Synthesis, thermochemical and thermokinetic studies on the mononuclear copper Valen Schiff base complex
| Autor: | XiBin Wu, Jin-Qi Xie, LI Qiangguo, Chun-Guang Tang, ChuanHua Li, Wen-Qi Liu, Ping Yang, Jian-Hong Jiang, Li Xu, Fei-Hong Yao, Xiangzhi Song, Lan Pan, Chao Jiang, Sheng-Xiong Xiao, Ping-Hua Zhang, Meng-Na Peng, Xiu Peng |
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| Rok vydání: | 2014 |
| Předmět: |
Hess's law
Isothermal microcalorimetry Schiff base General Chemical Engineering Enthalpy Thermodynamics General Chemistry Biochemistry Standard enthalpy of formation Isothermal process chemistry.chemical_compound Reaction rate constant chemistry Materials Chemistry Dimethylformamide Nuclear chemistry |
| Zdroj: | SCIENTIA SINICA Chimica. 44:981-988 |
| ISSN: | 1674-7224 |
| DOI: | 10.1360/n032014-00002 |
| Popis: | A mononuclear salen-type complex [Cu( vanen )(H 2 O)] was synthesized from the ligand [H 2 vanen = N , N - ethylene-bis(3-methoxysalicylideneimine)] and Cu(OAc) 2 ·H 2 O. 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 (Δ r H m θ ) was calculated to be -(16.61 ± 0.54) kJ/mol. Combined with some relevant literature data, the standard molar enthalpy of formation (Δ f H m θ ) 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 (IC 50 ), the maximum heat output power ( P max ) and the time it took ( t max ) 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. |
| Databáze: | OpenAIRE |
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