Molecular complex formation between l-phenylalanine and 18-crown-6 in H2O–DMSO solvents studied by titration calorimetry at T = 298.15 K

被引：0
作者：
T. R. Usacheva
I. V. Chernov
V. A. Sharnin
S. I. Voronina
E. Matteoli
机构：
[1] Research Institute of Thermodynamics and Kinetics of Chemical Processes,Ivanovo State University of Chemistry and Technology
[2] CNR-IPCF,undefined
[3] Institute of Physical–Chemical Processes of National Research Council (Italy),undefined
[4] UOS of Pisa,undefined
来源：
Journal of Thermal Analysis and Calorimetry | 2013年 / 112卷
关键词：
Binary solvents; Complex formation; Crown ether 18-crown-6; Dimethylsulfoxide; Enthalpy; Gibbs energy; -phenylalanine; Solvation; Stability constant;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The standard thermodynamic parameters (ΔrG°, ΔrH°, TΔrS°) of the reaction of molecular complex formation between 18-crown-6 ether (18C6) and l-phenylalanine (Phe), [Phe18C6], have been obtained from calorimetric titration experiments carried out by means of the microcalorimetric system TAM III (TA Instruments, USA) at T = 298.15 K in water–dimethylsulfoxide (H2O–DMSO) solvents. Results show that the increase of the DMSO concentration in the mixed solvents brings about an increase of the [Phe18C6] complex stability and of the exothermicity of the reaction of complex formation.
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页码：399 / 405
页数：6
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