Densities, Partial Molar Volumes at Infinite Dilution, Side-Chain Partial Molar Volumes, and Transfer Volumes of Dipeptides in Sucrose and 2,3-Butanediol Aqueous Solutions at T = (283.15 to 333.15) K

摘要

Apparent molar volumes and partial molar volumes at infinite dilution, V°2, for dipeptides (glycyl glycine, glycyl valine, glycyl leucine, glycyl phenylalanine, and glycyl asparagine) in aqueous sucrose and 2,3-butanediol solutions have been calculated from the measured densities in the temperature range of T = (283.15 to 333.15) K. Side-chain partial molar volumes, V°_(2,tr), and transfer volumes,Δ V°_(tr), for the dipeptides and side chains from water to aqueous additive environment have been calculated and analyzed in terms of possible solute—water, solute—cosolute, and cosolute—water interactions.