TY - JOUR
T1 - Specific ion effects in non-aqueous solvents
T2 - The case of glycerol carbonate
AU - Sarri, Filippo
AU - Tatini, Duccio
AU - Tanini, Damiano
AU - Simonelli, Matteo
AU - Ambrosi, Moira
AU - Ninham, Barry W.
AU - Capperucci, Antonella
AU - Dei, Luigi
AU - Lo Nostro, Pierandrea
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/9/15
Y1 - 2018/9/15
N2 - The effect of eight potassium salts (KF, K3PO4, KOCN, K2CO3, KCl, K2SO4, KBr and KI) on glycerol carbonate (GC) is studied through NMR, DSC, solubility and ATR-FTIR experiments. From the solubility data, the main thermodynamic functions of solution and solvation are estimated, and the mean molal activity coefficients are calculated. The results suggest that the capability of an anion to establish hydrogen bonds with the solvent molecules (or behave as a base, as in the case of fluoride, phosphate, cyanate and carbonate) is the most important structural feature that determines its effects on the solvent structure. On the other hand potassium iodide behaves in an anomalous way, due to the large polarizability of the anion that can form non-electrostatic, van der Waals dispersive intermolecular interactions.
AB - The effect of eight potassium salts (KF, K3PO4, KOCN, K2CO3, KCl, K2SO4, KBr and KI) on glycerol carbonate (GC) is studied through NMR, DSC, solubility and ATR-FTIR experiments. From the solubility data, the main thermodynamic functions of solution and solvation are estimated, and the mean molal activity coefficients are calculated. The results suggest that the capability of an anion to establish hydrogen bonds with the solvent molecules (or behave as a base, as in the case of fluoride, phosphate, cyanate and carbonate) is the most important structural feature that determines its effects on the solvent structure. On the other hand potassium iodide behaves in an anomalous way, due to the large polarizability of the anion that can form non-electrostatic, van der Waals dispersive intermolecular interactions.
KW - Glycerol carbonate
KW - Hofmeister series
KW - Ion pairs
KW - Specific ion effect
UR - http://www.scopus.com/inward/record.url?scp=85049448761&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2018.06.120
DO - 10.1016/j.molliq.2018.06.120
M3 - Article
SN - 0167-7322
VL - 266
SP - 711
EP - 717
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
ER -