The adductive reaction of Ni[S2P(OCH2CH2Ph)2]2 with pyridine was studied by spectrographic method and the equilibrium constants was found to be β1=(1.12±0.09)×102,β2=(2.40±0.41)×104,R1=0.997,R2=0...The adductive reaction of Ni[S2P(OCH2CH2Ph)2]2 with pyridine was studied by spectrographic method and the equilibrium constants was found to be β1=(1.12±0.09)×102,β2=(2.40±0.41)×104,R1=0.997,R2=0.998.The adduct Ni[S2P(OCH2CH2Ph)2]2·2Py was characterized by elemental analysis,IR spectra,single-crystal X-ray diffraction method.The crystal structure belongs to monoclinic system,space group P 21/c with the following crystallographic parameters:a=9.240(3),b=16.124(8),c=14.148(7),α=90.00°,β=92.07(4)°,γ=90.00°.展开更多
We reported the synthesis of [Ni（hmta）][SSP(OC10H7-2)2]2(where hmta is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane,and 2-C10H7O-is 2-nathphthyloxy).The complex is characterized by elemental analysis,...We reported the synthesis of [Ni（hmta）][SSP(OC10H7-2)2]2(where hmta is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane,and 2-C10H7O-is 2-nathphthyloxy).The complex is characterized by elemental analysis,IR spectra,1HNMR spectra,electronic spectra and TG-DTA thermal analysis,and its crystal structure has been determined.The compound belongs to triclinic system,space group P ī with the following crystallographic parameters:a=7.691（2）,b=10.505（5）,c=17.692（5）,α=105.52（3）°,β=90.09（3）°,γ=103.92（4）°,V=1333.5（8）3,DC=1.377g/cm3,F（000）=582,μ（Mo Kα）=0.631mm-1,Z=1,and final R=0.0752,wR=0.1957 for 2425 observed reflections（I>2σ（I））.The analytical results of crystal structure and spectroscopic properties show that a square planar complex cation [Ni（hmta）]2+ is formed by coordination of four nitrogen atoms of ligand hmta to Ni（Ⅱ）.There isn’t interaction of Ni（Ⅱ） with sulfur atom of (2—C10H7O)2PSS-anion,but there are three N-H…S hydrogen bonds between [Ni（hmta）]2+ complex cation and(2—C10H7O)2PSS-anion in the compound.展开更多
Three aza crowned Schiff base cobalt(II) complexes were synthesized and characterized,and the metallomicelle made up of the cobalt(II) complexes and surfactants,as mimic hydrolytic metalloenzyme,was used in catalytic ...Three aza crowned Schiff base cobalt(II) complexes were synthesized and characterized,and the metallomicelle made up of the cobalt(II) complexes and surfactants,as mimic hydrolytic metalloenzyme,was used in catalytic hydrolysis of bis(4-nitrophenyl) phosphate(BNPP).The mechanism of BNPP catalytic hydrolysis has been proposed based on the analytic result of specific absorption spectrum of the hydrolytic reaction systems.A kinetic mathematical model,for the calculation of the kinetic parameter of BNPP catalytic hydrolysis has been established based on the mechanism proposed.The effect of surfactant and temperature on the reaction rate of BNPP catalytic hydrolysis has been discussed.展开更多
Three novel cobalt(Ⅱ) complexes of the benzoaza-15-crown-5 Schiff base were synthesized and characterized.For comparison,the catalytic activity of the complexes were also investigated.The mechanism of the phenol cata...Three novel cobalt(Ⅱ) complexes of the benzoaza-15-crown-5 Schiff base were synthesized and characterized.For comparison,the catalytic activity of the complexes were also investigated.The mechanism of the phenol catalytic oxidation were studied.The acid effect of reaction system,structural effect of the complexes,and effect of temperature on the rate of the phenol catalytic oxidation by the mimetic peroxidase were discussed.The results show:the schiff base cobalt(Ⅱ) complexes as peroxidase mimics exhibit good catalytic activity and similar catalytic character to natural enzyme.展开更多
文摘The adductive reaction of Ni[S2P(OCH2CH2Ph)2]2 with pyridine was studied by spectrographic method and the equilibrium constants was found to be β1=(1.12±0.09)×102,β2=(2.40±0.41)×104,R1=0.997,R2=0.998.The adduct Ni[S2P(OCH2CH2Ph)2]2·2Py was characterized by elemental analysis,IR spectra,single-crystal X-ray diffraction method.The crystal structure belongs to monoclinic system,space group P 21/c with the following crystallographic parameters:a=9.240(3),b=16.124(8),c=14.148(7),α=90.00°,β=92.07(4)°,γ=90.00°.
文摘We reported the synthesis of [Ni（hmta）][SSP(OC10H7-2)2]2(where hmta is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane,and 2-C10H7O-is 2-nathphthyloxy).The complex is characterized by elemental analysis,IR spectra,1HNMR spectra,electronic spectra and TG-DTA thermal analysis,and its crystal structure has been determined.The compound belongs to triclinic system,space group P ī with the following crystallographic parameters:a=7.691（2）,b=10.505（5）,c=17.692（5）,α=105.52（3）°,β=90.09（3）°,γ=103.92（4）°,V=1333.5（8）3,DC=1.377g/cm3,F（000）=582,μ（Mo Kα）=0.631mm-1,Z=1,and final R=0.0752,wR=0.1957 for 2425 observed reflections（I>2σ（I））.The analytical results of crystal structure and spectroscopic properties show that a square planar complex cation [Ni（hmta）]2+ is formed by coordination of four nitrogen atoms of ligand hmta to Ni（Ⅱ）.There isn’t interaction of Ni（Ⅱ） with sulfur atom of (2—C10H7O)2PSS-anion,but there are three N-H…S hydrogen bonds between [Ni（hmta）]2+ complex cation and(2—C10H7O)2PSS-anion in the compound.
文摘Three aza crowned Schiff base cobalt(II) complexes were synthesized and characterized,and the metallomicelle made up of the cobalt(II) complexes and surfactants,as mimic hydrolytic metalloenzyme,was used in catalytic hydrolysis of bis(4-nitrophenyl) phosphate(BNPP).The mechanism of BNPP catalytic hydrolysis has been proposed based on the analytic result of specific absorption spectrum of the hydrolytic reaction systems.A kinetic mathematical model,for the calculation of the kinetic parameter of BNPP catalytic hydrolysis has been established based on the mechanism proposed.The effect of surfactant and temperature on the reaction rate of BNPP catalytic hydrolysis has been discussed.
文摘Three novel cobalt(Ⅱ) complexes of the benzoaza-15-crown-5 Schiff base were synthesized and characterized.For comparison,the catalytic activity of the complexes were also investigated.The mechanism of the phenol catalytic oxidation were studied.The acid effect of reaction system,structural effect of the complexes,and effect of temperature on the rate of the phenol catalytic oxidation by the mimetic peroxidase were discussed.The results show:the schiff base cobalt(Ⅱ) complexes as peroxidase mimics exhibit good catalytic activity and similar catalytic character to natural enzyme.
