Effects of Salts of the Hofmeister Series on the Hydrogen Bond Network of Water.
The effect of salts on water behavior has been a topic of interest for many years; however, some recent reports have suggested that ions do not influence the hydrogen bonding behavior of water. Using an effective two-state hydrogen bonding model to interpret the temperature excursion infrared response of the O-H stretch of aqueous salt solutions, we show a strong correlation between salt effects on water hydrogen bonding and the Hofmeister order. These data clearly show that salts do have a measurable impact on the equilibrium hydrogen bonding behavior of water and support models which explain Hofmeister effects on the basis of solute charge density.
Nucci
Nathaniel V
NV
Department of Biochemistry and Biophysics, University of Pennsylvania. 422 Curie Boulevard, Philadelphia, PA 19104, 1(215)898-8783, fax: 1*(215)573-2085, nvnucci@mail.med.upenn.edu.
Vanderkooi
Jane M
JM