The thermokinetic properties of the action of two kinds of lanthanum complexes [La(Hsal)2·(tch)]·2H2O and La(Hsal)2·(hq)(Hsal= C7H5O3,tch= C4H6NO2S,hq =C9H6NO)on growth metabolism of Escherichia coli we...The thermokinetic properties of the action of two kinds of lanthanum complexes [La(Hsal)2·(tch)]·2H2O and La(Hsal)2·(hq)(Hsal= C7H5O3,tch= C4H6NO2S,hq =C9H6NO)on growth metabolism of Escherichia coli were studied by a TAM air isothermal calorimeter at 37.00℃.The maximum heat output power Pmax,growth rate constant k,generation timestG,inhibitive ratio I(%) and half inhibition concentration cI,50,were obtained respectively.The results showed that complex[La(Hsal)2·(tch)]·2H2O possessed the bi-directional biological effect.It inhibited the growth of the E.coli at lower concentration but stimulated the growth at higher concentration.The complexes La(Hsal)2·(hq) possessed inhibitory effect.Inhibitory effect of La(Hsal)2·(hq)(cI,50=1.81 mg·L-1) was stronger than that of [La(Hsal)2·(tch)]·2H2O(CI,50=9.78mg·L-1).展开更多
Solid state reaction between La (Ac)3·3/2H2O and 8-hydroxyquinoline (Oxine)was studied at a low heating temperature. La (Oxine)3 was synthesized by one step solid state reaction at 60℃, and the product is charac...Solid state reaction between La (Ac)3·3/2H2O and 8-hydroxyquinoline (Oxine)was studied at a low heating temperature. La (Oxine)3 was synthesized by one step solid state reaction at 60℃, and the product is characterized by elementary analysis, IR, XRD,photoacoustic spectra and flourenscence spectra. The influence of the temperature on solid state reaction was discussed.展开更多
The stability constants of the 1:1 complexes of H4L2 (5,12-dipheny1-7, 14-dimethyl1,4,8,11-tetraazamasrocyclotetradecane-N’, N". N"’,N""-tetraacetic acid) with Ln3+ (Ln=La,Nd, Pr, Sm, Eu, Gd, Dy,...The stability constants of the 1:1 complexes of H4L2 (5,12-dipheny1-7, 14-dimethyl1,4,8,11-tetraazamasrocyclotetradecane-N’, N". N"’,N""-tetraacetic acid) with Ln3+ (Ln=La,Nd, Pr, Sm, Eu, Gd, Dy, Yb) were determined by potemtiometric titrations in 0.5mol·L-1 KCl at 40±0.1℃, 50±0.1℃ and 60±0.1℃ respectively. The H. S and G of the coordination reactions of H4L2 with Ln3+ were given. Influences of the steric effect and temperature changes on the stability lanthanide complexes were discussed thermodynamically.展开更多
文摘The thermokinetic properties of the action of two kinds of lanthanum complexes [La(Hsal)2·(tch)]·2H2O and La(Hsal)2·(hq)(Hsal= C7H5O3,tch= C4H6NO2S,hq =C9H6NO)on growth metabolism of Escherichia coli were studied by a TAM air isothermal calorimeter at 37.00℃.The maximum heat output power Pmax,growth rate constant k,generation timestG,inhibitive ratio I(%) and half inhibition concentration cI,50,were obtained respectively.The results showed that complex[La(Hsal)2·(tch)]·2H2O possessed the bi-directional biological effect.It inhibited the growth of the E.coli at lower concentration but stimulated the growth at higher concentration.The complexes La(Hsal)2·(hq) possessed inhibitory effect.Inhibitory effect of La(Hsal)2·(hq)(cI,50=1.81 mg·L-1) was stronger than that of [La(Hsal)2·(tch)]·2H2O(CI,50=9.78mg·L-1).
文摘Solid state reaction between La (Ac)3·3/2H2O and 8-hydroxyquinoline (Oxine)was studied at a low heating temperature. La (Oxine)3 was synthesized by one step solid state reaction at 60℃, and the product is characterized by elementary analysis, IR, XRD,photoacoustic spectra and flourenscence spectra. The influence of the temperature on solid state reaction was discussed.
文摘The stability constants of the 1:1 complexes of H4L2 (5,12-dipheny1-7, 14-dimethyl1,4,8,11-tetraazamasrocyclotetradecane-N’, N". N"’,N""-tetraacetic acid) with Ln3+ (Ln=La,Nd, Pr, Sm, Eu, Gd, Dy, Yb) were determined by potemtiometric titrations in 0.5mol·L-1 KCl at 40±0.1℃, 50±0.1℃ and 60±0.1℃ respectively. The H. S and G of the coordination reactions of H4L2 with Ln3+ were given. Influences of the steric effect and temperature changes on the stability lanthanide complexes were discussed thermodynamically.
