃.The reaction is catalyzed by ophthalic ion. The effect of concentration of the catalyst, metal ion and pH value of solution was discussed. The kinetics equation of the reaction were obtained as d/dt=16.15{(1.0+3.35×1052)/1.0+1.57×10-42}T. The mechanism of the reaction was proposed. The deformation of the ring of porphyrins is the general condition in the reaction. Keyowrds:展开更多
The crystal structure of [Cu(sal ala)bipy]·CH 3OH·2H 2O (sal ala: salicylaldehyde alaninato, bipy: 2,2′ bipyridine), a potential anticancer agent and tumor imaging agent, is determined at 123 K. The complex...The crystal structure of [Cu(sal ala)bipy]·CH 3OH·2H 2O (sal ala: salicylaldehyde alaninato, bipy: 2,2′ bipyridine), a potential anticancer agent and tumor imaging agent, is determined at 123 K. The complex crystallizes in triclinic, space group P - 1. The cell dimensions are a =0 894 8(2) nm, b =0 973 1(2) nm, c =1 263 2(3) nm; α =78 06(3)°, β =78 02(3)°, γ =88 22(3)°; V =1 052 6(4) nm 3, M r=479 99, Z =2, ρ c=1 514 g·cm -3 . The total number of 4 313 independent reflections with I>2σ(I) are used for the structure determination. The final R is 0 075 8 and R w is 0 179.The central Cu 2+ ion is penta coordinated by tridentate Schiff base and bidentate bipy, resulting in a distorted square pyramid coordination polyhedron. Three kinds of hydrogen bonds are revealed.展开更多
文摘A new method has been developed for separation and determination of zinc,copper,cobalt and nickel based on their colour chelates with 6,6″-dimethyl-4′-phenyl-2,2′:6′,2″-terpyridine（TPY） by ion pair high performance liquid chromatography in a reversed phase mode.The suitable conditions are the methanol-water（80:20,V/V） containing 10mmol/L NaH2PO4-H3PO4 buffer solution（pH=5.0） and 3.0mmol/L sodium dodecyl sulfonate as mobile phase,on a Symmetry C18 column（3.9mmID×150mm）,the flow rate of the mobile phase is 1.0mL/min.Spectrophotometric detection was made at 340nm.The detective limits are 0.05,0.10,2.00 and 0.50ng/mL respectively.The method has good selectivity and sensitivity.It has been applied to the separation and determination of zinc,copper,cobalt and nickel in human hair and tobacco and the result is satisfied.
文摘Kinetics of the coordination reaction of tetrakis(Ncarbomethoxymethyl3pyridyl) porphyrin(abbr. H2TβNACMSPyP) with Cu?ion has been studied in ophthalic acid buffer system in an ionic strength of 0.5mol·dm-3(KCI) at 35.0±0.1℃.The reaction is catalyzed by ophthalic ion. The effect of concentration of the catalyst, metal ion and pH value of solution was discussed. The kinetics equation of the reaction were obtained as d/dt=16.15{(1.0+3.35×1052)/1.0+1.57×10-42}T. The mechanism of the reaction was proposed. The deformation of the ring of porphyrins is the general condition in the reaction. Keyowrds:
文摘The crystal structure of [Cu(sal ala)bipy]·CH 3OH·2H 2O (sal ala: salicylaldehyde alaninato, bipy: 2,2′ bipyridine), a potential anticancer agent and tumor imaging agent, is determined at 123 K. The complex crystallizes in triclinic, space group P - 1. The cell dimensions are a =0 894 8(2) nm, b =0 973 1(2) nm, c =1 263 2(3) nm; α =78 06(3)°, β =78 02(3)°, γ =88 22(3)°; V =1 052 6(4) nm 3, M r=479 99, Z =2, ρ c=1 514 g·cm -3 . The total number of 4 313 independent reflections with I>2σ(I) are used for the structure determination. The final R is 0 075 8 and R w is 0 179.The central Cu 2+ ion is penta coordinated by tridentate Schiff base and bidentate bipy, resulting in a distorted square pyramid coordination polyhedron. Three kinds of hydrogen bonds are revealed.
