The Heterotactic Enthalpic Interaction Coefficients of α-Amino Acids with Maltose in Aqueous Solution at T=298.15 K

Journal of Solution Chemistry - Tập 36 - Trang 1321-1330 - 2007
Yu Chen1, Huaji Liu1, Ruisen Lin2, Honglin Zhang3
1Department of Chemistry, School of Sciences, Tianjin University, Tianjin, People’s Republic of China
2Department of Chemistry, Zhejiang University, Hangzhou, People’s Republic of China
3Department of Chemistry, Qufu Normal University, Qufu, People’s Republic of China

Tóm tắt

The mixing enthalpies of maltose with several typical α-amino acids (glycine, L-alanine, L-serine, L-valine, L-threonine and L-proline) and dilution enthalpies of each compound have been determined in aqueous solutions at T=298.15 K by a flow-mixing microcalorimeter. The heterotactic enthalpic pairwise interaction coefficients, h xy , of each amino acid with maltose have been calculated by the McMillan–Mayer formalism, and are discussed in terms of intermolecular interactions of the hydrated solute species.

Tài liệu tham khảo

Castronuovo, G., Dario, R.P., Elia, V.: The hydrophobic effect in aqueous solutions of positional isomers of alkan-n-ols: A calorimetric study at 298.15 K. Thermochim. Acta 181, 305–313 (1991)

Davis, K.G., Lilley, T.H.: Aqueous solutions containing amino acids and peptides: Part 25. The enthalpy of interaction at 298.15 K of glycine with potassium halides. Thermochim. Acta 107, 267–276 (1986)