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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (11): 1951-1956. 上一篇    下一篇

研究论文

甘氨酸在葡萄糖-水和蔗糖-水混合溶剂中的体积性质

李淑芹;桑文强;林瑞森   

  1. 中国科学院植物研究所光合作用研究中心.北京(100093);浙江大学化学系杭 州(310027)
  • 发布日期:2002-11-15

Volumetric Properties of Glycine in Glucose-Water and Sucrose-Water Mixed Sovents at 298.15K

Li Shuqin;Sang Wenqiang;Lin Ruisen   

  1. Photosynthesis Center, Institute of Botany, Chinese Academy of Sciences.Beijing(100093);Department of Chemistry, Zhejiang University, Hangzhou(310027)
  • Published:2002-11-15

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被引次数

53 | 2

利用精密数字密度计测定了甘氨酸与不同组成葡萄糖-水、蔗糖、水混合溶剂 构成的三元系溶液的密度，计算了甘氨酸的表观摩尔体积、极限偏摩尔体积和理论 水化数，根据结构水合作用模型讨论了迁移偏摩尔体积的变化规律，并与乙二醇- 水和丙三醇-水等多羟基体系作了比较。结果表明，甘氨酸分子在多羟基化合物-水 体系中增体积效应的大小与多羟基化合物所含OH基数的多少有关。

关键词: 甘氨酸, 葡萄糖, 蔗糖, 水, 溶剂, 相互作用, 体积变化

Densities of glycine in glucose-water and sucrose-water mixed solvents have been measured to 298.15 K by an oscillating-tube densimeter. Apparent molar volumes, limiting partial molar volumes and number of hydration of glycine have been calculated. The transfer volumes from water to sugar-water mixtures have been obtained and discussed in terms of the structural hydration interaction model. The results obtained have been compared with that in glycerol-water and ethylene glycol-water mixtures. It is concluded that the magnitude of enhancement effect on volume is related to the number of OH groups.

Key words: GLYCINE, GLUCOSE, SUCROSE, WATER, SOLVENTS, INTERACTIONS, VOLUME CHANGE

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