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用六水合氯化镨、硫代脯氨酸(C4H7NO2S)和水杨酸(C7H6O3)合成了三元固体配合物[Pr(C7H5O3)2(C4H6NO2S)]-2H2O.根据盖斯定律设计一个热化学循环,用溶解-反应量热法研究得到合成反应的标准摩尔焓变为(133.70±1.02)kJ/mol,配合物298.15K时的标准摩尔生成焓为-(2909.3±3.2)kJ/mol.用TAMair微量热仪测定其在28.00℃时对粟酒裂殖酵母作用的产热曲线,进而算出在配合物作用下,酵母菌生长代谢的最大发热功率Pmax、速率常数κ、传代时间tG、抑制率I和半抑制浓度cI,50等热动力学参数.结果表明:稀土水杨酸硫代脯氨酸配合物在低浓度下对酵母菌有刺激作用,高浓度下为抑制作用,即稀土配合物对微生物的生长具有双向生物效应,也称为Hormesis效应.
Ternary solid complexes [Pr (C7H5O3) 2 (C4H6NO2S)] - 2H2O were synthesized from praseodymium chloride hexahydrate, thioproline (C4H7NO2S) and salicylic acid (C7H6O3) .According to Gass’s law, (133.70 ± 1.02) kJ / mol, and the standard molar enthalpy of formation for the complex at 298.15 K was - (2909.3 ± 3.2) kJ / mol. The molar enthalpy of formation TAMair microcalorimetry was used to determine the thermogenesis curve of S. pombe at 28.00 ℃. The maximal heating power Pmax, rate constant κ, passage time tG and inhibition rate of yeast growth and metabolism under the action of complex were calculated. I and half-inhibitory concentration of cI, 50 and other thermodynamic parameters.The results showed that: rare earth salicylic acid thioproline complex at low concentrations of yeast stimulation, inhibitory effect at high concentrations, namely rare earth complexes Has a bi-directional biological effect on the growth of microorganisms, also known as the Hormesis effect.