Structure-making ions become structure breakers in glassy aqueous electrolyte solutions

Inorganic ions are usually classified as structure makers or structure breakers according to the viscosity B-coefficients of their aqueous solutions at ordinary temperature. Structure-making ions enhance the hydrogen bond strength while structure-breaking ones weaken the hydrogen bonds in aqueous solution. We here show that even structure-making ions (assigned by their viscosity B-coefficients at ordinary temperature) become a structure breaker in the sense that they weaken the hydrogen bonds in aqueous solution at low temperatures when we compare the strength of hydrogen bonds with that for glassy water.