DIFFERENTIAL SCANNING CALORIMETRY STUDIES ON UREA - CARBOXYLIC-ACID INCLUSION COMPLEXES

被引：7

作者：

AHMAD, J

FREESTONE, AJ

HUSSAIN, A

机构：

[1] Department of Chemistry, University of Bahrain

来源：

JOURNAL OF INCLUSION PHENOMENA AND MOLECULAR RECOGNITION IN CHEMISTRY | 1994年 / 18卷 / 02期

关键词：

INCLUSION COMPOUNDS; UREA FATTY ACID COMPLEXES; DIFFERENTIAL SCANNING CALORIMETRY;

D O I：

10.1007/BF00705815

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Inclusion complexes of urea with several long chain fatty acids (of up to 30 C atoms) were prepared and their thermal behavior was investigated by differential scanning calorimetry (DSC). The host-guest ratios in these complexes were determined by titration against standard NaOH solution using pH to determine the end point. The DSC thermograms showed that complexes of the higher saturated acids (with 23 or more C atoms) rue stable even above the melting point of urea. This is contrary to the currently accepted view that for complexes of urea and fatty acids, the outer urea lattice simply melts when the melting point of urea is reached, causing the complex to decompose.

引用

页码：115 / 121

页数：7

共 21 条

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