Influence of the Composition of (H2O + SDS) Mixtures on the Interaction Energy of dl-α-Alanyl-dl-α-Valine and dl-α-Alanyl-dl-α-Norleucine with SDS Micelles at T=298.15 K

被引:4
|
作者
Smirnov, V. I. [1 ]
Badelin, V. G. [1 ]
Barannikov, V. P. [1 ]
Kurbatova, M. S. [1 ]
机构
[1] Russian Acad Sci, GA Krestov Inst Solut Chem, Akad Skay Str 1, Ivanovo 153045, Russia
关键词
Peptides; Water; Sodium dodecyl sulfate; Solution and transfer enthalpies; SODIUM DODECYL-SULFATE; ALPHA-AMINO ACIDS; AQUEOUS-SOLUTIONS; THERMODYNAMIC CHARACTERISTICS; WATER; DISSOLUTION; ENTHALPIES; DILUTION; SURFACTANTS; MIXTURES;
D O I
10.1007/s10953-019-00910-1
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The dissolution enthalpies (Delta H-sol(m)) of DL-alpha-alanyl-DL-alpha-valine (AlaVal) and DL-alpha-alanyl-DL-alpha-norleucine (AlaNln) in aqueous solutions of dodecyl sulfate (SDS) at SDS concentration of m(SDS) = 0.05 mol.kg(-1) and peptide concentration m = 0.010 to 0.025 mol.kg(-1) at T = 298.15 K were measured via calorimetry. The results obtained have been used to calculate the transfer enthalpies (Delta H-tr(m)) of AlaVal and AlaNln from water into (water + SDS) micellar solution. Thermochemical characteristics of the transfer of AlaVal, and AlaNln in the investigated range of peptide concentrations are compared. The results are interpreted by considering ion-ion, ion-polar, and hydrophobic-hydrophobic interactions between the dipeptides and SDS micelles.
引用
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页码:1309 / 1317
页数:9
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