高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (11): 2128.

• 研究快报 • 上一篇    下一篇

甘氨酸从水到有机物水溶液的迁移焓研究

马林1, 林瑞森2, 林贵梅2, 徐南2   

  1. 1. 广西大学化学化工学院,南宁530004;
    2. 浙江大学化学系,杭州310027
  • 收稿日期:2004-10-10 出版日期:2005-11-10 发布日期:2005-11-10
  • 基金资助:

    国家自然科学基金(批准号:20273061)资助

Transfer Enthalpies of Glycine from Water to Aqueous Organic Solutions

MA Lin1, LIN Rui-Sen2, LIN Gui-Mei2, XUNan2   

  1. 1. College of Chemistry and Chemical Engineering,Guangxi University,Nanning530004,China;
    2. Department of Chemistry,Zhejiang University,Hangzhou310027,China
  • Received:2004-10-10 Online:2005-11-10 Published:2005-11-10

关键词: 甘氨酸, 迁移焓, 尿素, 甲酰胺, 乙酰胺, 二甲亚砜, 丙酮

Abstract: The enthalpies of solution of glycine in aqueous solutions of urea,formamide,acetamide,DMSOand acetone were measured at298.15 K by a RD496-Ⅲ microcalorimeter.The transfer enthalpies(ΔtrH) ofglycine from water to aqueous organic mixtures were derived and interpreted qualitatively with structural hydra-tion interaction model.The results suggest that hydrophilic-hydrophilic interaction between glycine and cosol-vent molecule gives a negative contribution to the transfer enthalpies of glycine,while the hydrophilic hydro-phobic interaction makes a positive contribution.The relative position ofΔtrH-composition profiles viz.urea <formamide <0 <acetamide <DMSO<acetone,characterizes the hydrophobicity or hydrophilicity of the cosol-vent molecule and correctly reflectes the solute-solvent interaction in the transfer process.

Key words: Glycine, Transfer enthalpies, Urea, Formamide, Acetamide, DMSO, Acetone

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