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化学学报
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化学学报 ›› 1999, Vol. 57 ›› Issue (8): 875-880. 上一篇    下一篇

研究论文

甘氨酸在DMF/水和乙醇/水混合溶剂中的焓对相互作用

任小玲;林瑞森;胡新根;倪亚明   

  1. 同济大学化学系.上海(200092);浙江大学化学系.杭州(310027)
  • 发布日期:1999-08-15

Pairwise interactions of enthalphy of glycine in DMF/water and ethanol/ water mixtures at 298.15k

Ren Xiaoling;Lin Ruisen;Hu Xingen;Ni Yaming   

  1. TongJi Univ., Dept of Chem.Shanghai(200092);Zhejiang Univ, Dept Chem. Hangzhou(310027)
  • Published:1999-08-15

PDF

843

被引次数

63

利用LKB2277生物活性检测仪对298.15K时甘;氨酸在纯水,DBF/水和乙醇/水混合溶剂DBF(或乙醇的质量分数为0.05~0.45,以10%递增)中的稀释焓进行了测定,并利用维里展开式法关联得到焓对相互作用系数值.结果表明,焓对相互作用系数h~2与溶剂的结构性质密切相关.在DBF/水混合物溶剂中,h~2随DBF含量的增加而变得更负;而在乙醇/水混合溶剂中,h~2与乙醇含量近似呈抛物线型关系,在乙醇质量分数为0.25时h~2达到一个极小值。

关键词: 甘氨酸, 二甲基甲酰胺, 水, 乙醇, 生物活性, 溶解, 焓, 相互作用

The inthalpies of dilution of glycine in water,DBF/water and ethanol/water mixtures(in10% increments ranging from 5%to 45% DBF or ethanol by weight) have been measured with LKB 2277 Bio Activity Monitor at 298.15K.Calculations show that pairwise enthalpic interaction coefficients h~2 is closely connected with solvent properties. The values of h~2 decrease with increasing DMF concentrationand reach a minimum at 25% ethanol in ethanol/water mixtures.

Key words: GLYCINE, DIMETHYLFORMAMIDE, WATER, ETHANOL, BIOLOGICAL ACTIVITY, DISSOLUTION, ENTHALPY, INTERACTIONS

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