caa a22 4500 445327510 CHVBK 20180317142725.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10953-010-9627-5 doi (NATIONALLICENCE)springer-10.1007/s10953-010-9627-5 Intermolecular Interactions in Ternary Glycerol-Sample-H2O: Towards Understanding theHofmeister Series (V) [Elektronische Daten] [Peter Westh, Erik Rasmussen, Yoshikata Koga] We studied the intermolecular interactions in ternary glycerol (Gly)-sample (S)-H2O systems at 25 °C. By measuring the excess partial molar enthalpy of Gly, $H_{\mathrm{Gly}}^{\mathrm{E}}$, we evaluated the Gly-Gly enthalpic interaction, $H_{\mathrm{Gly}\mbox{--}\mathrm{Gly}}^{\mathrm{E}}$, in the presence of various samples(S). For S, tert-butanol (TBA), 1-propanol (1P), urea (UR), NaF, NaCl, NaBr, NaI, and NaSCN were used. It was found that hydrophobes (TBA and 1P) reduce the values of $H_{\mathrm{Gly}\mbox{--}\mathrm{Gly}}^{\mathrm{E}}$ considerably, but a hydrophile (UR) had very little effect on $H_{\mathrm{Gly}\mbox{--}\mathrm{Gly}}^{\mathrm{E}}$. The results with Na salts indicated that there have very little effect on $H_{\mathrm{Gly}\mbox{--}\mathrm{Gly}}^{\mathrm{E}}$. This contrasts with our earlier studies on 1P-S-H2O in that Na+, F− and Cl− are found as hydration centers from the induced changes on $H_{\mathrm{IP}\mbox{--}\mathrm{IP}}^{\mathrm{E}}$ in the presence of S, while Br−, I−, and SCN− are found to act as hydrophiles. In comparison with the Hofmeister ranking of these ions, the kosmotropes are hydration centers and the more kosmotropic the higher the hydration number, consistent with the original Hofmeister's concept of "H2O withdrawing power.” Br−, I− and SCN−, on the other hand, acted as hydrophiles and the more chaotropic they are the more hydrophilic. These observations hint that whatever effect each individual ion has on H2O, it is sensitive only to hydrophobes (such as 1P) but not to hydrophiles (such as Gly). This may have an important bearing towards understanding the Hofmeister series, since biopolymers are amphiphilic and their surfaces are covered by hydrophobic as well as hydrophilic parts. Springer Science+Business Media, LLC, 2010 Effect of solute on H2O nationallicence Ternary systems nationallicence Glycerol(Gly)-sample-H2O nationallicence Gly-Gly interactions nationallicence Reduction of Gly-Gly interaction by hydrophobes nationallicence No effects on Gly-Gly interaction by hydrophiles and hydration centers nationallicence Gly-probing methodology nationallicence Westh Peter NSM Research Unit for Functional Biomaterials, Roskilde University, 4000, Roskilde, Denmark aut Rasmussen Erik NSM Research Unit for Functional Biomaterials, Roskilde University, 4000, Roskilde, Denmark aut Koga Yoshikata Department of Chemistry, The University of British Columbia, V6T 1Z1, Vancouver, BC, Canada aut Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/1(2011-01-01), 93-105 0095-9782 40:1<93 2011 40 10953 https://doi.org/10.1007/s10953-010-9627-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10953-010-9627-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Westh Peter NSM Research Unit for Functional Biomaterials, Roskilde University, 4000, Roskilde, Denmark aut NATIONALLICENCE 700 1- Rasmussen Erik NSM Research Unit for Functional Biomaterials, Roskilde University, 4000, Roskilde, Denmark aut NATIONALLICENCE 700 1- Koga Yoshikata Department of Chemistry, The University of British Columbia, V6T 1Z1, Vancouver, BC, Canada aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/1(2011-01-01), 93-105 0095-9782 40:1<93 2011 40 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer