SIGNIFICANT DISCREPANCIES BETWEEN VANT HOFF AND CALORIMETRIC ENTHALPIES .2.

被引：115

作者：

LIU, YF

STURTEVANT, JM

机构：

[1] YALE UNIV,DEPT CHEM,NEW HAVEN,CT 06520

[2] YALE UNIV,DEPT MOLEC BIOPHYS & BIOCHEM,NEW HAVEN,CT 06520

来源：

PROTEIN SCIENCE | 1995年 / 4卷 / 12期

关键词：

CALORIMETRIC ENTHALPIES; CALORIMETRY; TEMPERATURE VARIATION OF EQUILIBRIUM CONSTANTS; VANT HOFF ENTHALPIES;

D O I：

10.1002/pro.5560041212

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Isothermal calorimetric titration of 18-crown-6 ether with BaCl2 in pure aqueous solution over the temperature range 7-40 degrees C gives precise binding constants and enthalpy changes. Nonlinear least-squares fitting of the binding constants to the integrated van't Hoff equation, including a temperature-independent change in heat capacity, leads to van't Hoff enthalpies that differ significantly from the observed calorimetric enthalpies. This perplexing discrepancy appears at present to be very widely occurring.

引用

页码：2559 / 2561

页数：3

共 5 条

[1] STANDARD POTENTIALS OF BARIUM AMALGAM ELECTRODE AND THERMODYNAMIC FUNCTIONS FOR DILUTE BARIUM AMALGAMS AND FOR AQUEOUS BARIUM CHLORIDE [J].