ENTHALPY AND ENTROPY CHANGES ON MOLECULAR INCLUSION OF 1,3-BUTANEDIOL INTO ALPHA-CYCLODEXTRIN AND BETA-CYCLODEXTRIN CAVITIES IN AQUEOUS-SOLUTIONS

被引：18

作者：

TAKAGI, S

FUJISAWA, M

KIMURA, T

机构：

[1] Department of Chemistry, Faculty of Science and Technology, Kinki University, Higashi-Osaka, 577

来源：

THERMOCHIMICA ACTA | 1991年 / 183卷

关键词：

D O I：

10.1016/0040-6031(91)80465-U

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The enthalpies of transfer of 1,3-butanediol (BD) from aqueous solutions to aqueous alpha- or beta-cyclodextrin (CD) solutions have been determined by microcalorimetry at various mole fractions at 298.15 K. The enthalpy changes on inclusion of 1,3-BD in aqueous solutions determined for alpha-CD and beta-CD are exothermic and small. However, those from the ideal gas phase are large. Comparison with other alcohols shows that 1,3-BD molecules in the CD cavities must be changing their conformation according to the size of the cavities. The enthalpies of dilution of dilute aqueous CD solutions having a mole fraction smaller than 0.0015 are also determined.

引用

页码：289 / 297

页数：9

共 18 条

[1] HEAT CAPACITIES OF ORGANIC COMPOUNDS IN SOLUTION .I. LOW MOLECULAR WEIGHT ALCOHOLS IN WATER [J].