Please use this identifier to cite or link to this item: http://hdl.handle.net/10216/103100
Author(s): Pedro P Madeira
Ana Bessa
Joana A Loureiro
Luis Alvares Ribeiro
Alirio E Rodrigues
Boris Y Zaslavsky
Title: Cooperativity between various types of polar solute-solvent interactions in aqueous media
Issue Date: 2015
Abstract: Partition coefficients of seven low molecular weight compounds were measured in multiple aqueous two-phase systems (ATPSs) formed by pairs of different polymers. The ionic composition of each ATPS was varied to include 0.01 M sodium phosphate buffer (NaPB), pH 7.4 and 0.1 M Na2SO4, 0.15 M NaCl, and 0.15 M NaClO4 all in 0.01 M NaPB, pH 7.4. The differences between the solvent features of the coexisting phases in all the ATPSs were estimated from partitioning of a homologous series of dinitrophenylated-amino acids and by the solvatochromic method. The solute-specific coefficients for the compounds examined were determined by the multiple linear regression analysis using the modified linear solvation energy relationship equation. It is established that the solute specific coefficients characterizing different types of the solute-water interactions (dipole-dipole, dipole-ion, and H-bonding) for a given solute change in the presence of different salt additives in the solute specific manner. It is also found that these characteristics are linearly interrelated. It is suggested that there is a cooperativity between various types of solute-water interactions governed by the solute structure.
Subject: Química
Chemical sciences
Call Number: 107199
URI: http://hdl.handle.net/10216/103100
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/00511/2013 - POCI-01-0145-FEDER-006939/Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia/LEPABE
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional
FEUP - Artigo em Revista Científica Internacional

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