Figure 4.
Normalized OH stretch spectra (left) at 303 K (heavy lines) and 273 K (thin lines) for 90% D2O/10% H2O (v/v) (black), 80% D2O/20% H2O (v/v) (gray), 70% D2O/30% H2O (v/v) (light gray). Free energy analysis of the transition from high-energy to low-energy H-bonding as a function of temperature for the same conditions is shown on the right. Measurements were performed in duplicate for all conditions. Error bars represent one standard deviation.