物理化学学报 >> 2002, Vol. 18 >> Issue (12): 1110-1115.doi: 10.3866/PKU.WHXB20021211

研究简报 上一篇    下一篇

丝氨酸在葡萄糖-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
  • 收稿日期:2002-03-18 修回日期:2002-04-22 发布日期:2002-12-15
  • 通讯作者: 李淑芹 E-mail:lishuqin1965@yahoo.com.cn

Volumetric Properties of Serine in Glucose-water and Sucrose-water Mixed Solvents at 298.15 K

Li Shu-Qin;Sang Wen-Qiang;Lin Rui-Sen   

  1. Photosynthesis Center, Institute of Botany, Chinese Academy of Sciences, Beijing 100093; Department of Chemistry, Zhejiang University, Hangzhou 310027
  • Received:2002-03-18 Revised:2002-04-22 Published:2002-12-15
  • Contact: Li Shu-Qin E-mail:lishuqin1965@yahoo.com.cn

摘要: 利用精密数字密度计测定了丝氨酸与不同组成的葡萄糖-水、蔗糖-水混合溶剂构成的三元系溶液的密度,计算了丝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,丝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基数目的多少有关.

关键词: 丝氨酸, 葡萄糖-水混合溶剂, 蔗糖-水混合溶剂, 极限偏摩尔体积, 结构相互作用

Abstract: Densities of serine in glucose-water and sucrose-water mixed solvents have been measured at 298.15 K by an oscillating-tube densimeter. Apparent molar volumes, limiting partial molar volumes and number of hydration of serine 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: Serine, Glucose-water mixed solvents, Sucrose-water mixed solvents,  Limiting partial molar volumes, Structural interaction