Calorimetric study of the molecular complex formation of glycyl-glycyl-glycine with 18-crown-6 in aqueous organic solvents

被引：6
|
作者：
Usacheva, T. R. [1 ]
Thi, L. Pham [1 ,3 ]
Sharnin, V. A. [1 ,2 ]
机构：
[1] Ivanovo State Univ Chem & Technol ISUCT, Pr Sheremetevskii 7, Ivanovo 153000, Russia
[2] Russian Acad Sci, Krestov Inst Solut Chem, Ul Akad Skaya 1, Ivanovo 153040, Russia
[3] Vietnam Acad Sci & Technol, Inst Trop Technol, Hoang Quoc Viet Str 18, Hanoi, Vietnam
来源：
RUSSIAN JOURNAL OF GENERAL CHEMISTRY | 2017年 / 87卷 / 03期
关键词：
AMINO-ACIDS; WATER; THERMODYNAMICS; SOLVATION; ETHER; DIMETHYLSULFOXIDE; TRIGLYCINE; ETHANOL; ENTHALPY;
D O I：
10.1134/S1070363217030355
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The influence of water-ethanol (H2O-EtOH), water-acetone (H2O-MeAc) and waterdimethylsulfoxide (H2O-DMSO) solvents on the reaction of the molecular complex formation between ether 18-crown-6 (18C6) and small peptide glycyl-glycyl-glycine (3Gly) has been studied at T = 298.15 K. The thermodynamic parameters for the reaction (log K, Delta(r) G, Delta(r) H, Delta(r) S) were obtained from calorimetric titration experiments carried out by means of the calorimetric system TAM III (TA Instruments, USA). The thermodynamics of the [3Gly18C6] molecular complex formation is discussed in comparison with thermodynamic parameters of complex formation between 18C6 and amino acids in mixed solvents using the sD 3/4 lvation-thermodynamic approach.
引用
收藏
页码：591 / 599
页数：9
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