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作 者:李传华[1,2] 宋相志[1] 蒋建宏[2] 杨平[2] 姚飞虹[2] 李旭[2] 肖圣雄[2] 谢金麒 彭梦娜 潘兰[2] 伍锡斌 彭修 唐纯广 张平华[2] 蒋超[2] 刘文奇[2] 李强国[2]
机构地区:[1]中南大学化学化工学院,长沙410083 [2]湘南学院化学与生命科学系,郴州423043
出 处:《中国科学:化学》2014年第6期981-988,共8页SCIENTIA SINICA Chimica
基 金:中南大学博士后资金;国家自然科学基金(21273190,20973145);湖南省重点实验室开放课题重点项目(2012XGJSYB02);湖南省科技厅省级科技计划项目(2014FJ3011、2013FJ3033、2012TP4021-5);湘南学院科研课题立项资助项目(2013YJ36,2013YJ37,2013YJ38);应用化学湖南省重点学科和2012年度湘南学院大学生研究性学习和创新性实验计划项目(地沟油专用检测笔的制备);湖南省普通高校“十二五”专业综合改革试点项目(湘教通[2012]266号);湖南省普通高校实践教学建设项目(湘教通[2013]295号)资助
摘 要:以甲醇为溶剂,邻香草醛缩乙二胺席夫碱(H2vanen)与一水合醋酸铜[Cu(OAc)2·H2O]反应,合成了一种Valen席夫碱单核铜配合物[Cu(vanen)(H2O)].以盖斯定律为理论基础,设计了一个合理可行的热化学循环.根据该热化学循环,依次测定了各样品的标准摩尔溶解焓,进而求得配位反应的标准摩尔反应焓(θr m?H)为?(16.61±0.54)kJ/mol.再结合其他相关的文献值,求得配合物的标准摩尔生成焓(θf m?H)为?(756.5±2.4)kJ/mol.在32℃条件下,用热导式等温微量热仪测定了不同浓度配合物作用下粟酒裂殖酵母细胞的产热曲线,探讨了不同浓度的配合物对酵母菌生长的影响,分析了配合物的浓度与酵母菌代谢的生长速率常数k、抑制率I、最大发热功率Pmax、半抑制浓度IC50以及达到最大发热功率所需时间tmax等动力学参数之间的关系.分析结果表明,配合物对粟酒裂殖酵母细胞的生长具有低浓度促进、高浓度抑制的Hormesis效应.A mononuclear salen-type complex [Cu(vanen)(H2O)] was synthesized from the ligand [H2vanen = N,N'- ethylene-bis(3-methoxysalicylideneimine)] and Cu(OAc)2·H2O. Based on Hess' law, a reasonable thermochemical cycle was designed. According to the cycle, the standard molar enthalpies of dissolution of samples in the calorimetric solvent of DMF (N,N-dimethylformamide) were determined, respectively. The standard molar enthalpy change of the coordination reaction (ΔrHmθ) was calculated to be -(16.61 ± 0.54) kJ/mol. Combined with some relevant literature data, the standard molar enthalpy of formation (ΔfHmθ) of the complex was obtained to be -(756.5 ± 2.4) kJ/mol. At the temperature of 32 ℃, the metabolic thermogenetic curves of S. pombe under the influence of the complex with different concentration were determined by using a TAM air isothermal calorimeter. The relationships of the concentration of the complex with the microbial growth rate constant (k) of S. pombe, inhibition ratio (I), the half inhibition concentration (IC50), the maximum heat output power (Pmax) and the time it took (tmax) were analyzed. The results indicated that the complex possessed the Hormesis effect, which promoted the growth of S. pombe at lower concentration, but inhibited the growth at higher concentration.
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