Far ultraviolet solution spectroscopy of hydroxide

Abstract

The far ultraviolet solution spectroscopy of hydroxide in a range of both blue and red-shifting solvents shows the absorption to be due to a c.t.t.s. transition. Comparison with the Treinin c.t.t.s. solvent scale shows OH to have a very high solvent sensitivity which, when normalised against the solvent sensitivity of solvated electron, shows a smooth, monotonic relationship for the halides and hydroxide plotted against their ionic radii. A linear correlation between the “excess energy” terms for these ions and their hydration entropies is demonstrated.